Roland A-60 Owner's Manual PDF

Owners Manual

Thank you, and congratulations on your choice of the Roland AC-60 Acoustic Chorus.

201b

These sections provide important information concerning the proper operation of the unit. Additionally, in order to feel assured that you have gained a good grasp of every feature provided by your new unit, Owners manual should be read in its entirety. The manual should be saved and kept on hand as a convenient reference.

Contents

IMPORTANT SAFETY INSTRUCTIONS...........................................2

USING THE UNIT SAFELY............................................................3

IMPORTANT NOTES ...................................................................5

Main Features...........................................................................6

Names of Things and What They Do .........................................7

Control Panel

..........................................................................7

Rear Panel

...........................................................................11

Example of Using Two Channels Combined .............................13

How to Use the Folding Stand.................................................14

Using a Speaker Stand ...........................................................15

Block Diagram........................................................................16

Specifications..........................................................................17

Before using this unit, carefully read the sections entitled:

IMPORTANT SAFETY INSTRUCTIONS (page 2)

USING THE UNIT SAFELY (page 34)

IMPORTANT NOTES (page 5)

202

Copyright 2003 ROLAND CORPORATION

All rights reserved. No part of this publication may be reproduced in any form without

the written permission of ROLAND CORPORATION.

AC-60_e.book 1

2

CAUTION RISK OF ELECTRIC SHOCK

DO NOT OPEN

ATTENTION: RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,

DO NOT REMOVE COVER (OR BACK).

NO USER-SERVICEABLE PARTS INSIDE.

REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated dangerous voltage within the products enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.

The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product.

INSTRUCTIONS PERTAINING TO A RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS.

IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS

WARNING - When using electric products, basic precautions should always be followed, including the following:

1. Read these instructions. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all instructions. 5. Do not use this apparatus near water. 6. Clean only with a dry cloth. 7. Do not block any of the ventilation openings. Install in

accordance with the manufacturers instructions. 8. Do not install near any heat sources such as radiators,

heat registers, stoves, or other apparatus (including amplifiers) that produce heat.

9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.

WARNING: IMPORTANT:

As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured markings identifying the terminals in your plug, proceed as follows:

The wire which is coloured GREEN-AND-YELLOW must be connected to the terminal in the plug which is marked by the letter E or by the safety earth symbol or coloured GREEN or GREEN-AND-YELLOW.

The wire which is coloured BLUE must be connected to the terminal which is marked with the letter N or coloured BLACK. The wire which is coloured BROWN must be connected to the terminal which is marked with the letter L or coloured RED.

THIS APPARATUS MUST BE EARTHED THE WIRES IN THIS MAINS LEAD ARE COLOURED IN ACCORDANCE WITH THE FOLLOWING CODE. GREEN-AND-YELLOW: EARTH, BLUE: NEUTRAL, BROWN: LIVE

For the U.K.

10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.

11. Only use attachments/accessories specified by the manufacturer.

12. Unplug this apparatus during lightning storms or when unused for long periods of time.

13. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.

WARNING: To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.

AC-60_e.book 2

AC-60_e.book 3

USING THE UNIT SAFELY

001

Before using this unit, make sure to read the instructions below, and the Owners Manual.

.......................................................................................................... 001-50

Connect mains plug of this model to a mains socket outlet with a protective earthing connection.

.......................................................................................................... 002a

Do not open or perform any internal modifica- tions on the unit.

.......................................................................................................... 003

Do not attempt to repair the unit, or replace parts within it (except when this manual provides specific instructions directing you to do so). Refer all servicing to your retailer, the nearest Roland Service Center, or an authorized Roland distributor, as listed on the Information page.

.......................................................................................................... 004

Never use or store the unit in places that are:

Subject to temperature extremes (e.g., direct sunlight in an enclosed vehicle, near a heating duct, on top of heat-generating equipment); or are

Damp (e.g., baths, washrooms, on wet floors); or are

Humid; or are

Exposed to rain; or are

Dusty; or are

Subject to high levels of vibration. .......................................................................................................... 008a

The unit should be connected to a power supply only of the type described in the operating instructions, or as marked on the rear side of unit.

..........................................................................................................

009

Do not excessively twist or bend the power cord, nor place heavy objects on it. Doing so can damage the cord, producing severed elements and short circuits. Damaged cords are fire and shock hazards!

.......................................................................................................... 010

This unit, either alone or in combination with an amplifier and headphones or speakers, may be capable of producing sound levels that could cause permanent hearing loss. Do not operate for a long period of time at a high volume level, or at a level that is uncomfortable. If you experience any hearing loss or ringing in the ears, you should immediately stop using the unit, and consult an audiologist.

.......................................................................................................... 011

Do not allow any objects (e.g., flammable material, coins, pins); or liquids of any kind (water, soft drinks, etc.) to penetrate the unit.

