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MB Quart ONX4.80

4-Channel ONYX Series Car Amplifier (ONX-4.80)

In Stock. Only 2 Left!
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List price $279.95

$119.99

with warranty

You Save: $159.96 (57.14%)

Arrives by Wednesday, July 30 to zip 07095

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Success is a Measurement of Quality and Power

The success of any car audio amplifier depends on system quality and construction, ease of installation and configuration, and sound enhancing features. MB Quart engineers built the all new Onyx series amplifiers from the ground up to be an affordable amplifier with the audiophile and performance enthusiast in mind. This series is composed of value-packed class A/B amplifiers that boast affordability without sacrifice to power or quality. All Onyx Amplifiers come clothed in a beautiful new age piano black finish which accents interiors and brings a whole new level of sophistication to swallow. To match, the line of Onyx Speakers shows off the same piano black finish applied to their polypropylene cone woofers. It’s a perfect match every time.

Speaking of features, Onyx amplifiers bring the full tuning spectrum to your fingertips with variable high-pass, low-pass and subsonic filters built-in. To increase endurance, MB Quart designed Onyx amplifiers with military grade printed circuit boards and built-in system diagnostics that keep these amps running strong. High speed MOSFET output devices are used in the power supply to give you the best watts-per-dollar ratio. It’s not hard to see how success has been written all over these amplifiers, though with a piano finish that looks that good, we know you will be staring.

  • ONYX Series 4-Channel Class A/B Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 80 watts x 4 chan.
    • 2 ohms: 160 watts x 4 chan.
    • Bridged, 4 ohms: 320 watts x 2 chan.
  • CEA-2006 compliant amplifier
  • PWM (Pulse Width Modulated) MOSFET power supply
  • LED power (green) and protect (red) indicators
  • Variable Bass Boost (0 to +12 dB bass boost at 45 Hz
  • 4/3/2 channel operation
  • Unbalanced RCA input jack
  • Preamp RCA outputs to daisy chain multiple amps
  • 4-Way System Protection circuitry (DC, thermal, overload, and speaker short protection)
  • Piano black gloss finish with illuminated logo
  • Heavy duty aluminum alloy convection heatsink for superb heat dissipation
  • Silver-plated RCA level inputs
  • Silver-plated screw terminals
  • Input sensitivity:
    • Low level: 200mV-6V
  • Variable high-pass filter (60-13,000 Hz, 24 dB/octave)
  • Variable low-pass filter (30-250 Hz, 24 dB/octave)
  • Damping factor: >180
  • Frequency response: 10-45,000 Hz
  • Dimensions: 14-7/8"L x 9"W x 2-1/2"H
  • 4-gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits when purchased together with this amplifier.
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Power Specifications - Full Range Channels

RMS Power @ 4 ohms

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 4 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

80 watts x 4 channels
RMS Power @ 2 ohms

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 2 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

160 watts x 4 channels
Bridged RMS Power

Bridging refers to combining two channels on an amplifier to create one channel with double the voltage and an increased power output. A 2-channel amplifier will bridge down to 1-channel and a 4-channel amplifier can bridge to create 2-channels. An amplifier is most commonly bridged to drive a subwoofer.

Remember, once you bridge two channels down to one its final impedance will be 4 ohms unless otherwise specified. This rating lists the RMS power created once an amplifier is bridged.

320 watts x 2 channels

Amplifier Specifications

Amplifier Class

An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.

AB
Number of Channels
Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
4
Total RMS Power Output
Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

The RMS output figure is much more accurate than the peak rating when comparing products.

640 watts
Maximum Input Gauge Size
This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
4 AWG
Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
2 ohms
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
4 ohms
THD at Rated RMS Power
The amount of change in harmonic content of the signal as it is amplified. A lower figure indicates less change and a more accurate amp. THD below 0.10% is inaudible.
0.05%
Speaker Level Inputs
Speaker level inputs are commonly referred to as high-level inputs and vice versa. This input type allows you to get your audio signal directly from the speaker wire in your vehicle, instead of using RCA cables. The advantage of this is factory integration, as most stock radios do not have RCA outputs to run amplifiers.
No
Preamp Outputs
Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.
1 pair
Built-in Crossover

A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

Low-pass (LP)
High-pass (HP)
Full (AP)
High-Pass Crossover Frequency
The high-pass crossover frequency can be a fixed crossover point or a variable crossover range. A variable high-pass crossover allows you to select a specific crossover point which allows frequencies above the set crossover point to pass, while making frequencies below the set point gently or harshly roll-off, depending on the steepness of the slope.

