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MB Quart REF4.50

400W RMS Reference Series 4-Channel Amplifier

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Reference Series 4-Channel Class A/B Car Amplifier • 400W RMS • 100W x 4-Chan @ 2 Ohm • Variable Bass Boost • Soft Start Turn-on • 4-Way System Protection Circuitry • Preamp RCA Outputs • MOSFET Power Supply

Learn more about the ref450

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This item has been discontinued


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Product Highlights


Reference Series 4-Channel Class A/B Car Amplifier • 400W RMS • 100W x 4-Chan @ 2 Ohm • Variable Bass Boost • Soft Start Turn-on • 4-Way System Protection Circuitry • Preamp RCA Outputs • MOSFET Power Supply

Description


MB Quart brand icon

Authorized dealer

  • Reference Series 4-Channel Class A/B Car Amplifier
  • RMS Power Rating:
    • 4 ohm: 50 watts x 4 chan.
    • 2 ohm: 100 watts x 4 chan.
    • Bridged, 4 ohm: 200 watts x 2 chan.
  • Pulse Width Modulated MOSFET power supply
  • LED power (blue) and protect (red) indicators
  • Variable Bass Boost (0 to +9 dB bass boost at 45 Hz)
  • Soft Start Turn-on
  • 4/3/2 channel operation
  • Preamp RCA outputs to daisy chain multiple amps
  • 4-Way System Protection circuitry (DC, thermal, overload, and speaker short protection)
  • Heavy duty aluminum alloy heatsink for extreme heat dissipation
  • Nickel-plated RCA level inputs
  • Nickel-plated screw terminals
  • Input sensitivity:
    • Level: 200mV-6V
  • Variable high-pass filter (15-250 Hz, 24 dB/octave)
  • Variable low-pass filter (30-250 Hz, 24 dB/octave)
  • Damping factor: >180
  • Frequency response: 15-45,000 Hz
  • Dimensions: 11-1/16"L x 7-3/4"W x 1-7/8"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

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Specifications & Details


Power Specifications - Full Range Channels
RMS Power @ 4 ohms
50 watts x 4 channel
RMS Power @ 2 ohms
100 watts x 4 channel
RMS Power @ 1 ohm
Not Stable
Bridged RMS Power
200 watts x 2 channel
Amplifier Specifications
Amplifier Class
A/B
Number of Channels
4-Channel
Total RMS Power Output
400 watts
Maximum Input Gauge Size
4 AWG
Minimum Impedance Unbridged
2 ohm
Minimum Impedance Bridged
4 ohms
THD at Rated RMS Power
<0.05%
Speaker Level Inputs
No
Preamp Outputs
1 pair
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
High-Pass Crossover Frequency
15 - 250 Hz
Low-Pass Crossover Frequency
30 - 250 Hz
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:

REF4.50

Weight:

7.73lbs

Internal SKU:

ref450

Internal Product ID:

25534

Product and How-to Videos


Customer Ratings & Reviews


MB Quart REF4.50 thumbnail image

5 star
100%
4 star
0%
3 star
0%
2 star
0%
1 star
0%



Durability
5
Value
5
Features
5
Design
5
Usability
5

Customer Reviews

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Yet to Install

This is my first amplifier buy off sonicelectronix.com, shipping was fast and product came in perfect condition. This this looks and feels great, feels solid and not cheap.

Notes:
-Power terminals will accept wire up to 5mm in diameter, I measured myself and that is an accurate measurement.
-Width with end caps: 11"
-Width without end caps : 9"

I'm going to rate 5 stars for now, because the only complaint I have, which is not even a big deal, but is that the gain/level/hpf/lpf/bass boost adjusters aren't flush with the side of the amp but instead are recessed about 2mm, I'll write another review of this amp after I install it and use it for a bit.

By Jeremy on February 16, 2013

12 found this helpful




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Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

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Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.