Instruction/ maintenance manual of the product GTA-504 Boston Acoustics
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High P er formance T wo and F our Channel Ampliers GTA.
Specifications 2 Introduction T hank you for choosing Boston Acoustics and congratulations, you’ve made the right choice. Y ou’re now equipped for the open road.
Connections / Controls 3 Status LED The Boston Logo will illuminate “Blue” under normal operating conditions. The LED will illuminate “Red” during start-up and under fault conditions. If the LED is still red after start-up, please refer to troubleshooting on page 12.
Installation - General 4 W ARNING! Before driving the amplifier mounting screws through any surface, be sure of what is behind that surface. Check for the gas tank, brake lines, and any vehicle wiring harness. Never run wires outside or under the vehicle or where they could become broken or interfere with the safe operation of the vehicle.
Installation - Wiring 5 Amplifier Fuses Although the amplifier has an internal fuse (s), additional fuse protection should be installed as close as possible to the battery on the positive (+) power wire going to the amplifier . An inline fuse should be installed at no more than 18" (46cm) on the positive (+) power wire.
T uning The Amplifier - Front and Rear Speakers 6 1) Music The material chosen for head unit/amplifier system setup must be both clear in recording quality and dynamic in amplitude. Many audiophile “test” discs have musical tracks with both of these characteristics and should be used.
T uning The Amplifier - Front and Rear Speakers 7 T uning The Amplifier - Front or Rear Speakers W ARNING! A distorted signal from the head unit sent to the amplifier can cause loudspeaker failure at higher listening levels.
T uning The Amplifier - Subwoofer(s) 8 T uning The Amplifier - Subwoofer(s) 1) Head Unit The head unit should have all controls such as bass, treble, balance, and fader set to the flat or centered position. The volume control should be at the minimum setting.
T uning The Amplifier - Subwoofer(s) 9 T uning The Amplifier - Subwoofer(s) 4) Crossover Control Move the selector switch to “LP” (refer to the diagram on page 3). In this setting, lowpass signal is sent to the speaker outputs. Experiment with the crossover point settings while the subwoofer is active.
T uning The Amplifier - GT A-504 10 Configuration and Connection Diagram: GT A-504 Amplifier Powering Both Front Speakers and a Subwoofer 80Hz Highpass Front, 65Hz Lowpass Rear w/ Q-T une T uning The .
T uning The Amplifier - GT A-504 11 Connection Diagram: th Front Speakers and a Subwoofer Lowpass Rear w/ Q-T une ™ On T uning The Amplifier - Front Speakers and Subwoofer(s) 4) Front Crossover Control Cont. Slowly rotate the input sensitivity control clockwise until maximum undistorted playing level is heard from the speakers.
Amplifier T roubleshooting Guide S tatus LEDs on Amplifier not Lit—Head Unit (Source) T urned “ON” V erify Remote turn-on wire from source to amplifier has proper voltage P ower (B+) connections.
An important point after buying a device Boston Acoustics GTA-504 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Boston Acoustics GTA-504 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Boston Acoustics GTA-504 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Boston Acoustics GTA-504 you will learn all the available features of the product, as well as information on its operation. The information that you get Boston Acoustics GTA-504 will certainly help you make a decision on the purchase.
If you already are a holder of Boston Acoustics GTA-504, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Boston Acoustics GTA-504.
However, one of the most important roles played by the user manual is to help in solving problems with Boston Acoustics GTA-504. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Boston Acoustics GTA-504 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