The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

60 - 13,000 Hz
Low-Pass Crossover Frequency
The low-pass crossover frequency is typically used for subwoofers. It can be a fixed crossover point or a variable crossover range. A variable low-pass crossover allows you to select a specific crossover point which allows frequencies below the set crossover point to pass, while making frequencies above the set point gently or harshly roll-off, depending on the steepness of the slope.

The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

30 - 250 Hz
Signal-to-Noise Ratio
This spec compares the strength of the signal to the level of background noise. A higher value indicates less background noise.
>92 dB
Channel Separation
Also referred to as crosstalk. The amount of interference on one stereo channel caused by the leaking of the other stereo channel. The higher the rating in decibels (dB), the better the Channel Separation.
>80 dB
Bass Boost
The objective of the bass boost is to get more kick out of your subwoofer. It is a circuit that emphasizes the lower frequencies at a given point. The bass boost should always be set first before setting the gain. This feature is known for destroying subwoofers and is commonly used incorrectly, so be cautious.
0 - 12 dB
Bass/Gain Remote
If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.
No
Fan Cooled
A great feature to have if an amp generates a large amount of heat. Cooling fans can help regulate the temperature to prevent the amp from overheating (burning).
No
Fuse Rating
The amperage and the number of fuse(s) an amp requires.
25A x 2 
CEA-2006 Compliant
Amplifiers that have been tested to meet specific standards. When a car amplifier meets these standards, you can be sure that it will be able to produce the amount of power specified by the official CEA-2006 rating. Usually, these rating consist of the following items:
  • RMS Power
  • Signal-to-Noise Ratio

This rating applies to both external car amplifiers, as well as the amplifiers inside of in-dash stereos.

Yes

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
75%
4 Star
11%
3 Star
7%
2 Star
4%
1 Star
4%

Average Attribution Rating

Durability
4.4
Value
4.8
Features
4.5
Design
4.5
Usability
4.6

Rashid

Kansas CityRaytown, MO

Overall
Durability
Value
Features
Design
Usability

real good amp

August 1, 2012

Man this amp is hard. It makes all my speakers like im at a concert or something. I would reccomend this to anybody that wants quality sound for a good price.

1 of 1 found this helpful

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PSH

Southwest FL

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Value
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Usability

Great amp and great value

February 29, 2012

I recently was introduced to car audio and it has quickly grown into a hobby as mine. I started by purchasing a pair of Kicker DS68 for my rear deck and bought a JVC head unit as well. I quickly realized deck power was not ample for speakers so I started looking into amps. A friend of mine works at B**t Buy and is heavy into the car audio scene. He recommended MB Quart for amps. I looked into them and was taken aback by how cheap they sell. I can't possibly get a quality product for this price, can I? Well, I was way wrong. This thing POUNDS. I still have stock speakers on the front and will be very surprised if the sound quality doesn't jump up by 1/2 when I have them installed. I have no sound issues and it is quite easy on the eyes too. The glossy black on matte on gloss is very nice too and the light adds a dash of "bad*ss" to the amp. It doesn't overheat and it sits under my seat. You would have to pay quite a bit more to get anything near this quality. I only put 4 stars for ease of use because I am still learning how the toggles work, it is not a knock on the product.

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Micky

NYC

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Value
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Usability

musical majic

November 17, 2011

I have owned the others and like the maxxsonics amps because they have the most flexible and easiest controls. I dont know why they even bother with a Hifonics line when this MBquart line is the best and actually I think it sounds better than any amp out there which makes this amp an absolute gem and steal for the price. I also had both the Hifonics Zeusi80 and the Autorek1400. The Zeus was a nice amp, with sweet highs, and the Autotek was very nice amp also, with rich mids, BUT THIS mbquart just sounds so open and clear and musical that I would say borderline magical. The only oher explanation for such unbelievable sound is my new head unit I put at same time, a Pioneer HD unit. I seriously doubt you can get a better sounding amp for at least double the price. I also had a Polk660, and none compares to this amp. It just sounds so open, big, and clear at low and loud levels. If I had to sum it up in a main characteristic, it would be "transparently immersive" as you seem to be in the music, not just listening. I have to credit some of this to the head unit as well. I used to think I had overly bright and lean speakers untill I upgraded and now they sound totaly transparent :)

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doug h.

