Setup Tuning-Full-range Speakers | Boston Acoustics GT-20 GT-222

Installation—Fuses & Wiring (cont.)

Mono Subwoofer Operation

When the ampliﬁer is conﬁgured for mono operation, 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) Input Sensitivity Control

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

3) Highpass & Lowpass Crossover Controls

Crossovers should be turned “OFF” during this phase of setup. Move the HIGHPASS and LOWPASS switches to the “OFF” position—with these settings, full-range signal is sent to the speaker outputs. If bot- toming is detected from speakers, move HIGHPASS switch to “ON” and slowly rotate clockwise until bot- toming is eliminated.

Boston Acoustics GT-20 GT-222 Setup Tuning-Full-range Speakers, Mono Subwoofer Operation, Music