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MB Quart FX4.70

560W RMS, 4-Channel Formula Series Amplifier

MB Quart
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Formula Series 4-Channel Class A/B Car Amplifier • 70W at 4 Ohms • 140W at 2 Ohms • PWM MOSFET Power Supply • Variable High Pass Filter • Variable Low Pass Filer • Variable Bass Boost • 4 Way Protection Circuitry

Learn more about the fx470

We apologize

This item has been discontinued

Product Highlights


Formula Series 4-Channel Class A/B Car Amplifier • 70W at 4 Ohms • 140W at 2 Ohms • PWM MOSFET Power Supply • Variable High Pass Filter • Variable Low Pass Filer • Variable Bass Boost • 4 Way Protection Circuitry

Description


MB Quart brand icon

Authorized dealer

MB Quart FX4.70 Features:
  • Formula Series 4-Channel Class A/B Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 70 watts x 4 chan.
    • 2 ohms: 140 watts x 4 chan.
    • Bridged, 4 ohms: 280 watts x 2 chan
  • PWM (Pulse Width Modulated) MOSFET power supply
  • LED power (green) and protect (red) indicators
  • Variable Bass Boost (0 to +9 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)
  • 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: 90dB
  • Channel separation: 80dB
  • Variable low-pass filter: 30-150 Hz
  • Variable high-pass filer: 10-1200 Hx
  • LP/HP/Full crossover switch
  • Damping factor: >180
  • Frequency response: 10-45,000 Hz
  • Dimensions: 12-3/4"L x 9-1/2"W x 2-1/4"H
  • 8-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

Specifications & Details


Power Specifications - Full Range Channels
RMS Power @ 4 ohms
70 watts x 4 channel
RMS Power @ 2 ohms
140 watts x 4 channel
RMS Power @ 1 ohm
Not Stable
Bridged RMS Power
280 watts x 2 channel
Amplifier Specifications
Amplifier Class
A/B
Number of Channels
4-Channel
Total Peak Power Output
Not Specified
Total RMS Power Output
560 watts
Maximum Input Gauge Size
8 AWG
Minimum Impedance Unbridged
2 ohms
Minimum Impedance Bridged
4 ohms
THD at Rated RMS Power
.05%
Speaker Level Inputs
No
Preamp Outputs
No
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
Full (AP)
High-Pass Crossover Frequency
10 - 1200 Hz
Low-Pass Crossover Frequency
30 - 150 Hz
Subsonic Filter
Not Specified
Signal-to-Noise Ratio
90 dB
Channel Separation
80 dB
Bass Boost
0 - 9 dB
Remote bass/level controller
No
Fuse Rating
20A x 2 
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

FX4.70

Weight:

9.00lbs

Internal SKU:

fx470

Internal Product ID:

33004

Product and How-to Videos


Customer Ratings & Reviews



5 star
57%
4 star
29%
3 star
0%
2 star
14%
1 star
0%



Durability
4.2
Value
4.6
Features
4.3
Design
4
Usability
4.6

Customer Reviews

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Great Amplifier!!

Best ever had, great power, great sound for the speakers and the original radio I used; cassette BMW M3 Radio, and it sounds as any new radio. Love my amplifier, will recommend.

By hk on October 17, 2012

8

found this helpful.

Good buy

Excellent value for money, very good power output, clean channels and easy to use

By Dev on August 31, 2012

6

found this helpful.

Fantastic sound

I had a Kenwood KAC-8405 used from ebay that only lasted 6 months, after that bad experience I decided to give a chance to the MB Quart FX4.70 and I have to say that I am amazed of the quality. The sound is just amazing and much better than the Kenwood, highs are detailed and crisps, mid and low end bass amazing too.
If you are somebody like me that cannot expend hundreds and hundreds of dollars in a system but like to enjoy hi-fi sound this is the amplifier to try.
I have mine connected to the stock head unit of my Saab 93 and I really do not see a need to upgrade the head unit at all, the sound is detailed, accurate and extremely hi-fi to my standards

By MCFL on December 3, 2012

5

found this helpful.

Just as planned :D

I purchased this for my MB Quart components and it is solid. Still works very well and as long as you do not abuse electronics, they will last forever. The clarity is audible and with the right lossless formatting, this amp will shine. It has a great amount of filters and options for virtually any set of speakers on the market. For the price, this is really a great product.

By Mobile Enclosures on September 24, 2012

6

found this helpful.

Very Happy

Extremely happy with this amp. For the price and power nothing else can touch it. I have the amp powering 4 Infinity Kappa 682.9cf 6x8 door speakers @ 2ohms.
The speakers are actually only rated for 100w rms per channel but I am pushing them with this amp @ the manufacturer stated 140w rms (in all actuality it's probably closer to 120). I'm confident that if I was using a cheaper quality amp I wouldn't be able to push the speakers that hard without risking some damage. I am getting nice bright highs, decent mids and some fantastic bass from the speakers. Would recommend this amp for your setup without hesitation.

By Jason on September 15, 2012

5

found this helpful.

great, clean, powerful amplifier

I was sceptacle about buying an amplifier that wasnt cea rated, i looked at the fuse rating and new it wouldnt do the 70 watts per cannel it says. but this amp easily does 50 watts per channel at 4 ohms of clean, undistorted signal, i was very surprised at the quality of the sound that came from this amp, even at high volumes. i got 6 speakers running off this thing and soon to be 8, and this amp sounds amazing for the price, u couldnt get a better deal.

some cons are the crossovers arent that accurate on this amp, so u gotta play around with them for a bit, but they still work great once u found the spot u want it at.

By Tyler on September 2, 2012

4

found this helpful.

not as good as it seems

I've had one of these for less than a year and already it is completely useless. Sound cuts in and out every 5 seconds or just doesn't work at all, never going with MB Quart again.

By Thomas on February 14, 2013

3

found this helpful.

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