Garage
Shop

MB Quart RA400.2

400W Max 2-Channel Reference Series Class SQ Stereo/Bridgeable Power Amplifier (RA4002)

MB Quart
Shop all MB Quart
Product videos
highlight-star-icon

• 100W x 2 Chan. @ 4 ohms
• 200W x 2 Chan. @ 2 ohms
• 400W x 1 Chan. @ 4 ohms
• 3-Way System Protection
• 2/1 Channel Operation
• 8 Gauge Power and Ground Inputs
• FLUID-FETS Circuit for Smooth Sound Quality

Learn more about the ra4002

We apologize

This item has been discontinued

Product Highlights


• 100W x 2 Chan. @ 4 ohms
• 200W x 2 Chan. @ 2 ohms
• 400W x 1 Chan. @ 4 ohms
• 3-Way System Protection
• 2/1 Channel Operation
• 8 Gauge Power and Ground Inputs
• FLUID-FETS Circuit for Smooth Sound Quality

Description


MB Quart brand icon

Authorized dealer

General Features:

  • Reference Series 2-Channel Class SQ Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 100 watts x 2 chan.
    • 2 ohms: 200 watts x 2 chan.
    • Bridged, 4 ohms: 400 watts x 1 chan.
  • FLUID-FETS MOSFET Circuit maximizing power efficiency while improving sound quality
  • LED power (green) and protect (red) indicators
  • Variable Bass Boost (0 to +12 dB bass boost)
  • Built-in system diagnostics and top-mounted controls
  • 2/1 Channel operation
  • Preamp RCA outputs to daisy chain multiple amps
  • 3-way protection circuitry (thermal, overload, and speaker short protection)
  • Black reference aluminum alloy heat-sink with illuminated MB Quart design
  • Input sensitivity:
    • Level: 200mV-6V
  • Variable high-pass filter (60-1,200 Hz)
  • Variable low-pass filter (30-250 Hz)
  • Frequency response: 30-45,000 Hz
  • 8 gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier.
  • Dimensions: 8-1/4"W x 11-3/16"D x 2-3/8"H
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Specifications & Details


Power Specifications - Full Range Channels
RMS Power @ 4 ohms
100 watts x 2 channel
RMS Power @ 2 ohms
200 watts x 2 channel
Bridged RMS Power
400 watts x 1 channel
Amplifier Specifications
Series
Reference Series
Amplifier Class
SQ
Number of Channels
2-Channel
Total RMS Power Output
400 watts
Maximum Input Gauge Size
8 AWG
Minimum Impedance Unbridged
2 ohms
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
60 - 1200 Hz
Low-Pass Crossover Frequency
30 - 250 Hz
Signal-to-Noise Ratio
92 dB
Channel Separation
80 dB
Bass Boost
0 - 12 dB
Remote bass/level controller
No
Fuse Rating
20A x 2 
Strappable
No
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

RA400.2

Weight:

6.50lbs

Internal SKU:

ra4002

Internal Product ID:

67875

Product and How-to Videos


Customer Ratings & Reviews



5 star
71%
4 star
14%
3 star
0%
2 star
0%
1 star
14%



Durability
4.5
Value
4.5
Features
4.3
Design
4.3
Usability
4.3

Customer Reviews

Sort by:

Loading...

Great Amp! Great Features! Great Price!

I have owned & purchaed several MB Quart amps from Sonic Electronix! I like MB Quarts quality, ease of use features & great price for the amount of power. I bridged this amp running mono to a 12" Kicker Solo-Baric L3 running 400 watts RMS & sounds great inside the ported 12" square MDF (Prod.#1SVK12) box. I would recommend this to anyone who wants to add some bass to their system.

By Steve on May 28, 2013

21

found this helpful.

MB Quart RA400.2

This amp rocks in both style and function. I have it bridged on a RF R2D2-10 and it is KILLING it!! The built in sub sonic control is sweet and lets you dial in the punch you want. I would recommend this amp to anyone looking for style and performance.

By David on May 28, 2013

21

found this helpful.

Overheats under light load

I would not recommend this amp. I've had a elemental designs amp for 7 years before it gave out. I bought this as a replacement. It paired up well for what I was going to use it for. I'm powering a 400w rms sub @ 4 ohms. I installed it in a well ventalated area and when I had a song with loud bass it overheated. I wasn't really even pushing it that hard. It does have a protect feature but it gets far too hot under load.

By Erik on January 24, 2014

21

found this helpful.

Small amp good power great sound

I put this amp in my boat and it's pushing a 10" jl wov3. Great sound good output. I would like more bass but its more than I expected out of the sub

By Ryan on September 17, 2013

18

found this helpful.

Great value for the quality amp

Rock solid bass out of my single MB QUART 12" sub. Very clean low bass. Highly recommend.

By Dan on May 17, 2015

9

found this helpful.