.......................................................................................................... Add

To avoid overheating and possible fire and shock hazards, the AC-60 must not be used in an enclosure with less than 50 cm air spacing from all sides.

..........................................................................................................

Used for instructions intended to alert the user to the risk of injury or material damage should the unit be used improperly.

* Material damage refers to damage or other adverse effects caused with respect to the home and all its furnishings, as well to domestic animals or pets.

Used for instructions intended to alert the user to the risk of death or severe injury should the unit be used improperly.

The symbol alerts the user to things that must be carried out. The specific thing that must be done is indicated by the design contained within the circle. In the case of the symbol at left, it means that the power- cord plug must be unplugged from the outlet.

The symbol alerts the user to important instructions or warnings.The specific meaning of the symbol is determined by the design contained within the triangle. In the case of the symbol at left, it is used for general cautions, warnings, or alerts to danger.

The symbol alerts the user to items that must never be carried out (are forbidden). The specific thing that must not be done is indicated by the design contained within the circle. In the case of the symbol at left, it means that the unit must never be disassembled.

3

AC-60_e.book 4

012a

Immediately turn the power off, remove the power cord from the outlet, and request servicing by your retailer, the nearest Roland Service Center, or an authorized Roland distributor, as listed on the Information page when:

The power-supply cord, or the plug has been damaged; or

If smoke or unusual odor occurs

Objects have fallen into, or liquid has been spilled onto the unit; or

The unit has been exposed to rain (or otherwise has become wet); or

The unit does not appear to operate normally or exhibits a marked change in performance.

.......................................................................................................... 013

In households with small children, an adult should provide supervision until the child is capable of following all the rules essential for the safe operation of the unit.

.......................................................................................................... 014

Protect the unit from strong impact. (Do not drop it!)

.......................................................................................................... 015

Do not force the units power-supply cord to share an outlet with an unreasonable number of other devices. Be especially careful when using extension cordsthe total power used by all devices you have connected to the extension cords outlet must never exceed the power rating (watts/amperes) for the extension cord. Excessive loads can cause the insulation on the cord to heat up and eventually melt through.

.......................................................................................................... Add

Never lift up and carry the AC-60 by holding the folding stand.

.......................................................................................................... 016

Before using the unit in a foreign country, consult with your retailer, the nearest Roland Service Center, or an authorized Roland distributor, as listed on the Information page.

.......................................................................................................... 026

Do not put anything that contains water (e.g., flower vases) on this unit. Also, avoid the use of insecticides, perfumes, alcohol, nail polish, spray cans, etc., near the unit. Swiftly wipe away any liquid that spills on the unit using a dry, soft cloth.

..........................................................................................................

101a

The unit should be located so that its location or position does not interfere with its proper venti- lation.

.......................................................................................................... 102a

Always grasp only the plug on the power-supply cord when plugging into, or unplugging from an outlet.

.......................................................................................................... 103a

At regular intervals, you should unplug the power plug and clean it by using a dry cloth to wipe all dust and other accumulations away from its prongs. Also, disconnect the power plug from the power outlet whenever the unit is to remain unused for an extended period of time. Any accumulation of dust between the power plug and the power outlet can result in poor insulation and lead to fire.

.......................................................................................................... 104

Try to prevent cords and cables from becoming entangled. Also, all cords and cables should be placed so they are out of the reach of children.

.......................................................................................................... 106

Never climb on top of, nor place heavy objects on the unit.

.......................................................................................................... 107a

Never handle the power cord or its plug with wet hands when plugging into, or unplugging from, an outlet.

.......................................................................................................... 108a

Before moving the unit, disconnect the power plug from the outlet, and pull out all cords from external devices.

.......................................................................................................... 109a

Before cleaning the unit, turn off the power and unplug the power cord from the outlet.

.......................................................................................................... 110a

Whenever you suspect the possibility of lightning in your area, pull the plug on the power cord out of the outlet.

.......................................................................................................... 120

Always turn the phantom power off when connecting any device other than condenser microphones that require phantom power. You risk causing damage if you mistakenly supply phantom power to dynamic microphones, audio playback devices, or other devices that dont require such power. Be sure to check the specifica- tions of any microphone you intend to use by referring to the manual that came with it.

(This instruments phantom power: 48 V DC, 10 mA Max) .......................................................................................................... 121

Do not remove the speaker grille and speaker by any means. Speaker not user replaceable. Shock hazardous voltages and currents are present inside the enclosure.

..........................................................................................................

