Table of Contents
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Table of Contents
Related Manuals for Gallien-Krueger 400RB/115
Summarization of Contents
Introduction to Gallien-Krueger 400RB
Always Listening Philosophy
Personal philosophy behind GK products and commitment to user feedback and innovation.
Sound Tips for 400RB Series
The Equalizer for Tone Tuning
Fine-tuning sound using active EQ circuits for diverse tones and sonic shaping.
Contour Control for Sound Shaping
Scoops mids and boosts highs/lows for a unique GK sound profile.
String Bass Feature for Low-End
Adjusts low-end response for five-string basses or desired voicing.
Boost and Master Controls
Adds tonal growl and manages overall output volume for desired sound.
Direct Out Functionality
Balanced output for PA/recording, with Pre/Post EQ and Ground Lift options.
Safety Information and Precautions
Verify Voltage and Amperage
Ensure proper AC circuit connection for safety and amplifier protection.
AC Circuit Capacity Requirements
High output requires adequate circuit capacity to prevent tripping or voltage variations.
Extension Cord Usage Guidelines
Avoid extension cords; use supplied cord and ensure proper placement.
Power Cord Handling
Handle cord gently, pull plug, not cord, and disconnect when not in use.
Amplifier Enclosure Safety
Do not open; contains no user-serviceable parts and poses shock hazard.
Unpacking and Shipping Precautions
Save original carton/materials for transport and future shipping needs.
Installation and Maintenance Guide
Installation Guidelines
Proper placement, ventilation, and environmental considerations for safe operation.
Cleaning Procedures
Use soft, dry cloths; avoid harsh chemicals and abrasives for cleaning.
Unit Maintenance
Rugged design requires minimal maintenance; use road case for frequent transport.
400RB Turn-On Procedure
Setup Steps
Initial configuration and connection steps before testing the amplifier.
Power Amp Bias and Output Test
Procedure to test power amp bias and output levels using DMM and dummy load.
Tones and Filters Test
Testing EQ and voicing filter effects using a square wave and oscilloscope.
Noise Test
Procedure to measure amp noise level with various controls set.
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