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MB Quart FX1.400

400W RMS 1-Channel Monoblock Formula Series Amplifier

Discontinued
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This item has been discontinued

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MB Quart FX1.400 Features:
  • Formula Series Monoblock Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 200 watts x 1 chan.
    • 2 ohms: 400 watts x 1 chan.
  • PWM (Pulse Width Modulated) MOSFET power supply
  • MB QR-2 Wired remote bass level control included
  • LED power (green) and protect (red) indicators
  • Variable Bass Boost (0 to +9 dB bass boost at 45 Hz
  • Mono channel operation
  • Dual speaker terminals simplify the hookup of multiple speakers
  • Preamp RCA outputs to daisy chain multiple amps
  • 4-Way System Protection circuitry (DC, thermal, overload, and speaker short protection)
  • 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
  • Signal to noise ratio: 95dB
  • Channel separation: 85dB
  • Variable low-pass filter: 40-300 Hz
  • Subsonic filter: 10-40 Hz
  • Damping factor: >200
  • Frequency response: 10-300 Hz
  • Dimensions: 10-13/16"L x 9-1/2"W x 2-1/4"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 - Subwoofer Channel

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 speaker(s) or subwoofer(s) 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. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
200 watts x 1 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 speaker(s) or subwoofer(s) 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. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
400 watts x 1 channels
RMS Power @ 1 ohm
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 speaker(s) or subwoofer(s) equals 1 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. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
Not Specified
Peak Power Output
This form of power rating refers to the maximum amount of power an electronic device can handle or output in an instant without damage. Often times this maximum is achieved during a brief musical burst, such as a drum accent or low bass hit. Some manufacturers display peak power ratings on the face of their products to increase the appeal to consumers. The RMS power rating is more accurate, and we recommend using it for product comparison. This is the peak power output for the amplifier's 5th channel.
Not Specified

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.
1 - Mono
Total Peak Power Output
The total peak power output is measured as the wattage per channel multiplied by the number of channels, and is calculated at the lowest level of operating impedance.

It is measured during a brief musical burst, such as a sudden drum accent. Some manufacturers display peak power ratings on the face of their products to increase the appeal.

The RMS power rating is more accurate, and we recommend using it for product comparison.

Not Specified
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.

400 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.
Not Bridgeable
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.
0.1%
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.
Mono output
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)
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.

40 - 300 Hz
Subsonic Filter
Allows you to block (filter) ultra-low frequencies that your subs cannot reproduce.
10 - 40 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.
95 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.
85 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.
Yes
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.
15A 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.

No
Strappable
Some amplifiers can be "strapped" together in order to increase the output of a single audio channel. These amplifiers feature RCA preamp outputs, allowing you to pass the signal directly from one amp to the other to ensure consistency.

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
63%
4 Star
38%
3 Star
0%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.4
Value
4.8
Features
4.4
Design
4.4
Usability
5.0
Eric

Manalapan, NJ

Overall
Durability
Value
Features
Design
Usability
Solid Product!!!

December 23, 2012

This is a great amp that im using to power my image dynamics ctx104 sub and i have no complaints at all. this amp gives a solid amount of good, clean power

0 of 0 found this helpful

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Duane

Damascus, OR

Overall
Durability
Value
Features
Design
Usability
I would do it again

October 11, 2012

Bought this to run a single sub in my wife's Liberty not for hard bass but just to round it out. That was a present last christmas and it has done great. It's now in a new Escape, but has fit just fine under the front seat of both vehicles. It was running an Audiobahn Natural Series in a sealed box before, now a Terminator TN12 also sealed. Does the job. Sounds clean, just enough features, probably pretty accurate in its ratings. Overall a good value I would say.

0 of 0 found this helpful

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LaSquisha Jones

Charlotte NC

Overall
Durability
Value
Features
Design
Usability
sweet deal

April 30, 2012

Running this amp in a 98 s10, paired with a baby kicker cvt8, and I do declare. Didn't expect it to give such a clean range for its price. The amp isn't even at half gain when I'm pushing the subwoofer to its peak! I will no doubt be buying from MB Quart in the near future. I highly recommend this item to anyone who is looking for an amp that won't drain your wallet, yet can still able to compete with amps twice as much, if not more. All Pros and no cons as to date.

0 of 0 found this helpful

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Jordan

El Paso, TX

Overall
Durability
Value
Features
Design
Usability
Great for the price

April 29, 2012

Bought this 6 months as a starter amp and I have loved it so far. I started with a kicker comp10 and after a month decided to add a second one. I still have to keep the gains a little low but the bass is great.

