AutoTek manual SM4-800 / SM4-1000 / 4 CHANNEL AMPLIFIER APPLICATIONS, Channel Full Range System

SM4-800 / SM4-1000 / 4 CHANNEL AMPLIFIER APPLICATIONS

4 CHANNEL FULL RANGE SYSTEM

Here we show how to use the 4 channel amplifiers as straight forward discrete 4	Channels 3/4:
channel full range units.	- HI PASS: N/A
Interconnect cable checklist:	- LOW PASS: N/A
- Connect the four inputs of the amplifier to a Radio/CD with quality RCA cables.	Level control checklist:
Switch setting checklist:	- Refer to the section “Setting up systems after installation for best performance”
- 1/2CH X-OVER: FULL	Minimum final loudspeaker impedances:
- 3/4CH X-OVER: FULL	- 2-Ohms per channel.

FULL RANGE

Crossover frequency control checklist:	SPEAKERS
Channels 1/2:
- HI PASS: N/A
- LOW PASS: N/A

FULL RANGE

STEREO LINE

INPUTS

	CH3/4		L
						LINE
	CH1/2					INPUT
	CH1		+ - g	HI IN		CH3
	H2		- +	UT	- +	CH4
	5V 0.2V		LEVEL		5V 0.2V	LEVEL
CHANNEL 1 / 2	0dB 12dB 60Hz 1.2KHz		BASS EQ HPF		0dB 12dB 60Hz 1.2KHz	BASS EQ HPF	CHANNEL 3 / 4
	30Hz 250Hz		LPF		30Hz 250Hz	LPF
	FULL LPF HPF		X-OVER	FULL LPF HPF		X-OVER
	LINE			CHANNEL	2 3 4	MODE
	OUTPUT	L			R

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

B IDGE

B IDGE

TO BATTERY + 12 Volts VIA FUSE

REMOTE TURN-ON

CHASSIS GROUND

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.

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”

- 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

Minimum final loudspeaker impedances:

-2-Ohms per channel in stereo mode.

-4-Ohms mono bridged.

MONO

OR SUB BASS

SPEAKER

STEREO

FULL RANGE

1STEREO

1MONO FULL RANGE LINE INPUTS

	CH3/4		LL
						LINE
	CH1/2					INPUT
	H1 CH2		- gnd- +	I INPUT	- gnd- +	CH3 CH4
	5V 0.2V		LEVEL		5V 0.2V	LEVEL
CHANNEL 1 / 2	0dB 12dB 60Hz 1.2KHz		BASS EQ HPF		0dB 12dB 60Hz 1.2KHz	BASS EQ HPF	CHANNEL 3 / 4
	30Hz 250Hz		LPF		30Hz 250Hz	LPF
	FULL LPF HPF		X-OVER	FULL LPF HPF		X-OVER
	LINE			CHANNEL	2 3 4	MODE
	OUTPUT	L			R

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

BRIDGED

B IDGED

TO BATTERY + 12 Volts VIA FUSE

REMOTE TURN-ON

CHASSIS GROUND

OR HIGHS

SPEAKERS

5