4

AC-60_e.book 5

IMPORTANT NOTES

291b

In addition to the items listed under IMPORTANT SAFETY INSTRUCTIONS and USING THE UNIT SAFELY on pages 24, please read and observe the following:

Power Supply 301 Do not connect this unit to same electrical outlet that is being

used by an electrical appliance that is controlled by an inverter (such as a refrigerator, washing machine, microwave oven, or air conditioner), or that contains a motor. Depending on the way in which the electrical appliance is used, power supply noise may cause this unit to malfunction or may produce audible noise. If it is not practical to use a separate electrical outlet, connect a power supply noise filter between this unit and the electrical outlet.

307 Before connecting this unit to other devices, turn off the power to

all units. This will help prevent malfunctions and/or damage to speakers or other devices.

308 Although the LEDs are switched off when the POWER switch is

switched off, this does not mean that the unit has been completely disconnected from the source of power. If you need to turn off the power completely, first turn off the POWER switch, then unplug the power cord from the power outlet. For this reason, the outlet into which you choose to connect the power cords plug should be one that is within easy reach and readily accessible.

Placement 351 Using the unit near power amplifiers (or other equipment

containing large power transformers) may induce hum. To alleviate the problem, change the orientation of this unit; or move it farther away from the source of interference.

352a This device may interfere with radio and television reception. Do

not use this device in the vicinity of such receivers. 352b Noise may be produced if wireless communications devices, such

as cell phones, are operated in the vicinity of this unit. Such noise could occur when receiving or initiating a call, or while conversing. Should you experience such problems, you should relocate such wireless devices so they are at a greater distance from this unit, or switch them off.

354b Do not expose the unit to direct sunlight, place it near devices

that radiate heat, leave it inside an enclosed vehicle, or otherwise subject it to temperature extremes. Also, do not allow lighting devices that normally are used while their light source is very close to the unit (such as a piano light), or powerful spotlights to shine upon the same area of the unit for extended periods of time. Excessive heat can deform or discolor the unit.

355b When moved from one location to another where the temper-

ature and/or humidity is very different, water droplets (conden- sation) may form inside the unit. Damage or malfunction may result if you attempt to use the unit in this condition. Therefore, before using the unit, you must allow it to stand for several hours, until the condensation has completely evaporated.

356b Do not allow rubber, vinyl, or similar materials to remain on the

unit for long periods of time. Such objects can discolor or otherwise harmfully affect the finish.

359 Do not paste stickers, decals, or the like to this instrument.

Peeling such matter off the instrument may damage the exterior finish.

Add Do not allow objects to remain on top of the unit while it is in

operation.

Maintenance 401a For everyday cleaning wipe the unit with a soft, dry cloth or one

that has been slightly dampened with water. To remove stubborn dirt, use a cloth impregnated with a mild, non-abrasive detergent. Afterwards, be sure to wipe the unit thoroughly with a soft, dry cloth.

402 Never use benzine, thinners, alcohol or solvents of any kind, to

avoid the possibility of discoloration and/or deformation.

Additional Precautions 553 Use a reasonable amount of care when using the units buttons,

sliders, or other controls; and when using its jacks and connectors. Rough handling can lead to malfunctions.

556 When connecting / disconnecting all cables, grasp the connector

itselfnever pull on the cable. This way you will avoid causing shorts, or damage to the cables internal elements.

557 A small amount of heat will radiate from the unit during normal

operation. 558a To avoid disturbing your neighbors, try to keep the units volume

at reasonable levels. You may prefer to use headphones, so you do not need to be concerned about those around you (especially when it is late at night).

559a When you need to transport the unit, package it in the box

(including padding) that it came in, if possible. Otherwise, you will need to use equivalent packaging materials.

562 Some connection cables contain resistors. Do not use cables that

incorporate resistors for connecting to this unit. The use of such cables can cause the sound level to be extremely low, or impos- sible to hear. For information on cable specifications, contact the manufacturer of the cable.

921 To prevent malfunction and/or damage to speakers or other

devices, always turn down the volume, and turn off the power on all devices before making any connections.

941 Once the connections have been completed (p. 11), turn on power

to your various devices in the order specified. By turning on devices in the wrong order, you risk causing malfunction and/or damage to speakers and other devices. When powering up:

Turn on the power to the AC-60 last. When powering down:

Turn off the power to the AC-60 first. 942 This unit is equipped with a protection circuit. A brief interval (a

few seconds) after power up is required before the unit will operate normally.

Add Wrap the AC cord around the cord hook when trans-porting or

storing the unit. 945 If you need to turn off the power completely, first turn off the

POWER switch, then unplug the power cord from the power outlet. Refer to Power Supply.

5

6

AC-60_e.book 6

Main Features

The AC-60 is a compact, high-performance monitor amp developed exclusively for use with acoustic instruments. It fully presents the harmonic richness of tone characteristic of acoustic instruments.

Compact, High-Performance Stereo Amp

Comes equipped with two specially developed 16-cm (6.5-inch) wide-range speakers.

