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MB Quart ONX4.60

480W RMS, ONYX Series 4-Channel Amplifier (ONX-4.60)

Discontinued
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This item has been discontinued

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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: 60 watts x 4 chan.
    • 2 ohms: 120 watts x 4 chan.
    • Bridged, 4 ohms: 240 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: 13-11/16"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.

60 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.

120 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.

240 watts x 2 channels

Amplifier Specifications

Amplifier Series
This designates the series of the amplifier. Many amps are available in a litany of different wattage and channel configurations, but maintain consistent features throughout the product line.
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.

480 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

Specials with this Item

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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
80%
4 Star
10%
3 Star
10%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.6
Value
4.8
Features
4.8
Design
4.5
Usability
4.6
Randum

Orlando, FL

Overall
Durability
Value
Features
Design
Usability
Not Quite right for me.

February 28, 2013

The amp fit the right price, good power 120watts at 2ohms more than enough for my infinity reference components (90 watts rms) Seemed to have good build Quaility but i recieved an unclean signal while using the amp. no alternator whine or ground loop noise just an overall muddy sound. i checked ground and rcas which where both good. i just couldn't get it to sound crisp and clear. Components sounded better on the 20rms from the headunit alone. Maybe the ticket for some but not for me. Have a Polk Pa660 now and its crystal clear with less power!

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KC

Humble, TX

Overall
Durability
Value
Features
Design
Usability
Great

February 21, 2013

After I had this thing installed properly it makes my speakers that much better! I have it powering 4 infinity kappa 6x9 speakers and I would highly recommend this amp!

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Oshea

Grand Rapids, MI

Overall
Durability
Value
Features
Design
Usability
Works great for me

September 26, 2012

I really like this amp. After having bad luck with a couple of other brands, I went with this one. Loud and clear. No noise. The amp looks great, and includes a nice mb quart sticker, and a small cleaning cloth. The piano black is prone to fingerprints. The only con I can give is that if I push it hard for long enough, I get a faint burning electronics smell. I have never backed off the volume when I smell it, and I have never had any smoke associated with the smell. It could be some extra dielectric grease burning off. It has never gone into protection. Overall, I am very satisfied. It has decent power for the price.

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Michael

Canada

Overall
Durability
Value
Features
Design
Usability
Perfect Amp!

September 10, 2012

I just finished installing this amp to power my MB Quart ONX216 components and RF 12" Sub. All I can say is that it gives just the right amount of juice my speakers need. I was worried at first that it won't be enough to power everything since I had friends who had 4-channel Hifonics amps that would overheat and shut off after playing hard but this one I have no issues at all.

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steve

Bradford, PA

Overall
Durability
Value
Features
Design
Usability
Another Great MB Quart product!

July 17, 2012

I have owned several MB Quart products including this MB Quart ONX4.60 amp. I have the front 2 channels running my mids & highs and the rear channel bridged mono running a 15" Kicker Comp. Sub. Sounds Great, Great Product & Great Price!!!!

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Mark

Baton Rouge, LA

Overall
Durability
Value
Features
Design
Usability
Totally Awesome

April 2, 2012

I was really wanting to get the MB Quart REF 4.80 to drive my mids and highs, as I already have the MB Quart REF 1.800 driving my subs. Unfortunately, that amp has been discontinued. In my search, I ended up calling MB Quart directly to try and get this amp, as it was no longer offered for sale by Sonic. In speaking with them, they told me try one of their Authorized Online Retailers, and Sonic was first on their list. I mentioned to the CSR that I already tried Sonic and it was unavailable. I then called MB Quart up again, and they reccomended the ONYX 4.60 to meet my needs. My main concern was having a quality amplifier which was also CEA 2006 compliant. Sonic had this amplifier in stock, and with their Low Price garuantee, I was able to pick this great amp up for a great price. How great is that! I currently have this amplifier driving 2 sets of the MB Quart ONYX OTK-30 Widesphere Tweeters and 2 sets of the Rockford Fostgate Power Series T-1682 6 x 8 coaxials, all of which I picked up from Sonic at a great price also. Totally Awesome are the only words that I can come up with for this amp's perfomance on this set up, it really made my mids and highs come to life. It also relieved stress off my head unit's pre-amp to deliver a more full and true signal to my subs. The sound comparison of head unit powered vs. amped with the ONYX 4.60 is totally awesome. It is like the difference between night and day. Additionally, I added Dynamat to the speaker install and everything is controlled by a Pioneer AVH-P3300BT head unit to deliver 120 clean, clear, crisp RMS watts to these components. There is nothing negative regarding this amps perfomance, but MB Quart could have left the red chicklet logo unilluminated, as this does throw off the beautiful gloss black appearance of the amp. That doesn't really matter though, as this amp is built to perform, appeasing the ears, not the eyes. For my subs, I have 2 10" Alpine SWS-1023's driven by the MB Quart REF 1.800. Everyone is amazed when they look inside my F-250 Crew Cab, as they are expecting to see a whole gamut of speakers and amps, but they are surprised to see that everything looks stock with the exception of the head unit! When everyone asks "How did you do it?" I just say Sonic! and I'm not talking about the drive-in either, LOL. Thanks SonicElectronix.com!

