Rear Crossover Control, Optional GTA-RSL Control

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 sepa- rately, 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.

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