1.888.955.6000
crutchfield.com
Crutchfield

Brax Matrix MX-4B

4-channel car amplifier — 280 watts RMS x 4

Save 50% on a select amp wiring kit with any $249+ car amplifier with any $249+ car amplifier
Zoom
  • Brax Matrix MX-4B

    Front

Crutchfield OMC logo
We don't check this item for fit or compatibility.
 

Our take on the Brax Matrix MX-4B

by Buck Pomerantz

My system has plenty of power. Who needs an amp?

You might think you don't need an amp because you have a 400-watt system in your car, or because your new stereo puts out 50 watts a channel. But those are peak wattage ratings, which may boil down to 15 or 20 watts per channel, using the more realistic RMS rating. An amp sends your speakers the power they need to deliver your music with clarity and impact, whether you're using factory speakers or high-performance components. And low-frequency reproduction requires lots of power, so an amp is an absolute must if you're adding a sub to your system.

Luxury sound

If you want the best possible car audio system with no compromises in sound quality, then Brax's Matrix MX-4B 4-channel amplifier should be powering your music. This gorgeous, hand-crafted powerhouse brings an unprecedented level of high-fidelity amplification into the mobile environment. The versatile MX-4B can put out 280 watts RMS to each of your four high-performance speakers or components, at impedances from 1 to 4 ohms. Bridged for 2-channel operation, the MX-4B can put out 560 watts RMS each to a pair of subwoofers.

Build quality that's off the charts

The massive heatsink tells you right away that this is a serious amp. Inside, the multi-layered circuit board is laid out in short, dedicated signal paths to deliver only the purest signal in the fastest time. Brax uses silver solder to secure each discretely mounted component for the best conductivity possible between them. Gold-plated connections eliminate corrosion to keep the signal flowing freely in or out of this amplifier.

Hi-fi features

Because handling music properly takes such a delicate touch, you won't find any crossover filters or bass boosts in this amp to color or sidetrack the sound from its final destination. Two separate power supplies ensure stability and dependability. The output power transistors have been hand-selected and measured to match each other so your music will sound consistent and strong. You'll want to display this amp proudly in your system. Hand-made in Germany, each MX-4B amplifier comes with its serial number custom milled into the top nameplate.

Highlights:

  • 4-channel car amplifier
  • 280 watts RMS x 4 at 1 to 4 ohms
  • 560 watts RMS x 2 at 2 to 4 ohms
  • Class AB amp technology
  • 24-karat gold-plated RCA input, power, and speaker connections
  • double-sided circuit boards with silver-soldered components
  • hand-selected and matched transistors
  • balanced inputs (via DIN connectors) and RCA preamp inputs
  • separate gain controls on all 4 channels
  • no crossover filters or bass boost
  • 2- or 1/0-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • fuse rating: 130A x 1
  • 13"W x 1-15/16"H x 13"D
  • warranty: 2 years
  • Our 60-day money-back guarantee
Preliminary info from the manufacturer
Features and Specs
Performance
RMS Power Output (Watts x Channels)
Loading...
280 x 4
Peak Power Output (Watts x Channels)
Loading...
---
Power at 2 Ohms (Watts x Channels)
Loading...
280 x 4
Bridged Power (Watts x Channels)
Loading...
560 x 2
Minimum Impedance Bridged
Loading...
2
Minimum Impedance Unbridged
Loading...
1
Best Frequency Response
Loading...
10-80000 Hz
THD at Rated RMS Power
Loading...
---
Signal to Noise Ratio
Loading...
---
Input Voltage
Loading...
---
Features
Amplifier Class
Loading...
AB
Low-Pass Crossover Frequency
Loading...
N/A
Low-Pass Slope (dB/octave)
Loading...
---
High-Pass Crossover Frequency
Loading...
N/A
High-Pass Slope (dB/octave)
Loading...
---
Bass Boost
Loading...
No
Bass Boost Frequency
Loading...
---
Fan Cooled
Loading...
---
Fuse Rating
Loading...
130
Speaker Level Inputs
Loading...
Harness
Preamp Outputs
Loading...
---
Width (inches)
Loading...
13
Height (inches)
Loading...
2-15/16
Depth (inches)
Loading...
13
Parts Warranty
Loading...
2 Year
Labor Warranty
Loading...
2 Year
Be the first to review this product
Great Gear Giveaway rewards card

Submit a review and then enter to win a $500 rewards card

Review this product:

Thanks for taking the time to share your experiences about this product. Please be sure to focus your comments on the product itself. Read our Review Guidelines for more information.

