Garage
Shop

See all parts that fit your 2018 Defender HD10

MB Quart FA1-400.4

400W RMS FORMULA Series Class A/B 4-Channel Amplifier

MB Quart
Shop all MB Quart
highlight-star-icon

• 2-Channel Class SQ (Class A/B) Amplifier
• 50W x 4 @ 2 ohm / 100W x 4 @ 4 ohm
• DC Signal Sense
• FLUID-FETS
• Heavy duty heat-sink efficiently moves heat from the MOSFET
• Bass Boost: 0-9dB

Learn more about the fa14004

We apologize

This item has been discontinued


Loading...
240-DF-US10V main

SSV Works 240-DF-US10V

Loaded Single 10" Front or Rear Underseat Sealed Enclosure for select 2018-2024 vehicles from Can-Am

Limited time!
MBQD-SUBA-1 main

MB Quart MBQD-SUBA-1

400W RMS Loaded Dual 10" Amplified Subwoofer Enclosure for select 2016-2025 vehicles from Can-Am

-22.81%

$764.15

List price $989.99

RVM-35V1 main

MB Quart RVM-35V1

3.5" Touchscreen Multi-Zone Digital Multimedia Receiver with Bluetooth for RV's

-10.38%

$189.99

List price $211.99

RV.R1 main

DS18 RV.R1

Multi-Zone Digital Audio Receiver with Bluetooth Audio Streaming for RV's

RVDVD3.0 main

MB Quart RVDVD3.0

Multi-Zone DVD Receiver with Bluetooth for RV's

1
-10.10%

$257.99

List price $286.99

MB Quart RVM2.0

Multi-Zone Digital Audio Receiver with Bluetooth Audio Streaming for RV's

-10.29%

$156.99

List price $174.99

RVM-10V1 main

MB Quart RVM-10V1

10" Touchscreen Multi-Zone Digital Multimedia Receiver with Bluetooth for RV's

-9.09%

$250.00

List price $275.00

US2-C65A-175 main

SSV Works US2-C65A-175

120W Peak (60W RMS) Cage Mount Speaker Pods with 1.75" Clamp

US2-C65A-200 main

SSV Works US2-C65A-200

120W Peak (60W RMS) Cage Mount Speaker Pods with 2" Clamp

220-US2-C65U-150 main

SSV Works US2-C8U-150

Unloaded 8" Cage-Mount Speaker-Pods Enclosure

Description


MB Quart brand icon

Authorized dealer

MB Quart FA1-400.4

MB Quart Formula series four channel car audio amplifier featuring innovative sound quality and power technology. The FA1-400.4 is a 400 watt bridgeable car audio amplifier. Formula amplifiers feature DC Sensing to allow any amplifier to be easy integrated into an OEM system by simply adapting a RCA cable from the source unit.

Product Details:

  • 4-Channel Class SQ (Class A/B) Amplifier
  • RMS Power Output:
    • 50W x 4 @ 2 ohm
    • 100W x 4 @ 4 ohm
  • The DC Signal Sense switch will allow the amp to turn on when a signal is received on the RCA inputs, so an amplifier remote turn on wire is not needed to turn on the amplifier. This feature can also be turned off.
  • Variable electronic crossovers allow for complete control of the sound
  • FLUID-FETS are painstakingly selected for their ability to efficiently produce power and mimic the sound quality of the highest end home amplifiers.
  • Heavy duty heat-sink efficiently moves heat from the MOSFET where it can be cooled
  • Variable High Pass Crossover 12dB Per Octave (CH1 & CH2 / CH3 & CH4): 50hz - 500hz (Switched, Full / HPF / LPF)
  • Variable Low Pass Crossover 12dB Per Octave (CH1 & CH2 / CH3 & CH4): 50hz - 250hz (Switched, Full / HPF / LPF)
  • Bass Boost: 0-9dB
  • Variable Voltage: 0.2 - 9V
  • Signal to Noise: >90
  • Frequency Response: 10Hz - 45KHz
  • THD: <0.5%
  • Fusing: 20A x 2
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Best selling similar products

VADM4v2 small

NVX VADM4 v2 (VADM4v2)

• 80 watts x 4 channel @ 4 ohm
• 125 watts x 4 channel @ 2 ohm
• Bridged: 250 watts x 2 channel @ 4 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable 4-Channel Amplifier

(41)

$209.99

List price $239.99

NDA6004 small

NVX NDA6004

• 100 watts x 4 channel @ 4 ohm
• 160 watts x 4 channel @ 2 ohm
• Bridged: 320 watts x 2 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 4-Channel Amplifier

(14)

$159.99

List price $215.99

MFA 4.220 small

Deaf Bonce MFA 4.220

• 220 watts x 4 channel @ 4 ohm
• 330 watts x 4 channel @ 2 ohm
• Bridged: 660 watts x 2 channel @ 4 ohm
• Total RMS Power: 1320 watts
• Class D 2 ohm Stable 4-Channel Amplifier

$289.90

List price $289.90

RD400/4 small

JL Audio RD400/4

• 75 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class D 2 ohm Stable 4-Channel Amplifier

