MB Quart® RM4404 - MYKRO Series Class D 4-Channel 440W Amplifier

MB Quart® RM4404 - MYKRO Series Class D 4-Channel 440W Amplifier
$ 229
In stock: 22 pcs.
Product Detail:

Max Power Rating 4 Ohms: 75W x 4 chan.
Max Power Rating 2 Ohms: 110W x 4 chan.
Max Power Rating Bridged, 4 Ohms: 220W x 2 chan.
Frequency Response: 10Hz - 20KHz
Input sensitivity: Level: 200mV-6V
Variable high-pass filter: 50-3000Hz 24 dB/octave
Variable low-pass filter (chan 3 & 4): 50-3000Hz 24 dB/octave
Frequency response: 10-20000Hz
Damping Factor: >200 dB
Signal to Noise Ratio: >90 dB
T.H.D. & Noise: < 0.02%
Channel Separration: > 80 dB
Variable Input Level Control: 0.2V - 6.0V
Input Impedance: 47 kOhms
Fuse Size: 25A x 2
Dimensions (L x W x H): 7.09" x 6.5" x 1.97"


  • Fluid-FETs MOSFET circuit maximizing power efficiency while improving sound quality
  • Q-Stasis Pre-amplifier stage for a cleaner signal from the source unit
  • Ultra low ESR high capacity power supply storage bank
  • Hybrid Class D Full range design for small footprint and exceptional sound quality
  • LED power (green) and protect (red) indicators
  • Built-in system diagnostics and top-mounted controls
  • 4/3/2/1 Channel operation
  • Preamp RCA outputs to daisy chain multiple amps
  • 4-way protection circuitry (thermal, overload, and speaker short protection, DC offset)
  • Extruded aluminum heatsink design

The 1960’s were an esoteric time in the audio world. Only the most discriminating music enthusiasts could embrace the components of the day, made only of wood and tubes. Founded during that decade, MB Quart® established itself as a key manufacturer of high quality audio parts. Throughout five decades and several technology revolutions from the days of ‘wood and tubes,’ MB Quart is still the global standard, creating only the finest high performance audio equipment. Founded in 1962, MB Quart began producing professional studio microphones and headphones at its headquarters in Obrigheim, Germany. Through research, innovation, and dedication to the highest standards of quality, MB Quart continued to grow its product line throughout its more than 50-year history.

Part Number:

Warranty Information

MB Qaurt warrants to the original purchaser that amplifiers are free from defects in material and workmanship for one (1) year from the date of purchase. All other parts and accessories of the system are warrantied to be free from defects in material and workmanship for one (1) year from the date of purchase. During the warranty period MB Qaurt will repair or replace, at it’s option, any system component that proves defective in materials and workmanship under normal installation, use and service provided that the product is returned to the authorized MB Qaurt dealer from where it was purchased. Any damage to the product as a result of misuse, abuse, accident, incorrect wiring, improper installation, alteration of date code or barcode labels, revolution, natural disaster, or any sneaky stuff because someone messed up, repair or alteration outside of the company’s factory or authorized service centers and anything else you have done that you should not have done is not covered. This warranty is limited to defective parts and specifically excludes any incidental or consequential damages connected therewith.

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Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

Vehicle Fitment

This part is universal
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Product Reviews


Every Customer can leave a review about our service and the product that was purchased. In order to leave your review for your new product, please follow the link in the email you receive after completing your purchase. You can rate appearance, ease of installation, price/value and product quality.

MB Quart® RM4404 - MYKRO Series Class D 4-Channel 440W Amplifier
Average Rating: 5 of 5
5 of 5
Impressed and Satisfied
MB Quart® - MYKRO Series Class D 4-Channel 440W Amplifier
I am very impressed with the overall operation of this amplifier. It provides plenty of power and the simplicity of running the whole system from one source. Very satisfied.
DPosted by Dennis (Roodhouse, IL) / December 9, 2013
2013 GMC Yukon
Was this review helpful for you? YesThis review was helpful for 0 user!
5 of 5
Cannot Be Beaten
This is an awesome amplifier and the price and the quality of MB Quart cannot be beaten. Great price for a great product. I have used it for 6 months and i still love it.
TPosted by Tim (Kimball, MN) / December 19, 2011
2000 Chevy Cavalier
Was this review helpful for you? YesThis review was helpful for 0 user!
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This part is universal

Delivery Information:

FAST and FREE Delivery in Toronto. Delivery time: up to 24 hours. Order by 2pm for Delivery Today.

FREE Delivery in Canada. Delivery time: 24-48 hours. Order by 3pm for Next Day Delivery.

FREE International Delivery Available. Delivery time: 2-6 working days.

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