Your email won't be visible. Please use the email address that is associated with your order.
(e.g., JohnD) Your review will be signed using the display name and location
(e.g., Charlottesville, VA)

Click on a star to rate the overall product on a scale of 1-5
1500 characters left
Attach a YouTube Review
Crutchfield Video Review Guidelines
  • Only submit videos that you made or are authorized to use.
  • Do not submit videos that contain music, video or visuals that are copyrighted and belong to someone else.
  • Please see our Review Guidelines for more information.
500 characters left
500 characters left

Add accessories for the Brax Matrix MX-4B

You'll need an amp wiring kit to install your new amplifier, as wiring is not included. See all categories & accessories

Rockford Fosgate RFK4 4-gauge amplifier power wiring kit
10 people say
Your Price: $114.99
Add to Cart
Rockford Fosgate RFK4X Complete 4-gauge amplifier wiring kit
Includes patch cable and speaker wire
12 people say
Your Price: $159.99
Add to Cart
T-Spec 16-gauge Speaker Wire Black/white jacket — priced per foot
12 people say
Your Price: $0.69
Add to Cart
T-Spec 12-gauge Speaker Wire Black/white jacket — priced per foot
27 people say
Your Price: $1.99
Add to Cart
Stinger PRO Series 16-gauge Speaker Wire Black jacket — priced per foot
46 people say
Your Price: $0.39
Add to Cart
JL Audio XD-CLRAIC2-SW 2-channel speaker output converter (bare speaker wires to male RCAs)
12 people say
Your Price: $9.99
Add to Cart
Kicker KISL 2-channel speaker wire adapter (bare-wire connector to RCAs)
12 people say
Your Price: $12.99
Add to Cart
T-Spec 2-Channel RCA Patch Cables Available in 7 different lengths (20-foot)
23 people say
Your Price: $20.99
Add to Cart
52 people say
Your Price: $9.99
Add to Cart
T-Spec Capacitor 1.5-farad capacitor with red LCD meter
9 people say
Your Price: $79.99
Add to Cart
Metra Crimp Tool and Connectors Package contains crimp tool and over 150 pieces
15 people say
Your Price: $19.99
Add to Cart
S&G Wire Cutter/Stripper Tool Cuts and strips 12- to 22-gauge wire
14 people say
Your Price: $19.99
Add to Cart
S&G Tool Aid 87650 Door Trim and Panel Removal Tool
66 people say
Your Price: $9.99
Add to Cart
Pro.Fit Wire Worm Installation tool helps route wiring through tight spaces
28 people say
Your Price: $12.99
Add to Cart
Bojo Trim Panel Tools Set of 6 pry tools — helps remove interior and exterior trim and door panels
51 people say
Your Price: $24.99
Add to Cart
Skewdriver Pro SPK4042 Ratcheting straight and offset screwdriver set with 40 bits (Skewdriver Pro with ratchet handle, pictured)
8 people say
Your Price: $49.99
Add to Cart
Bojo Trim Panel Tools Set of 6 pry tools — helps remove interior and exterior trim and door panels
2 people say
Your Price: $29.99
Add to Cart
DEI Heat Shrink Tubing Black 4-foot length (Assortment)
6 people say
Your Price: $24.99
Add to Cart
Your Price: $69.95

After $10.00 Price Break

Add to Cart

Why choose SquareTrade?

The #1-Rated Protection Plan

Thousands of people have reviewed SquareTrade Protection Plans — and made us #1.

5-Day Service Guarantee & Free Shipping

We'll repair or replace your item in five business days or less after we've received it, or your plan is free. And, as always, we pay for all shipping.

Protection from Normal, Everyday Use

Repairing your average mechanical or electrical failure can cost as much as buying a new device. With SquareTrade, you're covered — including parts and labor.

3 Year Protection Plan
3 Year Protection Plan
Your Price: $349.99
Add to Cart
4 Year Protection Plan
4 Year Protection Plan
Your Price: $524.99
Add to Cart

For a more in-depth review and enhanced detailed information on the Brax Matrix MX-4B, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_875MX4B/Brax-Matrix-MX-4B.html ).