AutoTek SM2-400, SM4-800, SM2-1000 manual Amplifier Feature Descriptions, Street Machine Amplifiers

AMPLIFIER FEATURE DESCRIPTIONS

STREET MACHINE AMPLIFIERS:

!Each model is capable of 4 & 2-Ohms stereo per channel, or 4-Ohms mono bridged operation except the mono amps which are capable of 4, 2 and 1-Ohm loads.

!Tri-Mode operation with any stereo pair of amplifier channels is possible, as with all bridgeable amplifiers.

!The input sensitivities for rated output powers are variable from 0.2 volt to 5 volt.

!All crossovers are fully variable in their respective ranges.

!Crossover filters are 12dB/Octave.

!A POWER LED indicates the powered up and turned on condition.

!All Crunch amplifiers feature a comprehensive diagnostic system, with speaker lead short circuit, and amplifier DC faults indicated by the red “PROTECT” LED.

!CAUTION: DO NOT OPERATE ANY AMPLIFIER BELOW THE INTENDED IMPEDANCE.. YOU WILL CAUSE DAMAGE TO THE AMPLIFIER THAT WILL NOT BE COVERED UNDER THE WARRANTY PRINTED IN THE BACK OF THE MANUAL. 2 & 4 Channel amps are capable of 4 and 2-Ohms wired stereo and 4-Ohms wired mono bridged. The mono amps are capable of 4, 2

The X-OVER slide switch selects the internal crossover functions:

-The input signal is routed directly to the LINE OUT RCA jacks, regardless of the X-OVER setting simplifying daisy chaining of amplifiers.

-HPF: Selects the built in HIGH PASS filter, variable from 60 Hz to 1.2kHz.

-FULL: Bypasses all crossovers for full frequency range operation.

-LPF: Selects the built in LOW PASS , variable from 30 Hz to 250Hz.

MODE: The mode switch allows you to choose Stereo for full range 2 channel operation or MONO for bridging operation

HIGH INPUT: If your radio/CD player does not have unbalanced (RCA) outputs, you can use the HIGH level (wire) inputs.

LINE INPUT: The line input accepts unbalanced (RCA) inputs from 0.2V to 5V.

LINE OUTPUT: The line output passes through signal from the line inputs which allows you to daisy chain multiple amplifiers from one signal.

The 4 channel amps have the same features as the 2 channel models accept that there are 2 sets of controls.

1 set for channels 1 & 2 and 1 set for channels 3 & 4.

In addition, the 4 channel models have a Mode switch which allows you to select 2, 3 or 4 channel operation.

The X-OVER slide switch selects the internal crossover functions:

-The input signal is routed directly to the LINE OUT RCA jacks, regardless of the X-OVER setting simplifying daisy chaining of amplifiers.

-HPF: Selects the built in HIGH PASS filter, variable from 60 Hz to 1.2kHz.

-FULL: Bypasses all crossovers for full frequency range operation.

-LPF: Selects the built in LOW PASS , variable from 30 Hz to 250Hz.

MODE: The mode switch allows you to choose Stereo for full range 2 channel operation or MONO for bridging operation

HIGH INPUT: If your radio/CD player does not have unbalanced (RCA) outputs, you can use the HIGH level (wire) inputs.

LINE INPUT: The line input accepts unbalanced (RCA) inputs from 0.2V to 5V.

LINE OUTPUT: The line output passes through signal from the line inputs which allows you to daisy chain multiple amplifiers from one signal.

-The LINE INPUT signal is routed directly to the LINE OUT RCA jacks, regardless of the X-OVER setting simplifying daisy chaining of amplifiers.

-SUBSONIC: Allows you to adjust the crossover filter from 15Hz to 55Hz.

-LPF: Allows yo to adjust the LOW PASS crossover filter from 40Hz to 150Hz.

MODE: The mode switch allows you to choose Stereo for full range 2 channel operation or MONO for bridging operation

LEVEL: Adjusts the input sensitivity from 0.2 volts to 5 volts.

BASS EQ: The Bass EQ is adjustable from 0db to 12dB.

REMOTE: This is the input jack for the under-dash bass remote module.

LINE INPUT: The line input accepts unbalanced (RCA) inputs from 0.2V to 6V.

LINE OUTPUT: The line output passes through signal from the line inputs which allows you to daisy chain multiple amplifiers from one signal.

SM2-400 / SM2-1000 / SM2-1200 2-CHANNEL AMPLIFIERS

L L

LEVEL	BASS EQ HPF	LPF	X-OVER	MODE
+ - gnd - +
HI INPUT			FULL LPF HPF	MONO STEREO
5V 0.2V	0dB 12dB 60Hz 1.2KHz	30Hz 250Hz

R R

LINE OUT LINE INPUT

Note that the LOW PASS signal is MONO.

-In the LPF position, the HIGH PASS filter acts as a subsonic filter.

-When the LPF mode is selected, a 0 to +12dB, at 45Hz, BASS -EQ is also switched in.

SM4-800 / SM4-1000 4-CHANNEL AMPLIFIERS

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

Note that the LOW PASS signal is MONO.

-In the LPF position, the HIGH PASS filter acts as a subsonic filter.

-When the LPF mode is selected, a 0 to +12dB, at 45Hz, BASS -EQ is also switched in.

SM1-1000.1 / SM1-1500.1 1-CHANNEL MONO BLOCK AMPLIFIERS

REMOTE	SUB			OUTPUT	INPUT
CONTROL		LPF	LEVEL
BASS EQ	SONIC			L	L
POWER
PROTECT	15Hz 55Hz	40Hz 150Hz	6V 0.2V	R	R
0dB 12dB

The mono amps are capable of 4, 2 & 1-Ohm loads. Operating the amp below 1-Ohm can cause damage to the amp not covered in the warranty.

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