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LINK

Minnesota

Overall
Durability
Value
Features
Design
Usability
good buyy

September 11, 2011

I have this amp running my Rockford fosgate power series component speakers. And they sound loud and clear! I have to turn the gain only half way up! Before the sound is piercing!

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Jake

Bend, Oregon

Overall
Durability
Value
Features
Design
Usability
Absolutly amazing product

July 14, 2011

I was very skeptical about this amp because MB Quart used to be a great company until maxxsonics got ahold of it. All of mb quarts products are still good as long as you get a good batch. Anyways, this amp is absolutely amazing! It sounds beautiful powering my 4 Rockford Fosgate p152 coaxials in my jeep cheeokee Xj. It powers them perfectly and has rich mids, crisp highs and clean clear mid bass. Amazing bang for your buck! And goes beautifully with my RE Audio SEX10d4 and MB Quart ONX1.1000d. Looks great but the light just kills the nice glossy black look. These amps have a lot of setting to tune to your personal preference. Overall great product!

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Doug

Spring, TX

Overall
Durability
Value
Features
Design
Usability
After I bought this, every amp I've bought has been an MB Quart

March 15, 2011

MB quart has done a great job with the Onyx line, and this amp is no exception, even though its not CEA compliant. The ratings are true, and from hooking it up to a friends speakers, i'm pretty sure it can put out 70+ if properly tuned on a good day. My only gripes are that the angled terminals are kind of a pain to use once you mount the amp, and the 4AWG terminals are 4AWG, exactly, there is no extra room for wire in there, and the light blows the classy piano black scheme

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tomas

austin, TX

Overall
Durability
Value
Features
Design
Usability
Great

February 21, 2011

Used this amp for a sound upgrade in my boat, drives pair of 6.5 Polk components and one Polk 10" sub. Sound is loud and clear.

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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 $59.99

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 $151.99

Belva BBG3KT CCA 1/0 Gauge Big Three Kit

Features everything needed to upgrade factory power and ground wire.

Your Price $39.99

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

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

NVX XIX45 X-Series RCA Interconnect Cable

16.4 ft. of 4-Channel X-Series RCA Cable with Dual Twisted Pair Hyper-Flex Technology

Your Price $34.99

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 XWS1250 Speaker Wire

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

Your Price $29.99

Belva BBSW167 16 AWG Speaker Wire

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

Your Price $12.99

The Install Bay IB-CAP1F

True 1.0 Farad Car Audio Capacitor for up to 1000W Max

Your Price $37.99

e2 ECAP1 by Scosche - Mid-Level 1 Farad

Digital 1.0 Farad Car Audio Capacitor for up to 1000W Max

Your Price $49.99

Rockford Fosgate RFC1D - Top of the Line 1 Farad

Digital 1.0 Farad Car Audio Capacitor for up to 1000W Max

Your Price $99.99

Scosche SPL Meter SPL1000F

Handheld boomSTICK measures your SPL range from 60 to 135 dB

Your Price $21.99

Browse 1 question and 1 answer
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Why did you choose this?
Sonic Electronix Store
Use MB quart in the past. Very good product.
carlos v on Aug 1, 2014

Product Summary

Manufacturer

Model Number

ONX4.60

UPC

806576216995

Weight

9.00lbs

Internal SKU

onx460

Internal Product ID

23877

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 ONX4.60