MB QUART FX1.600 FX4.50 / FX4.70 / FX4.100, Or 3 Channel System, 2CH X-OVER Full 4CH X-OVER Full

FX4.50 / FX4.70 / FX4.100

4-Channel Amplifiers

FEATURES:

-2 Sets of RCA inputs

-LEVEL: Variable sensitivity from 0.2V to 6V

-BASS EQ: Adjustable 45Hz bass boost from 0dB to 9dB

-X-OVER:Selects internal crossover functions

-FULL: Bypasses all crossovers for full frequency operation

-LP: Selects the built in LOW PASS filter, variable from 30Hz to 150Hz

-HP: Selects the built in HIGH PASS filter, variable from 10Hz to 1.2kHz

OUTPUT	X-OVER	LOW PASS		BASS EQ	Ch 3&4	HIGH PASS			LEVEL		INPUT
										Ch1
											Ch3
	LP/BP HP FULL	30Hz	150Hz	0dB	9dB	10Hz	1.2kHz	6V	0.2V
		INPUT MODE		X-OVER		HIGH PASS			LEVEL
	PROTECTION
	POWER	4CH	2CH	DUPE 3/4 HP	FULL	10Hz	1.2kHz	6V	0.2V
										Ch2	Ch4
							Ch 1&2

-POWER LED: Indicates the powered up and turned on condition

-PROTECTION LED: Indicates a high voltage, low voltage, short circuit, hard clip, over heating or DC fault condition.

-MODE: “2CH” indicates one set of RCA’s are being used. This will also pass signal to channels 3/4 through 1/2 inputs. “4CH” indicates connecting 2 sets of RCA’s to 1/2 and

3/4 inputs.

-LINE OUTPUT: Full range RCA pass through.

4 Channel Full Range Stereo:

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

MODE: “4CH” since 2 sets of RCA’s are connected.

			OUTPUT
POWER	PROTECTION	LP/BP HP FULL	X-OVER
4CH 2CH	INPUT MODE	30Hz 150Hz	LOW PASS
DUPE 3/4 HP	X-OVER	0dB	BASS EQ
FULL		9dB
10Hz	HIGH	10Hz	HIGH
1.2kHz	PASS	1.2kHz	PASS
6V	LEVEL	6V	LEVEL
0.2V		0.2V
Ch2			Ch1
			INPUT
Ch4			Ch3

Control checklist:

- Refer to the section “Settings for Best Performance”

Minimum final loudspeaker impedances: - 2 ohm per channel.

				-
				Ch1
		BRIDGED		+ -
				Ch2
				+
				-
				Ch3
		BRIDGED		+ -
				Ch4
				+
	FUSE
POWER INPUT			GND REM BATT+12V

2 or 3 Channel System:

Here we show how to use the 4 channel amplifiers as a 3 channel unit by taking advantage of the mono bridging capability of all MB Quart amplifiers. 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. If you only have 1 set of RCA outputs from your headunit, you can simply connect those to the inputs for ch 1/2 and switch the MODE to 2ch. The amplifier will auto sum the signal and provide mono output for bridged channels 3/4.

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 Ch4 +, and its negative terminal to Ch3 - as shown.

Switch setting checklist:

-1/2CH X-OVER: FULL

-3/4CH X-OVER: LP Control checklist:

-Refer to the section “Settings for Best Performance” Minimum final loudspeaker impedances:

-2 ohm per channel in stereo mode.

-4 ohm mono bridged.

STEREO LINE INPUT

MONO LINE INPUT

			OUTPUT
POWER	PROTECTION	LP/BP HP FULL	X-OVER
4CH 2CH	INPUT MODE	30Hz 150Hz	LOW PASS
DUPE 3/4 HP	X-OVER	0dB	BASS EQ
FULL		9dB
10Hz	HIGH	10Hz	HIGH
1.2kHz	PASS	1.2kHz	PASS
6V	LEVEL	6V	LEVEL
0.2V		0.2V
Ch2			Ch1
			INPUT
Ch4			Ch3

				-
				Ch1
		BRIDGED		+ -
				Ch2
				+
				-
				Ch3
		BRIDGED		+ -
				Ch4
				+
	FUSE
POWER INPUT			GND REM BATT+12V

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