0 of 0 found this helpful

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nathan

APO, AP

Overall
Durability
Value
Features
Design
Usability
Great amp for the price!

March 21, 2012

I had this amp pushing 1 Powerbass XL12. It's not going to rattle your trunk open, you may not even hear it outside the car, but it was enough power to balance out the system. Great addition to high's/mid's driven only by a head unit.

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John

Philadelphia, PA

Overall
Durability
Value
Features
Design
Usability
Nonstop power.

March 13, 2012

Great product that hooked up to Orion XTR sub, and have never stop working because of using too much. Great price with great sounds.

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Edward

Bossier City, LA

Overall
Durability
Value
Features
Design
Usability
Decent Performer for the Price

September 13, 2011

This is my first experience with an MB Quart product. I've used either Kicker or Rockford Fosgate up to now. The amp is well built on the outside. Time will tell how the inside holds up. Two things about the amp. The first is the info page/owners manual says the bass boost is 0-12db. It's only 0-9db. The picture on Sonic's website of the amp is accurate. Even MB Quart's website lists it at 0-12db. The second thing is the wired bass control. When you plug it in you loose approximately 20-25% of the volume, like you turned off a loudness button or it's equivalent. Given that downside, I unplugged it. Kind of disappointing since I was hoping to use it to control the differences in bass response between sources (FM, CD's and XM radio). Guess I can always use the tried and true method of using the audio system bass control to increase/decrease the bass. Other than those two quirks, the amp performs well pushing a single 10" Rockford Fosgate P1 SVC 4 ohm sub mounted in a .68 cu.ft. enclosure located in the trunk of a 2011 Sonata. Not earth shattering, but deep and rich with no noticable clipping. Still trying to get it dialed in and find the right balance that satisfies each source since the wired bass control was lacking. In my setup it's pushing 200 watts. I may add a second 10" RF with a dual enclosure and play around with it at the current 4 ohm 200 watt configuration, or drop it to 2 ohms and try it at 400 watts. Bottom line, in spite of the two negatives, for under $100 this amp would be hard to beat.

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Ian

Pleasanton, CA

Overall
Durability
Value
Features
Design
Usability
Very Nice

July 17, 2011

Paired this amp with a JBL GTO804 in a '55 chevy; outstanding quality and filled the entire cab with no strain. Mounts pretty much anywhere you need it to.

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Accessory Tools and Products

Accessories added

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 $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

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

Kicker KI24 K-Series RCA Audio Interconnect Cable

4 Meters (13 ft.) 2-Channel K-Series RCA Audio Interconnect Cable

Your Price $16.95

NVX XIV25 V-Series 2-Channel RCA Cable

16.4 ft of V-Series 2-Channel RCA Audio Premium Interconnect Cable with Dual Twisted Pair Hyper-Flex Technology

Your Price $11.99

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

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 $104.99

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

Browse 2 questions and 2 answers
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How do I get my MB Quart FX 1.4000 amp from 4 ohms to 2 ohms to get the 400 watt output? I am using a 1000 watt Audio Pipe 10 inch speaker.
Fingers KGB on Sep 8, 2014
Best Answer: Hello Ricard,

There isn't anything you can Physically do to the amplifier to drop the impedance it sees. The Final Load is determined by the Speaker you wish to hook up to the amp. If said speaker is a 4ohm speaker, then the amp will see 4ohms. If the speaker is a 2ohm speaker, then the amp will see 2ohm.
Furthermore, you specified a 10" "speaker", but I assume you mean a Subwoofer. Subwoofers are typically configured differently from speakers, and can often times be wired a certain way to change the Final Load. I cannot tell you how to do that, however, sense you did not provide a proper model number of the Subwoofer. Please forward you inquiry to [email protected] when you have the proper information.
Reply · Report · Customer SStaff on Sep 8, 2014
· Add Answer · I Have This Question Too (0)
which speaker outputs do i use to hook up 1 sub on this MB Quart FX1.400 Amp?
lildude on Aug 20, 2014
Best Answer: Hello Farrel,

The MB Quart FX1.400 is a traditional Monoblock - DESPITE the multiple outs. Therefore, you are to assume that leads come together inside. All that means to you; You can use Whatever outputs you want, AS LONG as its One Positive (+) & One Negative (-) .
Reply (2) · Report · Customer SStaff on Aug 20, 2014
· Add Answer · I Have This Question Too (0)

Product Summary

Manufacturer

Model Number

FX1.400

UPC

806576218012

Weight

7.50lbs

Internal SKU

fx1400

Internal Product ID

33006

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 FX1.400