albany,ny

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Value
Features
Design
Usability

best sound for the buck

March 15, 2011

I've been into Mb quart since '95,I've heard them at their best...and their worst. I purchased the onyx 4ch x 80w to replace a blown interior amp.i was kinda hesitant to get the (maxxsonics) mbquart amp,at first.but I went with the name brand I have grown to love,and trust. And I was blown away by the sound quality(crystal clear,uncolored highs, solid mid range,and bass reproduction) and the depth of the soundstage that was produced by this amp.paired with Mb quart speakers- you will be astounded by the low price but quality sound.hands down the most flexible, best 4ch amp I have owned to date. To sum it up-don't want to kill your pockets,but you demand great sound quality...THIS AMP IS BUILT FOR PEOPLE WHO LOVE GREAT SOUND....and I'm glad maxxsonics kept true to the name brand and the quality,associated with Mb quart

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JR

Van Nuys, CA

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Durability
Value
Features
Design
Usability

Great amp

June 26, 2014

This amp has a great sound at a good price....

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Jimmy

Morriston, FL

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Durability
Value
Features
Design
Usability

Great Value.

December 2, 2013

Amp puts out good power for price. I like the MB Quart amps for highs but the mono MB amps don't put out close to rated rms power.

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Lars

Groton, NY

Overall
Durability
Value
Features
Design
Usability

Awesome Amp At An Awesome Price

March 18, 2013

I love this amp, I have to say this amp came pretty highly recommended to me for my price range and I am glad I got it. The sound quality and power of this amp is great, makes my cheap walmart speakers sound good, which I had no idea they could. Looks great, easy to use, sounds great, cheap, doesn't get much better than that!

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Vaughn

Canada

Overall
Durability
Value
Features
Design
Usability

Good

March 4, 2013

Paired it with the onyx 1000.1d Great amps, don't heat up.

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M

bradenton, FL

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Value
Features
Design
Usability

Sounds great if you can find one that works...

March 1, 2013

Ordered this amp to complement my onx1500.1d, channels 3 and 4 were defective. Sonic sent it to MB Quart and delivered me a new one, unfortunately it was also defective. Maybe I just had bad luck... these amps DO sound good for the money, maybe run a little hot (a/b class), I am just tired of swapping out brand new amps... Again, if you can find one that works, good deal for the money.

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kj

omaha

Overall
Durability
Value
Features
Design
Usability

great 4 channel

February 14, 2013

I use this to power four infinity 3 way speakers and it works great. I am happy with this amp.

0 of 0 found this helpful

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Christian

Overland Park, KS

Overall
Durability
Value
Features
Design
Usability

Amazing Amp.

February 7, 2013

bought to keep up with my 2 15' obsidian audio subs on 2200 watts. i have them on 2 crescendo 6.5 mid range and 2 cadence tweets. if you set your gains and x overs correctly, this amp sounds amazing. would buy again in a heartbeat. and DOES NOT GET HOT IF YOU SET GAINS RIGHT. people just crank the gain all the way most of the time and you cannot do that. youre creating excess power and distortion causing excessive heat. buy this beatiful amp guys

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zica

Argentina

Overall
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Value
Features
Design
Usability

fuse mb quart onx 4.80

December 31, 2012

the official website of mb quart says that this amp has two 30 amp fuses and two 25 amp specifications as stated on this page are wrong

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Cody

Dalton, Ga

Overall
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Value
Features
Design
Usability

GREAT Amp

December 30, 2012

Upgraded from infinity reference components & 6x9's powered by a Sony XM-GTX6040 (60 watts to 4 channels) To this bad boy powering Focal's Access series components & 6x9's in my '06 Tiburon and its a MAJOR improvement. I thought my first setup sounded great but this beyond expectations for the money. Cant say much about the crossover settings though, ive got them wide open controlling the frequencies played with my EQ up front under my deck.

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Big tank

Temple, Ga

Overall
Durability
Value
Features
Design
Usability

Great amp

December 26, 2012

Excellent amp at a great price. I am running two sets of components with it.

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Aaron A.

Chandler, Arizona

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Durability
Value
Features
Design
Usability

Great amp for the money!

November 20, 2012

I hooked this amp up to a pair of Kenwood Components and this amp really makes them scream. It has great power output. It does get hot because of the A/B class but if you have a cooling fan on it you will be fine. Lots of settings make for good sound. Not too big, it will fit under most seats. Great design and easy to use. One of the best bang for the buck on this site!

