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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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MB QUART ONX4.60 / ONX4.80 / ONX4.125, Channel Amplifiers, Or 3 Channel System, 2CH X-OVER Full 4CH X-OVER Full

ONX1.1500D, ONX4.125, ONX4.80/500, ONX1.1000D, ONX2.100 specifications

MB Quart, a renowned name in the audio industry, has made a significant impact with its ONX series, which includes models like the ONX4.80, ONX4.60, ONX2.100, ONX1.1000D, and ONX4.80/500. These amplifiers are designed to deliver powerful audio performance while being versatile enough to cater to various needs in the automotive sound sector.

The ONX4.80 is a 4-channel amplifier capable of delivering a robust 80 watts RMS per channel at 4 ohms, showcasing a total power output of 500 watts. This model incorporates a unique class-D topology that provides high efficiency and low distortion, ensuring that users can enjoy crisp sound quality without draining their vehicle’s power supply. Its compact design allows for easy installation in tight spaces, making it an ideal choice for both experienced installers and DIY enthusiasts.

Meanwhile, the ONX4.60, a slightly smaller 4-channel amplifier, offers 60 watts RMS per channel at 4 ohms, with a similar class-D configuration. This amplifier is particularly well-suited for users looking to power smaller speaker setups or as part of a multi-amplifier system. Its low-profile design and excellent thermal management features further enhance its performance, providing reliable power during extended listening sessions.

For those in need of monoblock power, the ONX1.1000D stands out with its impressive ability to deliver 1,000 watts RMS at 1 ohm. This amplifier is engineered to drive subwoofers with ease, thanks to its high-efficiency operation and comprehensive thermal protection circuitry. The ONX1.1000D also features an adjustable low-pass filter and bass boost controls, allowing users to tailor their low-frequency output to suit their specific preferences.

The ONX2.100, a 2-channel amplifier, rounds out the range with a strong 100 watts RMS per channel at 4 ohms. It is perfect for driving full-range speakers or as part of a larger multi-channel setup. Like its counterparts, the ONX2.100 employs advanced circuitry for low noise and high fidelity, making it an excellent choice for any audio enthusiast looking to enhance their vehicle’s sound system.

Collectively, the ONX series amplifiers from MB Quart embody robust performance, compact design, and superior technology, making them an ideal choice for anyone looking to elevate their automotive audio experience. Whether users seek powerful lows, clear mids, or crisp highs, there is an ONX model tailored to meet those needs while maintaining reliability and efficiency.