Amplifier Troubleshooting Guide

Status LEDs on Amplifier not Lit—Head Unit (Source) Turned “ON”

VerifyRemote turn-on wire from source to amplifier has proper voltage

Power (B+) connections at amplifier, terminal blocks, and battery are secure Ground (GND) connections at amplifier and vehicle chassis are secure Battery B+ fuse and amplifier fuse are OK

B+ at battery and B+ at amplifier have proper voltage

Status LEDs Lit, no Output from Speakers—Speakers in Normal Operating Condition

VerifyHigh-level cables from speaker(s) to amplifier are securely connected

RCA or Speaker Level Input from amplifier to source are securely connected Sensitivity adjustment on amplifier is correctly adjusted

Engine Noise from Speaker(s)

Turn source “OFF” and disconnect RCA cables at amplifier

If noise stops, check equipment and cables leading to amplifier

VerifyRCA cables are of good quality with no breakage to internal shields RCA cables from source to amplifier are not run alongside power

Amplifier Output Distorted—Music not Recorded with Intentional Distortion

VerifySource output to amplifier is not distorted

Amplifier input sensitivity is correctly adjusted

Amplifier Shutting Down, RED LED Lit—Amplifier in Thermal Protection Mode

VerifyAmplifier is mounted with adequate space around heatsink

Amplifier is not mounted under carpet

Speakers meet correct impedance for application (mono or stereo hookup)

Amplifier not Turning “ON”, RED LED Lit—Amplifier not Connected to a Shorted Speaker

VerifySpeaker crossover is not defective

High-level cables from speaker to amplifier are not shorted

Amplifier not Turning “ON”, RED LED Lit—Speakers, Crossovers, and Cable OK

 

Internal fuse needs to be replaced

Verify

Replace fuse with fuse of same value

Amplifier not Turning “ON”, RED LED Lit—Speakers, Crossovers, and Cable OK

Amplifier requires service

If Service Seems Necessary:

First, contact the dealer from whom you purchased the product, or contact us via e-mail at:

USA and Canada: support@bostona.com

Europe: support@bostona.com

Japan: ba_info@dm-holdings.com

Asia/Pacific countries: service@dm-singapore.com

We will promptly advise you of what action to take.

Boston Acoustics, Inc. 300 Jubilee Drive, Peabody, MA 01960 USA

T: 978.538.5000 F: 978.538.5100 W: bostonacoustics.com/car

Boston, B/A ellipse symbol, Boston Acoustics, and the Boston Acoustics logo are registered trademarks and Q-Tune is a trademark of Boston Acoustics, Inc. Specifications are subject to change without notice. © 2009 Boston Acoustics, Inc. All rights reserved. Covered by patents issued and/or pending. 142-003796-0

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Boston Acoustics GTA-504 Amplifier Troubleshooting Guide, Status LEDs on Amplifier not Lit-Head Unit Source Turned on

GTA-504, GTA-802, GTA-502 specifications

Boston Acoustics has long been synonymous with high-quality audio equipment, and their GTA series of amplifiers—the GTA-502, GTA-802, and GTA-504—showcase the brand’s commitment to delivering exceptional sound performance. Each model in the GTA series is designed to cater to different audio needs, while maintaining Boston Acoustics' hallmark of precision and clarity.

The Boston Acoustics GTA-502 is a two-channel amplifier that delivers a robust power output of 50 watts per channel at 4 ohms, making it an excellent choice for smaller audio systems or as part of a more extensive setup. One of its standout features is the Class AB amplification, which combines high efficiency with minimal distortion, allowing for dynamic sound reproduction. The GTA-502's compact size and lightweight construction make it an ideal option for those with limited space, while still providing rich, powerful audio that can fill a room.

Stepping up in power, the GTA-802 is a versatile 2-channel amplifier with an impressive output of 80 watts per channel at 4 ohms. This amplifier incorporates advanced thermal protection and short circuit protection technologies that ensure reliability and longevity. With its user-friendly interface, including precise gain controls and an LED indicator for monitoring performance, the GTA-802 is not only powerful but also easy to use. Its enhanced frequency response and low total harmonic distortion provide a clear and balanced audio experience, making it a popular choice among audiophiles.

The GTA-504 is the powerhouse of the series, featuring a 4-channel amplifier with 50 watts per channel at 4 ohms. This flexibility allows users to run multiple speakers or create a bi-amped system, optimizing sound performance. Like its counterparts, the GTA-504 benefits from Class AB amplification, which delivers a warm sound with detail and nuance that enriches any listening experience. The amplifier also includes a built-in crossover, making it suitable for both home theater setups and high-fidelity music systems. Its rugged construction signifies durability, ensuring that the unit stands up to the challenges of consistent use.

In conclusion, Boston Acoustics’ GTA series amplifiers—the GTA-502, GTA-802, and GTA-504—embody the brand's dedication to superior sound quality and innovative design. Each model offers its unique features and capabilities, catering to diverse audio needs while ensuring excellent performance, precision, and reliability. Whether you're an audiophile or a casual listener, the GTA series promises to enhance your audio journey with their rich, enveloping sound.