Boston Acoustics GT-5750 Subwoofer Input Sensitivity Control, Lowpass Crossover Control, Phase

Tuning The Amplifier - Subwoofer (s)

5) Subwoofer Input Sensitivity Control

Turn control (refer to the diagram on page 5) 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

8) Lowpass Crossover Control

Move the selector switch to either 12dB or 24dB (refer to the diagram on page 5). In this setting, lowpass sig- nal is sent to the subwoofer 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.

9) Phase

Subwoofer phase is relative to the front and rear loudspeakers. Correct electrical phase does not always mean correct acoustic phase. Swap positive (+) and negative (-) connections at the speaker outputs where the sub- woofer is connected to the amplifier. It is beneficial to listen to the subwoofer connected in both phase condi- tions. The subwoofer should be left in the condition in which the strongest bass response is noted.

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5-Channel Operation (Single RCA) Wiring Configuration Diagram

Tuning The Amplifier - Subwoofer (s)

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