Features stereo output (30 W + 30 W).

Housed in a bass-reflex cabinet.

Features Two Independent Channels, GUITAR and MIC/LINE

Each channel includes a 3-band equalizer.

GUITAR channel handles both piezo and magnetic pickups.

The MIC/LINE channel features phantom power, utilizing highly reliable, dedicated 48 V-output phantom circuitry.

Using the MIC/LINE channel for LINE input allows you to connect guitars with magnetic pickups. You can use a single guitars piezo and magnetic pickups simultaneously and mix (blend) the sounds together.

High-Quality Digital Effects Includes three types of stereo chorus: SPACE,

whereby the chorus is synthesized in actual space; RICH, in which the amount of the effect is applied separately in each frequency range; and WIDE, which provides an enhanced sense of expansiveness using discrete frequency bands.

Includes stereo reverb developed especially for acoustic instruments, which gives a sense of spaciousness and natural body to the sound.

Also features a delay effect developed especially for acoustic instruments, which produces a soft, tuned sound.

Furthermore, you can connect an optional foot switch and use it to turn these effects on and off.

Anti-Feedback Suppresses Feedback Anti-feedback features two ways to detect the feedback

point, using the Manual settings, or the Auto settings, which allow the feedback point to be detected automatically.

You can connect an optional foot switch and use your foot to operate this feature.

Mute Function The Mute switch provided makes it easy for you to mute

the sounds for the AC-60s own speakers as well as the sounds from LINE OUT. By using the Mute function, you can plug in and out noiselessly at the guitar. Furthermore, when you have a tuner connected to TUNER OUT, the Mute function lets you tune your instrument without outputting any sound.

You can connect an optional foot switch and use your foot to turn this on and off.

External Input Jacks (AUX IN) Includes external input jacks, allowing you to connect a

CD player, backing machine, or other device in stereo.

These include both RCA phono jacks and 1/4 phone jacks, making it possible to connect just about any kind of device.

Multiple Output Connectors Features DI out that allow you to output directly the

signals input from connected instruments and mics. You can also connect a tuner. Compatible with TRS balanced output.

Line outs feature 1/4 phone mono-output jacks in addition to XLR connectors for stereo output. You can use a single AC-60 for all applications.

It also features a subwoofer out. Connecting a powered subwoofer allows you to play with an even punchier, more powerful low end.

The amp also includes a headphones out that you can use when playing during nighttime hours and when making sound checks.

Convenient Placement Features Includes an folding stand that allows you to change

the angle of the amp when using it for monitoring purposes.

It also includes a speaker stand adapter, which allows you to attach the AC-60 to a speaker stand. This makes using the AC-60 easier when you are performing standing up, and allows you to use the amp as a simple PA.

Also included is a carrying case for greater portability.

AC-60_e.book 7

Names of Things and What They Do

Control Panel fig.010

1. INPUT

(GUITAR CHANNEL)

Connect guitars here.

(MIC/LINE CHANNEL)

Connect mics and line-level devices here. You can also connect guitars with pickups equipped with preamps.

This handles balanced input, so you can connect 1/4 phone TRS jacks and XLR-type connectors. fig.030

You can use the two channels in combination. Refer to Example of Using Two Channels Combined (P.13).

2. PICKUP button This switches the input circuitry for either piezo or magnetic pickups, according to the type of pickup on the connected guitar. Press down the button for magnetic pickups.

* Set this to MAGNETIC if your guitar has an active pickup

equipped with a preamp.

3. SHAPE button Setting this to ON modifies the midrange to create a bright tone suitable for strumming chords.

This emphasizes brushing sounds, allowing you to strum with a more edgy feeling.

4. PHANTOM switch This turns the phantom power on and off.

Set this to ON when connecting mics that require phantom power (condenser mic, etc.).

Set this to OFF when connecting mics that do not require phantom power or other devices.

Use the following sequence when connecting mics that require phantom power:

1. Turn the PHANTOM switch off.

2. Connect the mic.

3. Turn the PHANTOM switch on.

Supplying phantom power to mics that do not require it or supplying it to other devices may cause such equipment to malfunction. Always be sure to turn the switch off before connecting.

* To protect the circuitry, all output is muted momentarily after

the PHANTOM switch is turned on or off.

* Phantom power is supplied only to the XLR connectors for the

MIC/LINE channel INPUT.

* Noise may be produced if connectors are connected or

disconnected while the phantom power is turned on.

1 2 3 10 11 16 1796 7 8

4 5 12 13 14 15 18

XLR

TRS

7

Names of Things and What They Do

AC-60_e.book 8

Phantom Power

Because they have a comparatively wider range and better sound quality than dynamic mics, condenser mics are often used for miking acoustic guitars. However, they require a power source to operate. Although some condenser mics run off batteries placed within the mic housing, in many cases a type of power supply known as phantom power is required. This power supply uses the existing mic cable to feed power.

