AutoTek AT-Series, AT3000.1 AT1200 / 4 Channel Amplifier Applications, Channel Full Range System

AT1200 / 4 CHANNEL AMPLIFIER APPLICATIONS

4 CHANNEL FULL RANGE SYSTEM

Here we show how to use the 4 channel amplifiers as straight forward discrete 4 channel full range units.

Interconnect cable checklist:

- Connect the four inputs of the amplifier to a Radio/CD with quality RCA cables.

Switch setting checklist: - 1/2CH X-OVER: FULL - 3/4CH X-OVER: FULL

Crossover frequency control checklist:

Channels 1/2:

- HI PASS: N/A

- LOW PASS: N/A

Level control checklist:

-Refer to the section “Setting up systems after installation for best performance”

Minimum final loudspeaker impedances: - 2-Ohms per channel.

FULL RANGE

SPEAKERS

Channels 3/4:

-HI PASS: N/A

-LOW PASS: N/A

FULL RANGE

STEREO LINE

INPUTS

	30Hz 250Hz		LPF		2 3		MODE
CHANNEL 1 / 2	60Hz1.2KHz 0dB 12dB 5V 0.2v	CH2	HPF BASS EQ LEVEL	LPF	4	CH1	X-OVER
4CH MONO MIX							INPUT
							OUTPUT
							INPUT
	5V 0.	CH4	LEVE	FULL		CH3	X-OVER
CHANNEL 3 / 4	0dB 12dB 60Hz 1.2KHz		BASSEQ HPF	PFLPF	+ - GND - +		CH1 CH2
	30Hz 250Hz		LPF		+ - GND - +		CH3 CH4

	OUTPUT	LEFT
	3/4 SPEAKER	IGHT	B IDGE
	CH	-
FUSE			TO BATTERY + 12 Volts VIA FUSE
POWERINPUT	REMGND+12V
			REMOTE TURN-ON
			CHASSIS GROUND
	OUTPUT	LEFT
	CH ½ SPEAKER	+RIGHT	B IDGE
		POWER PROTECT

2 or 3 CHANNEL FULL RANGE SYSTEM

Here we show how to use the 4 channel amplifiers as full range 2 or 3 channel units by taking advantage of the mono bridging capability of all Autotek amplifiers.

The following example shows how to create a 3 channel system by mono bridging channel pair 3 / 4. In order to create a 2 channel system, simply follow the example to also mono bridge channel pair 1 / 2.

Interconnect cable checklist:

-Connect the inputs of channel pair 1/2 to a suitable stereo source, e.g. a head unit with good quality RCA cables.

-A MONO signal source is required to bridge channel pair 3/4, such as would be available from the mono sub bass output of an active crossover, whether standalone, or built into a head unit or equalizer.

Important: Do not be tempted to connect the hot, or positive outputs, from any source together to obtain a mono signal, as this could very well damage the output stage of that source.

-It is necessary to feed the SAME signal to both left and right inputs via a Y- adapter RCA cable.

-Connect the mono speaker positive terminal to the LEFT +, and its negative terminal to RIGHT - as shown.

Switch setting checklist:

-1/2CH X-OVER: FULL

-3/4CH X-OVER: FULL

Crossover frequency control checklist:

Channels 1/2:

-HI PASS: N/A

-LOW PASS: N/A

Channels 3/4:

-HI PASS: N/A

-LOW PASS: N/A

TIP: If you are using the mono sub bass output of an active crossover, there is nothing wrong with switching in the low pass filter in these amplifiers for a steeper low pass rolloff.

Level control checklist:

-Refer to the section “Setting up systems after installation for best performance”

Minimum final loudspeaker impedances:

-2-Ohms per channel in stereo mode.

-4-Ohms mono bridged.

MONO
OR SUB BASS	STEREO
SPEAKER

FULL RANGE

1STEREO

1MONO FULL RANGE LINE INPUTS

	30Hz 250Hz		LPF	2 3		MODE
CHANNEL 1 / 2	60Hz1.2KHz 0dB 12dB0.2v	CH2	HPF BASS EQ VEL	4LPF H FULL	CH1	X-OVER
4CH MONO MIX						INPUT
						OUTPUT
						INPUT

	5V	CH4	L			CH3
	0.2v 0dB 12dB 60Hz 1.2KHz		EL BASS EQ HPF	LL HPF LPF		X-OVER
CHANNEL 3 / 4					+ - GND - +	CH1 CH2

30Hz 250Hz LPF + - GND - + CH3 CH4

	OUTPUT	+LEFT
	CH 3/4 SPEAKER	-+-RIGHT
FUSE
POWER INPUT	GND REM +12V
	OUTPUT	-+LEFT
	CH ½ SPEAKER	-+RIGHT
	POWER	PROTECT

BRIDGED

B IDGED

TO BATTERY + 12 Volts VIA FUSE REMOTE TURN-ON

CHASSIS GROUND

OR HIGHS

SPEAKERS

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