Boston Acoustics GT-424-Channel manual Setup Tuning-Full-Range Speakers

Installation—Fuses and Wiring (cont.)

Mono Subwoofer Operation

If the amplifier is to be bridged and used with a subwoofer connected to the REAR channels, use the “SPEAKER OUTPUT” terminals marked for mono use.

WARNING! Subwoofer impedance must not fall below 2 ohms when in MONO mode.

2-ohm minimum

Setup Tuning—Full-Range Speakers

1) Music

The material chosen for head unit/amplifier system setup must be both clear in recording quality and dynam- ic in amplitude. Many audiophile “test” discs have musical tracks with both of these characteristics and should be used.

2) FRONT and REAR Sensitivity Controls

Turn controls all the way counterclockwise (minimum position). In this position, the amplifier will be less sensitive to the input signal from the head unit.

3) FRONT and REAR Crossover Controls

Crossovers should be turned off during this phase of set-up. Move the HIGHPASS and FILTER switches to the “OFF” position—with these settings, full-range signal is sent to the FRONT & REAR speaker outputs.

OFF ON

OFF ON

HIGHPASS

LOWPASS SLOPE

LOWPASS

	350	12dB￿12dB 24dB
		ST	MONO
185	Hz
	20

	350
200	Hz

50

FRONT crossover control REAR crossover control

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