The AC-60s phantom power is output at a constant 48 V, so it conforms to professional specifications required at recording studios.

5. SELECT button This switches the input level to match that of the connected device (mic or line).

You can connect guitars with magnetic pickups when LINE is selected with the SELECT button.

* Note that the volume is increased if the switch is set to MIC

when you have a line-level device connected.

6. VOLUME knob * When using the AC-60 with the GUITAR channel and MIC/

LINE channel mixed, adjust the volume balance between the

two channels with the VOLUME knob.

(GUITAR CHANNEL)

This adjusts the volume of the GUITAR channel.

* To accommodate the lower output of piezo pickups, the volume

level when the VOLUME knob is between the 7 and 10

positions is set somewhat higher when the PICKUP button is

set to PIEZO in comparison with the MAGNETIC setting.

(MIC/LINE CHANNEL)

This adjusts the volume of the MIC/LINE channel.

7. BASS knob This adjusts the level of the low-frequency range.

Turning the knob to the right (clockwise) emphasizes the feeling of body in the sound.

8. MIDDLE knob This adjusts the level of the midrange.

Turning the knob to the right creates a fatter sound when melodies or individual notes are played.

9. TREBLE knob This adjusts the level of the high-frequency range.

Turning the knob to the right emphasizes brushing sound when chords are stroked.

The tone of acoustic instruments varies immensely from one instrument to the next. The kind of sound required also varies according to how an instrument is being used in a particular ensemble. Actively use the BASS, MIDDLE, and TREBLE knobs to adjust the tone to suit the instrument you are using and the conditions in which it is being used.

(Example)

When using the AC-60 with the speaker stand attached, you may want to turn up the BASS knob so the lower range is perceived better.

If the sound seems too harsh, such as immediately after changing strings, you may want to turn down the TREBLE knob to cut back on the high frequencies.

10. CHORUS button This turns the chorus on and off.

The indicator lights up when this is on.

You can use a foot switch (the optional BOSS FS-5U) to switch the chorus on and off. Turning the chorus on and off with the foot switch works on both channels.

11. CHORUS knob You can switch between the three types of chorus (SPACE, RICH, and WIDE) by setting this knob.

You can adjust the amount of effect applied by changing the position of the knob.

* This is enabled when the CHORUS button is in the ON

position.

* The markings indicating the SPACE and RICH positions are

approximate. Listen to the sound to confirm the effect as you

make adjustments.

SPACE

This is a spacially synthesized chorus. With spacially synthesized chorus, a method available only in stereo, the chorus effect is created by taking the sound from the right speaker, from which the effect sound is output, and the sound from the left speaker, which outputs the direct sound, and then mixing them in the actual space. This creates a greater lateral spread than that produced when the sounds are mixed electronically, providing a more natural sense of breadth.

8

Names of Things and What They Do

AC-60_e.book 9

RICH

This is a stereo chorus that is divided into three frequency ranges.

Here, the effect is separated into three bands, low-frequency, midrange, and high-frequency, and by applying the most suitable amount of chorus effect in each range, it provides a sense of fullness and breadth that is perfectly suited to the acoustic guitar.

The low end is firmly in the center, and sound spreads out more and more as the sound rises from the midrange up through the higher frequencies.

WIDE

While also relying on the division of sound into separate bands, this chorus offers even greater expansiveness than RICH.

The sound image spreads beyond the AC-60s speakers, producing an effect that seems to envelope the listener in sound.

12. REVERB/DELAY knob You can adjust this knob to switch between the reverb and delay effects.

You can adjust the amount of effect applied by changing the position of the knob.

* Turn the knob to OFF if you are not using the reverb or

delay effect.

* The markings indicating the reverb and delay positions are

approximate. Listen to the sound to confirm the effect as you

make adjustments.

REVERB

This stereo reverb, developed especially for acoustic instruments, gives a sense of spaciousness and natural sonic quality.

Turn the knob to adjust the volume of the reverb effect.

DELAY

This delay, developed especially for acoustic instruments, adds soft reflections to the original sound.

Turn the knob to change the delay time.

* You can use a foot switch (the optional BOSS FS-5U) to

switch the reverb and delay on and off.

13. FREQUENCY knob This selects the frequency at which the anti-feedback function operates.

Use the knob to switch between automatic and manual settings for the operational frequency. (p. 10)

fig.031

* Turn the knob to OFF if you are not using anti-feedback.

14. START button This starts automatic detection of the feedback point.

The indicators show the operating status of the automatic detection function.

Standby: Flashes slowly

During Detection: Flashes rapidly

After Detection: Remains lit

* Holding down the START button for one second or longer

puts automatic detection in standby.

