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Gallien-Krueger MB150S Service Manual

Gallien-Krueger MB150S
21 pages
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Service Manual
Micro Bass Series
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Gallien-Krueger MB150S Specifications

General IconGeneral
TypeBass Amplifier
Power Output150 Watts
Impedance8 Ohms
Speaker Configuration1x12"
Inputs1 x 1/4"
Outputs1 x 1/4", 1 x XLR
ControlsGain, Master
EQ3-band
EffectsContour

Summary

Amplifier Specifications

Output

Details amplifier output power and impedance specifications.

Headphones

Specifies headphone output characteristics and impedance.

Signal to Noise Ratio

Provides the signal-to-noise ratio measurement for the unit.

Active Equalization

Details the frequency ranges and adjustment levels for EQ.

Low Cut Filter

Describes the low-cut filter specifications and its effect.

Contour Filter

Details the contour filter characteristics and its tonal shaping.

Hi Boost Filter

Provides specifications for the hi-boost filter and its frequency response.

Impedances

Lists various input and output impedance values for connectivity.

Chorus (MB/E)

Specifies the chorus effect parameters for the MB/E model.

Dimensions

Provides physical dimensions and weight of the amplifier units.

Footswitch (MB/E)

Details the footswitch connection and control functions for MB/E.

Suggested System Configurations

Setting Up Your Sound

Suggested Procedures for Sound Setup

Step-by-step guide for adjusting amplifier controls for optimal sound.

Troubleshooting Guide

MB150S Preamp Turn-On and Testing

MB150S Setup Procedure

Procedure for connecting and preparing the MB150S for initial testing.

MB150S Power and Limiter Testing

Steps to test the power supply and limiter functions of the MB150S.

MB150S Input Setup and Gain Testing

Procedure for testing input signals and system gain on the MB150S.

Tone Controls Test Procedures

Voicing Filters Test Procedures

Noise Test Procedures

MB-S Waveform Diagrams

MB150E Preamp Turn-On and Testing

MB150E Setup Procedure

Procedure for connecting and preparing the MB150E for initial testing.

MB150E Power and Limiter Testing

Steps to test the power supply and limiter functions of the MB150E.

MB150E Input Setup and Gain Testing

Procedure for testing input signals and system gain on the MB150E.

MB150E Tone Controls Test

MB150E Voicing Filters Test

MB150E Boost, Chorus, and Balanced Outputs Test

MB150E Footswitch Test

Return and Stereo Aux In Test

MB150E Noise Test

MB-E Waveform Diagrams

Power Supply Board Schematic Diagram

MB-S Preamp Schematic Diagram

MB Amplifier Power Amp Schematic Diagram

Component Silkscreen Legend

Padmaster Component Trace Diagram

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