Control Functions

STEREO

MONO

OFF

FUSE 4 x 25A

INPUT

SUBWOOFER LEVEL

LOWPASS SLOPE

LOWPASS

HIGHPASS

12dB

12dB 24dB

350

MONO

200

185

MONO

0.2

1.2

B+

GND

INPUT SENSITIVITY

2.6

0.95

Q/HP

I NPUT

REMOTE

SUBWOOFER LEVEL

0.7

SPEAKER OUTPUT

12.6–14.4VDC

GROUND

GT-28 Top Panel Shown

1
	STATUS	MONO	12.6–14.4VDC		GROUND
		MONO	12.6–14.4VDC		GROUND
9			B+	B+	GND	GND
		L	R
	ON	10
	SAFE	10
2

GT-28 Front Panel Shown

	1 RCA Inputs	1
	RCA cables from head unit or from other line level device should be connected	1

	here. Use both inputs (L and R) for stereo; use “L” input for mono.	2

2 Remote Input

Use the supplied FEMALE quick-connector to connect the REMOTE trigger lead from the head unit to the ampliﬁer. Ampliﬁer turns “ON” when head unit is turned “ON.” One FEMALE .210" connector is supplied with ampliﬁer.

3 Input Switch

STEREO

MONO

INPUT L

In the left position, the L and R inputs go to the L and R channels of the ampliﬁ- er. In the right position, the input is for mono operation.

4 Input Sensitivity Control

Turn control clockwise to increase the ampliﬁer sensitivity to incoming signals. Turn

control counterclockwise to decrease the ampliﬁer sensitivity.

5 Highpass Crossover Controls

To use 12dB/octave crossover, move HIGHPASS switch to right-hand position. Highpass crossover frequency is adjustable from 20Hz to 350Hz by rotary control. (Moving switch to left-hand position will bypass crossover functions.)

0.2

INPUT SENSITIVITY 2.6

OFF	ON
	HIGHPASS
	350
185	Hz