ANTI-FEEDBACK fig.32

Anti-feedback is a function that controls feedback that arises between the guitar or mic and the amp.

The feedback is suppressed by attenuating the frequency at which the feedback occurs.

* This is not designed to work with respect to the high-frequency

feedback that can occur when using microphones.

Anti-feedback can be used in two different ways; you can make use of either the Auto settings or the Manual settings.

Feedback

This is a phenomenon where signals output from the speakers are then picked up again by the mic or pickup, and the sound is further amplified and output from the speakers, resulting in an unpleasant oscillating sound.

* If the anti-feedback alone does not control the feedback, adjust

your settings, for example by lowering the volume or cutting

the low frequencies.

MANUAL

9

Names of Things and What They Do

AC-60_e.book 10

Setting the Feedback Point Automatically

You can have the frequency at which the feedback is suppressed be determined automatically.

* Use in conditions where feedback occurs.

1. Turn the FREQUENCY knob to the AUTO position. fig.033

The ANTI-FEEDBACK indicator flashes slowly, and automatic detection goes into standby.

2. Press the START button.

Automatic detection of the feedback point starts. The indicator flashes rapidly when detection is in progresses, and when the feedback point is found, the indicator lights steadily. If no feedback point is detected, the indicator flashes slowly, and the automatic detection function returns to standby.

3. Press the START button once more to conduct the

automatic detection again.

Setting the Feedback Point Manually

Turn the knob to select the frequency at which the feedback is to be suppressed.

Turn the knob, moving through the range of L through H (the ANTI-FEEDBACK indicator lights up) to set the frequency at which the feedback is to be suppressed. fig.34

The frequency to which the anti-feedback function is applied increases as the knob is turned to the right.

You can use a foot switch (the optional BOSS FS-5U) to run automatic detection of the feedback frequency or to turn the anti-feedback function on and off.

You can use anti-feedback even when feedback is not a problem. For example, you can use it to remove undesirable resonance in the low to midrange, as well as correct other problems with the sound quality.

15. MUTE button This switches the Mute function on and off.

When you press the button, the MUTE indicator flashes, muting is turned on, and the speaker output and sounds from SUB WOOFER OUT and LINE OUT are muted.

With the mute function activated, you do not need to turn down the VOLUME knob or MASTER knob to mute the noise when plugging into, or unplugging from your guitar.

* Sounds from the DI OUT/TUNER OUT and PHONES jacks

are not muted.

By connecting a tuner (optional) to DI OUT/TUNER OUT and then pressing the MUTE button, you can tune your instrument without the sound being output from the speakers.

You can use a foot switch (the optional BOSS FS-5U) to switch muting on and off. (p. 12)

16. MASTER knob This adjusts the volume from the speakers, PHONES, and SUB WOOFER OUT.

17. PHONES jack Headphones are connected here. No sounds are output from the speakers or from SUB WOOFER OUT when headphones are connected.

18. POWER switch This turns the AC-60s power on and off.

The POWER indicator lights up when the power is on.

* This unit is equipped with a protection circuit. A brief interval

(a few seconds) after power up is required before the unit will

operate normally. 945

* If you need to turn off the power completely, first turn off the

POWER switch, then unplug the power cord from the power

outlet. Refer to Power Supply (p. 5).

10

Names of Things and What They Do

AC-60_e.book 11

Rear Panel fig.040

1. LINE OUT jack You can connect a mixer, recording device, or other such device here. The output level is +4 dBu.

Included here are XLR connectors (L/R: stereo output) and 1/4 phone jacks (mono output). fig.090

* You cannot adjust the volume for LINE OUT with the MASTER knob.

* When outputting stereo sounds from LINE OUT, you may not be able to achieve the same effect with sounds of spacially synthesized chorus (SPACE, WIDE) that you get when these sounds are played through the AC-60s own speakers.

2. SUB WOOFER OUT jack You can connect a powered subwoofer to play back sounds with an even punchier, more powerful low end.

The volume is adjusted with the MASTER knob.

3. AUX IN jack You can connect a CD player, backing machine, or other device and play back sounds in stereo. Inputs feature both RCA phono jacks and 1/4 phone jacks. When only the left 1/4 phone jack is connected, playback is in mono.

Although the input from AUX IN is output from the speakers, PHONES, and SUB WOOFER OUT, it is not output from LINE OUT. The volume is adjusted with the MASTER knob and muting on/off for these sounds is controlled with the MUTE button.

5431 2

White Red

PCS-31

Anti-FeedbackMute On/Off

White Red

PCS-31

Reverb/Delay On/Off

Chorus On/OffTunerMixer

CD Player

Backing Machine

Powered Sub Woofer

Mixer Recorder

11

Names of Things and What They Do

AC-60_e.book 12

If devices are connected to both the RCA phono jacks and the 1/4 phone jacks, then the two inputs are mixed.