(28)

$379.99

List price $379.99

MFA 4.180 small

Deaf Bonce MFA 4.180

• 180 watts x 4 channel @ 4 ohm
• 270 watts x 4 channel @ 2 ohm
• Bridged: 540 watts x 2 channel @ 4 ohm
• Total RMS Power: 1080 watts
• Class D 2 ohm Stable 4-Channel Amplifier

$259.90

List price $259.90

JD400/4 small

JL Audio JD400/4

• 75 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class D 2 ohm Stable 4-Channel Amplifier

(34)

$299.99

List price $299.99

VAD10004v2 small

NVX VAD10004 v2 (VAD10004v2)

• 150 watts x 4 channel @ 4 ohm
• 250 watts x 4 channel @ 2 ohm
• Bridged: 500 watts x 2 channel @ 4 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable 4-Channel Amplifier

(24)

$279.99

List price $335.99

MVPA4 small

NVX MVPA4

• 100 watts x 4 channel @ 4 ohm
• 150 watts x 4 channel @ 2 ohm
• Bridged: 300 watts x 2 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 4-Channel Amplifier

(70)

$279.99

List price $383.99

AP200/4BT small

JL Audio AP200/4BT

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

$549.99

List price $659.99

Specifications & Details


Power Specifications - Full Range Channels
RMS Power @ 4 ohms
100 watts x 4 channel
RMS Power @ 2 ohms
50 watts x 4 channel
Power Specifications - Full Range Channels
Peak Power @ 4 ohms
200 watts x 4 channel
Peak Power @ 2 ohms
100 watts x 4 channel
Amplifier Specifications
Series
Formula Series
Amplifier Class
A/B
Number of Channels
4-Channel
Total Peak Power Output
800 watts
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
<0.5%
Speaker Level Inputs
Yes
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
High-Pass Crossover Frequency
50 - 500 Hz
Low-Pass Crossover Frequency
50 - 250 Hz
Signal-to-Noise Ratio
>90 dB
Bass Boost
0 - 9 dB
Remote bass/level controller
No
Fuse Rating
20A x 2 
Total Fuse Rating
40
Strappable
No
Sonic Certified Amplifier
Not Tested
Amp Bluetooth Connectivity
No
Hi-Res Certified
No
What is in the box?
Paperwork
User manual
WITB: Amplifiers
Amplifier
Mounting screws (4)
Washers (4)
Allen wrenches (2)
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

FA1-400.4

Weight:

3.00lbs

Internal SKU:

fa14004

Internal Product ID:

175045

Customer Ratings & Reviews


MB Quart FA1-400.4 thumbnail image

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



Durability
0
Value
0
Features
0
Design
0
Usability
0

Customer Reviews

Sort by:

Loading...
Sorry, no reviews found


TS-W258D4 small

Pioneer TS-W258D4

10" Dual 4 ohm Champion Series Subwoofer w/ Double Stacked Magnet

(6)

$69.99

List price $134.99

97-06-JEEP-WRNGLER-J3SPKG small

JBL Stage3 627F Complete Speaker Replacement Kit

Fits select 1997-2006 Wrangler

(13)

$194.88

List price $258.88

Recon 6-S small

Wet Sounds Recon 6-S

240W Peak (120 RMS) 6.5" Recon Series 2 Way Coaxial 4-ohm Marine Speakers with Silver Grilles

$169.99

List price $274.99

GTR-1001 small

JBL GTR-1001

2600W Max (1000W RMS) GTR Series 2-Ohm Stable Monoblock Subwoofer Amplifier

$199.95

List price $599.95

DS 800x2 small

Taramps DS 800x2

800W RMS Class D DS Series 2 Channel Car Amplifier

$135.00

List price $177.00

DES1000.1D small

Diamond Audio DES1000.1D

1000W RMS Class D Diamond Elite Series Monoblock Car Amplifier (with Bass Remote)

(1)

$769.99

List price $719.99

P4004 small

Rockford Fosgate P4004

1600W Max, Punch Series 4-Channel Amplifier

(1)

$179.99

List price $349.99

RE4-2000D small

Power Acoustik RE4-2000D

2000W Peak Class D 4-Channel Full Range Car Amplifier

$74.95

List price $79.99

H41200.4 small

Cerwin-Vega H41200.4

1200W HED Series 4-Channel Class AB Amplifier

(1)

$171.99

List price $299.99

Related Searches


Save up to 10 different vehicles in your garage
Vehicle
Store
Delete

2016 Audi Q5

2018 BMW 2 Series

1992 Ford Bronco

2012 Ford Expedition

2006 Ford Freestyle

2011 Porsche Boxster

2022 Audi A3

2016 Ford Transit-350

1993 Mazda 626

1973 Jeep CJ5

Vehicle
Store
Delete

2018 Can-Am Defender HD10

2018 Can-Am Defender MAX HD8

Add vehicle Clear all vehicles
Where to find vehicle info
Are you sure you want to clear your garage?
This action cannot be undone. Confirm
This page was not designed for products.
If you continue, you will be redirected to a category customized for your vehicle. Continue
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

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

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

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