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Hersteller: Boston Acoustics Dateigröße: 440.54 kb Dateiname: Unterrichtssprache:

To engage Q-Tune move the selector switch to the “ON” position (refer to the diagram on page 3). 6) GTA-RSL Control The remote level control (GTA-RSL) gives you independent level adjustment of the subwoofer’s output level beyond the standard system volume control. Please refer to the RSL’s manual for installation instruction. The GTA-RSL is available separately, please consult your authorized Boston Acoustics dealer. fuseConnection Diagram: ring a Subwoofer (80Hz Lowpass) Tuning The Amplifier - Subwoofer( s) 9 Tuning The Amplifier - GTA-504 Tuning The Amplifier - Front Speakers and 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. If the head unit has any equalization or bass management features such as boost, they should be deactivated at this time. Turn head unit on, and verify that the BLUE status LED is illuminated on the amplifier. 2) Volume With the chosen musical track playing, turn the head unit volume control up until the maximum level of undistorted signal is heard from the speakers. For most head units, this will be at the end of the volume control range. WARNING! A distorted signal from the head unit sent to the amplifier can cause speaker failure at higher listening levels. 3) Input Sensitivity Control (Gain) Turn control (refer to the diagram on page 3) all the way counterclockwise (minimum position). In this position, the amplifier will be less sensitive to the input signal from the head unit. Slowly rotate this control clockwise until maximum undistorted playing level is heard from the subwoofer(s). Listen closely for faults such as bottoming from the subwoofer(s). If fault is detected, rotate input sensitivity control counterclockwise until fault is eliminated. At this point, the maximum undistorted subwoofer playing level has been defined. 4) Front Crossover Control To achieve higher undistorted playing levels from the main speakers, the highpass crossover must be engaged. Rotate the crossover control fully clockwise (refer to the diagram on page 3). The highpass crossover point is now set at 200Hz. Q-Tune should be set to off. Configuration and Connection GTA-504 Amplifier Powering Both 80Hz Highpass Front, 65Hz Lowpass 10 Tuning 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. Listen closely for bottoming from the speakers. If detected, rotate the input sensitivity control counterclockwise until it is eliminated. Slowly rotate the highpass crossover control counterclockwise while listening for bottoming. You are lowering the crossover point, which means that more bass signal is being sent to the speakers. If bottoming is detected, rotate the input sensitivity control counterclockwise until it is eliminated and/or rotate the Highpass crossover control clockwise to raise the crossover point. 5) Rear 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. A higher setting will increase the perceived output, and a lower setting will make the bass response more omnidirectional. 6) Q-Tune™ Control Once the crossover point has been determined, you may choose to use Q-Tune™ to increase the bass information. Q-Tune will offer a +6dB bass boost centered at 45Hz which can be beneficial if more low bass output is desired. To engage Q-Tune move the selector switch to the “ON” position (refer to the diagram on page 3). 7) Optional GTA-RSL Control The optional remote level control (GTA-RSL) gives you independent level adjustment of the subwoofer’s output level beyond the standard system volume control. Please refer to the RSL’s manual for installation instruction. The GTA-RSL is available separately, please consult your authorized Boston Acoustics dealer. Note; If using the GTA-504 to run front and rear speakers, set rear X-over to HP and follow set up/tuning instructions for the front channels for rear. Connection Diagram: th Front Speakers and a Subwoofer Lowpass Rear w/ Q-Tune™ On fuse Tuning The Amplifier - GTA-504 11 Amplifier Troubleshooting Guide Status LEDs on Amplifier not Lit—Head Unit (Source) Turned “ON” Verify Remote 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 Verify High-level cables from speaker(s) to amplifier are securely connected RCA or Speaker Level Input from amplifier to source are securely ...

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