4. DI OUT/TUNER OUT jack The direct sound of the device or instrument connected to the GUITAR or MIC/LINE channel is output here. This is a 1/4 phone TRS jack with balanced output.

You can also use this jack to connect a tuner. fig.070

* If balanced output is not required, use a 1/4 phone (mono)

plug to connect to this jack.

If balanced output is not required, you can use the special connection cable (the optional PCS-31) to use the DI OUT and TUNER OUT simultaneously. fig.080

Be sure to connect the tuner to COLD (red side of PCS-31).

5. FOOT SW jack The AC-60 accepts the FS-5L (latch type) and FS-5U (momentary type) foot switches.

* Set the polarity switch as shown below. fig.071

(MUTE, ANTI-FEEDBACK)

Using a special connection cable (the optional PCS-31) to connect two foot switches (the optional BOSS FS-5L and FS- 5U), you can use the FS-5L to switch muting on and off, and use the FS-5U to operate the anti-feedback function. fig.050

When a 1/4 phone (mono) plug is used to connect only one foot switch, only the Mute on/off function is enabled. Connect an FS-5L for this.

The MUTE button should be set to off when a foot switch is connected for muting.

* You cannot switch the muting off by pressing the foot switch

when the MUTE button is on (when the MUTE indicator is

lit).

* When using an FS-5U (momentary type) to switch muting on

and off, the muting is switched on only while the switch is held

down.

The foot switchs function with anti-feedback is as shown below.

When the FREQUENCY knob is positioned in the range from L to H, the switch turns the anti-feedback function on and off.

When the FREQUENCY knob is positioned at AUTO, the switch functions as the START switch for the automatic detection. Holding the foot switch down for one second or longer returns the automatic detection function to standby mode.

(CHORUS, DELAY/REVERB)

Using a special connection cable (the optional PCS-31) to connect two foot switches (the optional BOSS FS-5U), you can use one FS-5U to switch the chorus on and off, and use the other FS-5U to switch the delay or reverb on and off. fig.060

When a 1/4 phone (mono) plug is used to connect only one foot switch, only the chorus on/off function is enabled.

* The chorus on/off function works on both channels.

* You cannot switch the chorus on and off by pressing the foot

switch when the CHORUS button is off.

Tuner

White Red

PCS-31

Recoreder

12

AC-60_e.book 13

Example of Using Two Channels Combined

When Using One Guitar with Two Types of Pickups GUITAR CHANNEL:

PiezoPickup (PICKUP button = PIEZO)

MIC/LINE CHANNEL:

Magnetic Pickup (SELECT button = LINE)

You can balance the volume levels using each channels VOLUME knob, and adjust the tone for each pickup to attain the optimal sound with the equalizer (BASS/MIDDLE/TREBLE) knobs.

When Using a Mic and a Pickup GUITAR CHANNEL:

Piezo or Magnetic Pickup

MIC/LINE CHANNEL:

Condenser or Dynamic mic (SELECT button = MIC)

This allows you to blend the fat midrange of the pickup with the mics delicate high end.

Set the PHANTOM switch to ON if using a condenser mic.

When Using Two Guitars GUITAR CHANNEL:

Guitar 1 ......... Piezo or Magnetic Pickup

MIC/LINE CHANNEL:

Guitar 2 ......... Magnetic Pickup (SELECT button = LINE)

You can switch guitars without having to readjust the volume and tone.

PIEZO

MAGNETIC

PIEZO

Condenser mic or Dynamic mic

MAGNETIC or

MAGNETIC

PIEZO MAGNETIC

or

Guitar 1

Guitar 2

13

1

AC-60_e.book 14

How to Use the Folding Stand

When using the AC-60 on floors, or in other low-lying positions, then setting up and using the folding stand can make it easier to hear the sounds from the speakers. fig.100

When using the folding stand, always be sure to place it so the AC-60 remains level.

When not using the folding stand, fold it up, and secure it to the bottom of the amp using the stoppers. fig.101

Never lift up and carry the AC-60 by holding the folding stand.

Never place any objects on top of the AC-60 when using the folding stand.

Stopper

4

AC-60_e.book 15

Using a Speaker Stand

By using a speaker stand, you can mount the AC-60 at the optimal height for use as a monitor speaker or simple PA device. fig. Caution

The AC-60 is designed to be used only with speaker

stands whose dimensions meet the specifications

described below.

Do not use it with a speaker stand that does not meet the

following specifications. fig.120

fig.130

Before use, adjust the speaker stand to a height of 165 cm

(65) or less and a leg spread of 120 cm (47-1/4) or more,

as shown in the figure below. fig.110\

Using a speaker stand that does not meet the

specifications at left or that is adjusted to a height over

165 cm (65), or a leg spread of less than 120 cm (47-1/4)

may result in damage to equipment or injury due to the

stand tipping over.