Great product, fast delivery

Great product, sounds great. I would recommend this product to anyone.

By Chino on May 21, 2015

7

found this helpful.

Great product

Great sound at affordable price and it makes my car my perfect sound machine

By Anonymous on June 21, 2019

3

found this helpful.

Add-ons


Similar Products

Best selling similar products

JL Audio XD200/2v2

• 75 watts x 2 channel @ 4 ohms
• 100 watts x 2 channel @ 2 ohms
• Bridged: 200 watts x 1 channel @ 4 ohms
• Total RMS Power: 200 watts
• Class D 2 ohms Stable 2-Channel Amplifier

(6)

$199.99

Taramps DS 800x2

• 250 watts x 2 channel @ 4 ohms
• 400 watts x 2 channel @ 2 ohms
• Bridged: 800 watts x 1 channel @ 4 ohms
• Total RMS Power: 800 watts
• Class D 2 ohms Stable 2-Channel-Channel Amplifier

$224.00

Hertz HCP2

• 65 Watts RMS x 2 @ 4 ohms
• 100 Watts RMS x 2 @ 2 ohms
• CEA-2006 Compliant
• Refined Heatsink with High Convection Capability
• Automatic Remote Turn-On/Off function
• Dimensions: 8.46" x 7.48" x 1.97"

$199.99

Hertz DPower 4

• 50 watts x 4 channel @ 4 ohms
• 65 watts x 4 channel @ 2 ohms
• Bridged: 130 watts x 2 channel @ 4 ohms
• Total RMS Power: 300 watts
• Class D 2 ohms Stable 4-Channel Amplifier

$279.99

Rockford Fosgate M2-200X2

• 50 watts x 2 channel @ 4 ohms
• 100 watts x 2 channel @ 2 ohms
• Bridged: 200 watts x 1 channel @ 4 ohms
• Total RMS Power: 200 watts
• Class D 2 ohms Stable 2-Channel Amplifier

$219.99

Related Searches


RA400.2 small

Item added to your cart.

Price: $79.99

Essential add-ons
Belva BAK82

Complete 8 Gauge Amplifier Wiring Kit with 2-Channel RCA Interconnects

$49.99

$29.99

Add to cart
Belva BAK82BL

Complete 8 Gauge Amplifier Wiring Kit with 2-Channel RCA Interconnects

$49.99

$24.99

Add to cart
Stinger SSK8

Complete 8 Gauge Amplifier Wiring Kit with 2-Channel RCA Interconnects

$31.00

$19.99

Add to cart
Stinger SS600XS

Complete 8 Gauge Amplifier Wiring Kit with 2-Channel RCA Interconnects

$65.00

$29.95

Add to cart
Stinger SK4681

8 Gauge Amplifier Wiring Kit with 2-Channel RCA Interconnects

$89.00

$42.99

Add to cart
Stinger SK6681

Complete 8 Gauge Amplifier Wiring Kit with 2-Channel RCA Interconnects

$125.00

$63.99

Add to cart
Kicker 47VK8

Complete 8 Gauge Amplifier Wiring Kit with 2-Channel RCA Interconnects

$59.99

$59.99

Add to cart
Belva BPK8

8 Gauge Premium (CCA) Copper Clad Aluminum Amplifier Power Wiring Kit with Speaker Wire

$39.99

$19.99

Add to cart
Stinger SK4281

8 Gauge Power Amplifier Installation Kit

$69.00

$33.99

Add to cart
StreetWires ZN1K-08

8 Gauge Amplifier Power Installation Kit

$43.95

$39.95

Add to cart
Stinger SK6281

8 Gauge Power Amplifier Installation Kit

$83.00

$42.99

Add to cart
NVX Remote Level Bass Control with Digital Voltmeter

Controls bass level and frequency and monitor voltage

$99.99

$29.99

Add to cart
NVX XBRC

Universal Remote Level Bass Control

$9.99

$7.99

Add to cart
Universal Remote Bass Level Control Knob

Flush Mount & Universal via RCA. Works with any amp, controls your bass output

$14.99

$7.99

Add to cart
PAC LP7-2

L.O.C. PRO Series 2-Channel Line Output Converter with Remote Turn On

$39.00

$24.99

Add to cart
NVX XMICROLOC2

Add a 2-Channel amp without replacing your factory radio

$18.49

$14.99

Add to cart
NVX XFLOC2

80W 2-Channel Line Output Converter with Digital Noise Filter + Line Driver

$18.74

$14.99

Add to cart
NVX XBBR2

Looking to fine tune the bass in your vehicle? Look no further

$149.99

$69.99

Add to cart
NVX XIV25 V-Series 2-Channel RCA Cable

16.4 ft 2-Channel RCA Audio Interconnect Cable with Twisted Pair Construction

$18.99

$12.99

Add to cart
NVX XWS1625 Speaker Wire

25 ft. of True 16 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

$29.99

$19.99

Add to cart
16 Gauge 7 Meter (23 Ft) Speaker Wire (CCA)

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

$24.99

$12.99

Add to cart
80 Amp Smart Relay Isolator (XSBI80)

Smart isolator - Monitors and auto-charging feature!

