Tuning The Amplifier - Subwoofer(s)
4) Lowpass Crossover Control
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. Since the Lowpass cannot be disengaged, set to 15Hz if using an outboard processor or electronic crossover on the headunit.
5) Q-Tune™Control
Once the highpass crossover point has been determined, use the Q-Tune™ control (refer to the diagram on page 3) to increase the bass information centered around the highpass crossover point.
Setting the Q-Tune™ control is done in conjunction with setting the levels on the input sensitivity and highpass crossover (subsonic) frequency controls. You may find while setting the Q-Tune™ that over-excursion may be detected in the subwoofer (s); lowering the Q-Tune™ input sensitivity or raising the highpass crossover point will eliminate this. Minor adjustments to each setting are required to fine-tune the sys- tem.
Setting the Q-Tune™ is a subtle process. It is recommended that the Q-Tune™ set- ting be left in the 0.7 position and adjusted only after the input sensitivity and highpass crossover ranges are known. Small adjustments to the Q-Tune™ setting are all that are required to fine-tune the system.
6) GTA-RSL Subwoofer Output 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 GTA-RSL’s manual for installation instruction. The GTA-RSL is available separately, please consult your authorized Boston Acoustics dealer.