When using AC-60 with a speaker stand, the speaker

stand must be carefully placed so it is level and sure to

remain stable.

Cables connected to AC-60 should be given enough slack

to prevent accidents that might result from someone

tripping over them.

To prevent accidents due to falls, do not place any object

on the AC-60 when its mounted on a speaker stand.

Always have at least one other person assist you when

mounting the AC-60 on a speaker stand, or when

adjusting the height of the stand while the AC-60 remains

mounted on it.

Leg spread: 120 cm or more

Diameter: 3.8 cm (1-1/2)

(47-1/4)

Diameter: 136 cm or more

Leg spread: 120 cm or more (47-1/4)

(53-9/16)

165 cm or less

120 cm or more

(65)

(47-1/4)

15

1

AC-60_e.book 16

Block Diagram

fig.block

S P

E A

K E

R G

U IT

A R

IN P

U T

L( M

O N

O )

M IC

/L IN

E IN

PU T

D I O

U T/

TU N

E R

O U

T

S U

B W

O O

FE R

O

U T

P H

O N

E S

R

R E

V E

R B

/D E

LA Y

C H

O R

U S

A N

T I

F E

E D

B A

C K

L R

M O

N O

S T

E R

E O

P O

W E

R A

M P

G U

IT A

R C

H A

N N

E L

M IC

/L IN

E C

H A

N N

E L

L R

V O

LU M

E

B A

S S

M

ID D

LE

T R

E B

LE

V O

LU M

E

B A

S S

M

ID D

LE

T R

E B

LE

S T

E R

E O

E F

F E

C T

A U

X IN

L IN

E O

U T

M A

S T

E R

V O

L

+ +

L R

6

AC-60_e.book 17

Specifications

Rated Power Output

30W + 30W

Nominal Input Level (1 kHz)

GUITAR Channel: -10 dBu

MIC/LINE Channel: -50 / -10 dBu

AUX IN: -10 dBu

Nominal Output Level (1 kHz)

DI/TUNER OUT: +4 dBu

LINE OUT: +4 dBu

SUB WOOFER OUT: +4 dBu

* 0 dBu = 0.775 Vrms

Speakers

16 cm (6.5 inches) x 2

Controls

(GUITAR Channel)

PICKUP Switch (PIEZO/MAGNETIC)

SHAPE Switch

VOLUME Knob

Equalizer Knobs (BASS, MIDDLE, TREBLE)

CHORUS Switch

(MIC/LINE Channel)

PHANTOM Switch

SELECT Switch (MIC/LINE)

VOLUME Knob

Equalizer Knobs (BASS, MIDDLE, TREBLE)

CHORUS Switch

CHORUS Knob

REVERB/DELAY Knob

(ANTI-FEEDBACK)

FREQUENCY Knob

START Button

MUTE Switch

MASTER Knob

POWER Switch

Indicator

CHORUS (GUITAR Channel, MIC/LINE Channel)

ANTI-FEEDBACK

MUTE

POWER

Connectors

GUITAR Channel Input Jack (1/4 phone type)

MIC/LINE Input Jack (XLR type, 1/4 phone type)

AUX IN Jacks (RCA phono type,1/4 phone type)

DI/TUNER OUT Jack (1/4 TRS phone type)

LINE OUT Jacks (XLR type, 1/4 phone type)

SUB WOOFER OUT Jack (1/4 phone type)

PHONES Jack (1/4 TRS phone type)

FOOT SWITCH Jack (1/4 TRS phone type)

Power Supply

AC 117 V, AC 230 V, AC 240 V

Power Consumption

68 W

Dimensions

380 (W) x 270 (D) x 268 (H) mm

15 (W) x 10-11/16 (D) x 10-9/16 (H) inches

Weight

9.8 kg

21 lbs 10 oz

Accessory

Carrying Case

Owners Manual

Options

Foot Switch: BOSS FS-5L (Mute On/Off), BOSS FS-5U

Connection Cable: PCS-31

962a

* In the interest of product improvement, the specifications and/

or appearance of this unit are subject to change without prior

notice.

17

AC-60_e.book 18

MEMO

18

This product complies with the requirements of European Directives EMC 89/336/EEC and LVD 73/23/EEC.

For EU Countries

For Canada

This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.

Cet appareil numrique de la classe B respecte toutes les exigences du Rglement sur le matriel brouilleur du Canada.

NOTICE

AVIS

For the USA

FEDERAL COMMUNICATIONS COMMISSION RADIO FREQUENCY INTERFERENCE STATEMENT

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help.

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation.

Unauthorized changes or modification to this system can void the users authority to operate this equipment. This equipment