$49.99

$24.99

Add to cart
80 Amp Relay Isolator (BIR80)

Great for isolating a second batter making it dedicated to the stereo system

$19.99

$14.99

Add to cart
200 Amp Smart Relay Isolator (XSBI200)

Smart isolator - Monitors and auto-charging feature!

$79.99

$54.99

Add to cart
500 Amp Smart Relay Isolator (XSBI500)

Smart isolator - Monitors and auto-charging feature!

$99.99

$74.99

Add to cart
500 Amp Relay Isolator (BIR500)

Does not create a voltage drop to the second battery like conventional isolators

$89.99

$65.99

Add to cart
NVX XCAP1F

True 1.0 Farad 20V Capacitor with Digital Read-out, Built-in Distribution Block

$124.99

$89.99

Add to cart
Belva BB1D

1.0 Farad Capacitor with Digital Red Display for up to 1000W Max

$79.99

$34.95

Add to cart
Belva Nine Function Digital Multimeter

Perfect for any installation and troubleshooting

$29.99

$9.99

Add to cart
Six Function Digital Multimeter

Perfect for every toolbox

$14.99

$6.99

Add to cart
Steve Meade Designs IM-SG

Impedance Meter / Signal Generator

$461.99

$451.99

Add to cart
SMD DD-1 Distortion Detector

Set your gains like a Pro, accurately and quickly

$207.99

$199.99

Add to cart
SMD CC-1 Crossover Calibrator

This is a must have! Set your crossover frequency like a Pro

$195.99

$192.99

Add to cart
World's Smallest AFS / Mini ANL Fuse Holder

Accepts 4 gauge or 8-gauge wire

$19.99

$10.99

Add to cart
4/8 Gauge Mini ANL (MANL, AFS) Fuse Holder

4/8 Gauge Mini ANL (MANL, AFS) Fuse Holder

$9.99

$6.99

Add to cart
High Quality Element Resistant AGU Fuse Holder

Belva BAGUH2 AGU Fuse Holder

$9.99

$4.99

Add to cart
4/8 Gauge AGU Fuse Holder

4/8 Gauge AGU Fuse Holder

$9.99

$6.99

Add to cart
Modular Linkable ANL Fuse Block

Modular Linkable ANL Fuse Block

$59.99

$16.99

Add to cart
4/8 Gauge Mini-ANL/MANL/AFS Fuse Holder

4/8 Gauge Mini-ANL/MANL/AFS Fuse Holder

$9.99

$8.99

Add to cart
4 Pack of 80 Amp Nickel-Plated MANL Fuse

Mini-ANL (MANL/AFS) 80A Nickel Plated Fuses

$8.99

$3.99

Add to cart
4 Pack of 100 Amp Nickel-Plated MANL Fuse

Mini-ANL (MANL/AFS) 100A Nickel Plated Fuses

$8.99

$3.99

Add to cart
2 Pack of 100 Amp Nickel-Plated ANL Fuse

ANL 100A Nickel plated for better power transfer

$7.99

$3.99

Add to cart
2 Pack of 200 Amp Nickel-Plated ANL Fuse

Two fuses per order. High quality 200 Amp ANL Fuses

$7.99

$3.99

Add to cart
2 Pack of 300 Amp Nickel-Plated ANL Fuse

Two fuses per order. High quality 300 Amp ANL Fuses

$7.99

$3.99

Add to cart
Pair of 8 Gauge Spade Terminals, #8 Opening

Spade Terminals • 8 Gauge • 1 Red & 1 Black • Nickel Plated

$9.99

$2.49

Add to cart
8 Gauge Ring Terminals, 5/16" Opening

Nickel Plated Brass - 5 Pieces (3 Red & 2 Black)

$7.99

$2.99

Add to cart
NVX VUBT2

Universal Bluetooth Audio Receiver

$49.99

$39.99

Add to cart
Marine Grade Bluetooth Audio Controller/Receiver

Marine Grade Bluetooth Audio Controller/Receiver

$62.49

$48.99

Add to cart
NVX XUBT3

Universal Bluetooth Audio Receiver & Volume/Playback Controller Knob

$99.99

$59.99

Add to cart
Save up to 10 different vehicles in your garage

Loading...
Identify your vehicle and submodel details
  • Owner’s manual
  • Vehicle’s insurance card
  • Vehicle registration
  • Vehicle produced after 2005: Inside driver’s side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
Car Info Side Door Icon
Vehicle Registration Icon
Vehicle Insurance Icon