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bigsweat

ney york

Overall
Durability
Value
Features
Design
Usability

great buy

October 16, 2012

had this amp a while running all my door speakers.This is a great amp and a great price.set the gains corrett and it shines.A++++

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Danny

Colorado

Overall
Durability
Value
Features
Design
Usability

MB Quart ONX 4.80

July 11, 2012

I have two of these pushing 3 sets of Polk Audio MM6501's.....these amps are great with awesome sound quality.....lots of power!! I give 5 stars cause the price is great, the look and design is sharp out of the box.....I have had them over a year the rest is user friendly.

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mickey

reno, NV

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Durability
Value
Features
Design
Usability

this is a great buy

February 28, 2012

Put it in 1994 4 runner 2 4" dcm 2 ways and 2 dcm 6x9s sound great no problems no over heating and we have it under the seat.

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mickey

reno, NV

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Durability
Value
Features
Design
Usability

this is a great buy

February 28, 2012

Put it in 1994 4 runner 2 4" dcm 2 ways and 2 dcm 6x9 sounds great no problems no over heating and we have it under the seat.

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charles

rochester, NY

Overall
Durability
Value
Features
Design
Usability

power and beauty

December 17, 2011

This amp is strong durable and beautiful. From its black piano finish to its powerful clean bass it puts out you will be happy. I loved it. I owned it for a year and was never dissapointed or let down. It never got hot clipped or shut off.

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Accessory Tools and Products

Accessories added

NVX XKIT44 4-Gauge 4-Channel Wiring Kit

4-Channel 100% OFC Complete True 4 Gauge Amp Kit with RCA Cables and Speaker Wire

Your Price $99.99

NVX XBG3PK 1/0 Gauge OFC Big 3 Upgrade Kit

Comes with everything you need to upgrade your power and ground wire.

Your Price $79.99

Kicker Big 3 Package 1/0 Gauge Big 3 Upgrade Kit

Get all you need including wire cutters to upgrade your power and ground wire.

Your Price $149.99

Belva BBG3KT CCA 1/0 Gauge Big Three Kit

Features everything needed to upgrade factory power and ground wire.

Your Price $39.99

Universal Remote Level Bass Control

Controls bass level and frequency via RCA/Interconnect connectors on any amp.

Your Price $7.99

Small Universal Remote Level Bass Control

The Scosche RLC is a smaller universal bass remote that connects via RCA inputs.

Your Price $11.99

StreetWires FB4

4 AWG / 4 Gauge Firewall Bushing

Your Price $6.95

NVX XDBU4 - Top of the Line!

Distribution Block with Two 1/0 or 4 AWG Inputs and Four 4 or 8 AWG Outputs

Your Price $17.99

Professional Installation for your Car Power Amplifier

Covers labor charges through our professional installer network.

Your Price $89.99

NVX XIV45 4-Channel RCA Audio Interconnect Cable

5 Meters (16.4 ft.) 4-Channel RCA Audio Interconnect Cable with Dual Twisted Pair Hyper-Flex Technology

Your Price $23.99

StreetWires ZN9 Series Interconnect Cable

16.4 ft. of 4-Channel RCA Cable with Rhodium-plated contacts and ZeroNoise construction for clear signal transfer!

Your Price $99.95

Kicker 4-Channel RCA Audio Interconnect Cable

4 Meters (13 ft.) 4-Channel K-Series RCA Audio Interconnect Cable

Your Price $19.95

NVX XWS1225 12 AWG Speaker Wire

25 ft. of True 12 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

Your Price $39.99

NVX XWS1625 16 AWG Speaker Wire

25 ft. of True 16 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

Your Price $13.99

Belva BBSW127 12 AWG Speaker Wire

12 Gauge 7 Meter (23 Ft) Speaker Wire (CCA)

Your Price $14.99

Belva BBSW167 16 AWG Speaker Wire

16 Gauge 7 Meter (23 Ft) Speaker Wire (CCA)

Your Price $12.99

Scosche SPL Meter SPL1000F

Handheld boomSTICK measures your SPL range from 60 to 135 dB

Your Price $21.99

AutoSound 2000 CD-102

High Frequency Test CD specifically designed for the set-up and evaluation of sound system imaging and placement.

Your Price $11.99

AutoSound 2000 CD-104

Audiophile reference series test disc for evaluation of all audio components.

Your Price $11.99

Product Summary

Manufacturer

Model Number

ONX4.80

UPC

806576217008

Weight

12.00lbs

Internal SKU

onx480

Internal Product ID

24110

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: MB Quart ONX4.80