Boston Acoustics GT-20 GT-222 manual Setup Tuning-RearFill Speakers, Setup Tuning-Subwoofers

Setup Tuning—Full-range Speakers (cont.)

8) “Q” Control

Once the highpass crossover point has been determined, use the “Q” control to increase the bass information centered around the crossover point.

Setting the “Q” control is done in conjunction with setting the levels on the input sensitivity and highpass crossover frequency controls. You may find while setting the “Q” that bottoming may be detected in the front speakers; lowering the “Q” input sensitivity or raising the highpass crossover point will eliminate this. Minor adjustments to each setting are required to fine-tune the system.

Setting the “Q” is a subtle process. It is recommended that the “Q” setting 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” setting are all that are required to fine-tune the system.

Setup Tuning—Rear Fill Speakers

You may set the channels for summed mono operation from the L & R RCA inputs by setting the INPUT switch to the right-hand, MONO, position and then connecting the L & R REAR loudspeakers normally as you would for regular stereo operation. This configuration is beneficial for rear fill in some applica- tions.

Setup Tuning—Subwoofers

1) Input Switch

Move switch to the right-hand (MONO) position; the inputs are summed to mono. Connect the subwoofer to the SPEAKER OUTPUT terminals marked for MONO operation. NOTE: Subwoofer impedance is 2 ohms minimum.

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