MB QUART ONX1.1500D, ONX4.80/500 ONX4.60 / ONX4.80 / ONX4.125, Channel Amplifiers, Onyx

ONX4.60 / ONX4.80 / ONX4.125

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 12dB

-X-OVER:Selects internal crossover functions

-FULL: Bypasses all crossovers for full frequency operation

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

-HPF: Selects the built in HIGH PASS filter, variable from 60Hz to 13KHz

CH3/4

CH1/2

LEVEL

BASS EQ

X-OVER

HPF

LPF

LINE OUT

R

R

POWER

PROTECTION

6V

0.2V

0dB

12dB

FULL LPF

HPF

60Hz

13KHz

30Hz

250Hz

MODE

L

L

LINE INPUT

6V

0.2V

0dB

12dB

FULL LPF

HPF

60Hz

13KHz

30Hz

250Hz

3

4

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: “2” indicates one set of RCA’s are being used. This will also pass signal to channels 3/4 through 1/2 inputs. “3” indicates bridging channels 3/4 while running 1/2 in stereo. “4” 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: “4” since 2 sets of RCA’s are connected.

LINE			CH3/4
INPUT			CH1/2
6V		6V	LEVEL
0.2V		0.2V
0dB		0dB	BASS
12dB		12dB	EQ
FULL		FULL	X
LPF		LPF	-OVER
HPF		HPF
60Hz		60Hz	HPF
13KHz		13KHz
30Hz		30Hz	LPF
250Hz		250Hz
2
3 4	MODE	PROTECTION	POWER
			LINE OUT

Control checklist:

- Refer to the section “Settings for Best Performance”

Minimum final loudspeaker impedances: - 2 ohm per channel.

				- RIGHT + - LEFT +
	OUTPUT CH 3/4	BRIDGED
	CH 1/2 SPEAKER			RIGHT + - LEFT +
		BRIDGED
	FUSE			-
ONYX			BATT+12VREMGND
	INPUTPOWER

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 3ch. 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 RIGHT +, and its negative terminal to LEFT

-as shown.

Switch setting checklist:

-1/2CH X-OVER: FULL

-3/4CH X-OVER: LPF 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.

MONO LINE INPUT

(Unless using procedure listed above for 3ch)

STEREO LINE INPUT

6

LINE			CH3/4
INPUT			CH1/2
6V		6V	LEVEL
0.2V		0.2V
0dB		0dB	BASS
12dB		12dB	EQ
FULL		FULL	X
LPF		LPF	-OVER
HPF		HPF
60Hz		60Hz	HPF
13KHz		13KHz
30Hz		30Hz	LPF
250Hz		250Hz
2
3 4	MODE	PROTECTION	POWER
			LINE OUT

ONYX

			- RIGHT + - LEFT +
OUTPUT CH 3/4	BRIDGED
CH 1/2 SPEAKER			RIGHT + - LEFT +
	BRIDGED
FUSE			-
		GND REM BATT+12V
POWER INPUT