Boston Acoustics GT-28, GT-24 manual Lowpass Crossover Controls, Lowpass Slope

Control Functions (cont.)

6 Lowpass Crossover Controls

To use lowpass crossover move LOWPASS switch to righthand position. Lowpass crossover frequency is adjustable from 50Hz to 350Hz by rotary control. (Moving switch to left-hand position will bypass crossover functions.)

7 Lowpass Slope

Select appropriate crossover slope of 12 or 24dB/octave by moving LOWPASS SLOPE switch.

8 “Q” Control

The “Q” Control is active when the highpass crossover is engaged and is cen- tered on the selected crossover point. The range of operation is 0.7–1.2.

dB

Q

+1.6dB

0dB

-3dB

.707 .95 1.2

t (tuned crossover frequency)

9 Subwoofer Level Control Port

SUBWOOFER LEVEL switch should be set to “OFF” when control circuit is not installed, (see optional Subwoofer Level Control owners manual).

10Status LED Indicators

GREEN indicates the normal operating condition; the amplifier is “ON.” GREEN and RED together are normal when the amplifier is first turned “ON”; RED will turn off after a few seconds. When both GREEN and RED remain on, the ampli- fier is in thermal shutdown condition. RED only indicates a fault condition, “SAFE.”

OFF	ON
	LOWPASS
	350
200	Hz

50

LOWPASS SLOPE

12dB￿12dB 24dB

ST MONO

5