Boss LMB-3 Owner’s Manual PDF

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Boss LMB-3 Owner’s Manual PDF
Boss Manual Boss Effects Unit Manual Boss Bass Limiter Enhancer Manual Boss LMB-3 Manual Boss Effects Unit Owner's Manual
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Year 2017
Language(s)
English en
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Summary of Content for Boss LMB-3 Owner’s Manual PDF

Page 1

* For a detailed explanation about the Ratio and Threshold Level, see About the Limiters Action.

AC Adaptor (PSA series; sold separately)

Electric Bass

English

LEVEL knob This knob adjusts the level of the effect sounds. Set the knob so there is no volume difference between the effect and straight bass guitar sounds. * If this knob is turned all the way to the left, no sound is heard when the

effect is on.

7 The BOSS LMB-3 is a limiter/enhancer specifically designed for electric bass. 7 The LMB-3 allows you to create a well-balanced sound by controlling the volume difference of the sound or to avoid sound distortion. 7 By adjusting the THRESHOLD level and RATIO knobs, the intensity of the limiter can be spontaneously controlled. 7 Using the Enhance effect, you can make the sound clearer and sharper.

OUTPUT jack Connect an amplifier to this jack.

Bass Amplifier

DC IN jack Accepts connection of an AC Adaptor (PSA series; sold separately). By using an AC Adaptor, you can play without being concerned about how much battery power you have left. * We recommend that you keep batteries installed in the unit even though youll be powering it with

the AC adaptor. That way, youll be able to continue a performance even if the cord of the AC adaptor gets accidentally disconnected from the unit.

* Use only the specified AC adaptor (PSA-series).

CHECK indicator This indicator shows whether an effect is ON/OFF, and doubles as the Battery Check indicator. The indicator lights when an effect is ON. * If this indicator goes dim or no longer lights while an effect is ON, the battery is near

exhaustion and should be replaced immediately. * The CHECK indicator shows whether the effect is on or off, and indicates the different

functions. It does not indicate whether the power to the device is on or not.

ENHANCE knob This knob adjusts the intensity of the enhance effect that makes the sound clearer and sharper. Rotating the knob clockwise emphasizes the effect.

Pedal Switch This switch turns the effects ON/OFF.

Thumbscrew When this screw is loosened, the pedal will open, allowing you to change the battery. * For instructions on changing the battery, refer to Changing the Battery.

Panel Descriptions

Main Features

THSHD knob This knob controls the threshold level (the level at which the compression effect will kick in). Rotating the knob counterclockwise lowers the threshold level.

RATIO knob This knob controls the compression ratio of the limiter. That is, it adjusts how much the limiter should compress those signals above the threshold level. * When it is set to 1:1, no limiter effect will be obtained.

INPUT jack This jack accepts input signals (coming from a bass guitar, some other musical instrument, or another effects unit).

* The INPUT jack doubles as power switch. Power to the unit is turned on when you plug into the INPUT jack; the power is turned off when the cable is unplugged. When not using the effects unit, be sure to disconnect the plug from the INPUT jack.

Owners Manual

* 5 1 0 0 0 7 3 5 1 0 - 0 1 *

Before using this unit, carefully read the sections entitled: USING THE UNIT SAFELY and IMPORTANT NOTES (supplied on a separate sheet). After reading, keep the document(s) where it will be available for immediate reference.

Precautions When Connecting 5 To prevent malfunction and equipment failure, always turn

down the volume, and turn off all the units before making any connections.

5 Once the connections have been completed, 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 your bass amp last.

When powering down: Turn off the power to your bass amp first.

5 Before turning the unit on/off, always be sure to turn the volume down. Even with the volume turned down, you might hear some sound when switching the unit on/off. However, this is normal and does not indicate a malfunction.

Use of Battery 5 A battery is supplied with the unit. The life of this battery may be

limited, however, since its primary purpose was to enable testing.

5 If you handle batteries improperly, you risk explosion and fluid leakage. Make sure that you carefully observe all of the items related to batteries that are listed in USING THE UNIT SAFELY and IMPORTANT NOTES (supplied on a separate sheet).

5 When operating on battery power only, the units indicator will become dim when battery power gets too low. Replace the battery as soon as possible.

5 Batteries should always be installed or replaced before connecting any other devices. This way, you can prevent malfunction and damage.

Changing the Battery 1. Hold down the pedal and loosen

the thumbscrew , then open the pedal upward.

* The pedal can be opened without detaching the thumbscrew completely.

2. Remove the old battery from the battery housing , and remove the battery snap connected to it.

3. Connect the battery snap to the new battery, and place the battery inside the battery housing.

* Be sure to carefully observe the batterys polarity (+ versus -).

4. Slip the coil spring onto the spring base on the back of the pedal, and then close the pedal.

* Carefully avoid getting the battery snap cord caught in the pedal, coil spring, and battery housing.

5. Insert the thumbscrew into the guide bush hole and tighten it securely.

9 V Battery

2017 Roland Corporation

Operating the Unit

1. When you have made the necessary connections, set the knobs as shown in the illustration.

2. Depress the pedal switch to turn the effect on. (Make sure that the CHECK indicator lights.)

3. Adjust the Threshold Level (the level at which compression starts) using the THSHD knob.

4. Adjust the compression ratio using the RATIO knob.

5. Adjust the intensity of the enhance effect using the ENHANCE knob.

6. Adjust the LEVEL knob so there will be no volume difference between the effect and straight bass sounds.

About the Limiters Action The LMB-3s limiter will function differently depending upon how you set the Threshold level and Ratio. The THSHD and RATIO knobs work as described below.

THSHD knob The Threshold Level is the level at which compression starts to work. When the input signal has reached the Threshold Level, the signal will be compressed at the compression ratio set with RATIO, then output. When the input signal is lower than the Threshold Level, it will be output without compression.

RATIO knob The compression ratio for the input signal is called Ratio. For instance, when the Ratio is set to 2:1, an input signal that is 6 dB louder than the Threshold Level will be compressed to one half, or 3 dB When it is set to :1, any input signal above the Threshold Level will be compressed to the Threshold Level, then output.

The following figure shows how the output signal is affected by the settings of the THSHD and RATIO knobs.

a

b Threshold Level

Ratio = a : b

Input Level (dBu)

O ut

pu t L

ev el

(d Bu

)

Threshold Level

Input Level (dBu)

O ut

pu t L

ev el

(d Bu

)

Main Specifications

Nominal Input Level -20 dBu

Input Impedance 1 M

Nominal Output Level -20 dBu

Output Impedance 1 k

Recommended Load Impedance 10 k or greater

Power Supply Carbon-zinc battery (9 V, 6F22) or Alkaline battery (9 V, 6LR61)

AC adaptor (PSA series: sold separately)

Dimensions 73 (W) x 129 (D) x 59 (H) mm

2-7/8 (W) x 5-1/8 (D) x 2-3/8 (H) inches

Weight 380 g / 14 oz (including battery)

Accessories Owners Manual

Leaflet (USING THE UNIT SAFELY, IMPORTANT NOTES, and Information)

Carbon-zinc battery (9 V, 6F22)

Options AC adaptor (PSA-series)

* 0 dBu = 0.775 V

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