Setup Tuning-Full-range Speakers | Boston Acoustics GT-40 specification

GT-40_manual 4/10/03 4:17 PM Page 12

Installation—Fuses & 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 & 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 & 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.

FRONT crossover control

REAR crossover control