Garage
Shop

See all parts that fit your 2008 5

Hifonics X400.4

400W BRUTUS X-14 Series 4-Channel Amplifier

Hifonics
Shop all Hifonics
Product videos
highlight-star-icon

• RMS Power: 50W x 4 @ 4 ohm, 100W x 4 @ 2 ohm, 200W x 2 @ 4 ohm Bridged
• Total Peak Power: 400W
• CEA-2006 Compliant/Preamp Outputs/LPF
• 11.02"W x 2.5"H x 9.49"L

Learn more about the x4004

We apologize

This item has been discontinued


Loading...
70-7903 main

Metra 70-7903 Wiring Harness

Install a new car stereo in select 2001-2021 vehicles from Mazda, Fiat

18
BMV62W main

Belva BMV62W

6.2" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto and Phone Mirroring

28
-66.67%

$89.99

List price $269.99

REF687F main

Infinity REF687F (INFSPKRF687FUS)

360W Peak (120W RMS) 6x8" Reference Series 2-Way Coaxial 3-ohm Speakers

1
-18.76%

$129.95

List price $159.95

Product Highlights


• RMS Power: 50W x 4 @ 4 ohm, 100W x 4 @ 2 ohm, 200W x 2 @ 4 ohm Bridged
• Total Peak Power: 400W
• CEA-2006 Compliant/Preamp Outputs/LPF
• 11.02"W x 2.5"H x 9.49"L

Description


Hifonics brand icon

Authorized dealer

General Features:

  • Series X14 4-Channel 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.
  • Max power output: 400 watts x 4 chan.
  • Illuminated Hifonics badge
  • DC, short circuit, thermal, and overload protection
  • Variable Bass Boost (0 to +10 dB)
  • 4/3/2 or Mono channel operation
  • Variable high-pass filter (10-2,500 Hz)
  • Variable low-pass filter (30-2,500 Hz)
  • 4 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
  • Authorized Internet Dealer
  • 2-year Manufacturer's Warranty

Loading...
BV850ACP main

Boss Elite BV850ACP

6.75" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto with Backup Camera

5
Limited time!
46CSC654 main

Kicker CSC65 (46CSC654)

600W Peak (200W RMS) 6.5” CS Series 2 Way Coaxial 4-ohm Speakers

122
-33.36%

$79.96

List price $119.99

iLX-W650 main

Alpine iLX-W650

7" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay and Android Auto (SiriusXM Ready)

124
-5.72%

$329.95

List price $349.95

DMH-1800NEX main

Pioneer DMH-1800NEX

6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto, and SiriusXM Ready

2
-16.67%

$349.99

List price $420.00

DMH-W4660NEX main

Pioneer DMH-W4660NEX

6.8" Double DIN Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay, and Android Auto (SiriusXM Ready)

2
-20.00%

$599.99

List price $750.00

43DSC6504 main

Kicker DSC650 (43DSC6504)

480W Peak (120W RMS) 6.5” DS Series 2-way 4-ohm Coaxial Car Speakers (DSC6504)

28
-10.53%

$84.99

List price $94.99

Limited time!
Club 622 main

JBL Club 622

360W Peak (120W RMS) 6.5" Club Series 2-way Coaxial 3-ohm Speakers

5
-28.58%

$99.95

List price $139.95

BMV62W main

Belva BMV62W

6.2" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto and Phone Mirroring

28
-66.67%

$89.99

List price $269.99

DB652 main

Polk Audio DB652 (DB 652)

600W Peak (200W RMS) 6.5" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

12
-9.16%

$109.00

List price $119.99

CV15BT main

Cerwin-Vega CV15BT

Single Din Digital Media Receiver with Bluetooth

3

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

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 4.220 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

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

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

DS 1200X4 small

Taramps DS 1200X4

• 192 watts x 4 channel @ 4 ohm
• 300 watts x 4 channel @ 2 ohm
• Bridged: 600 watts x 2 channel @ 4 ohm
• Total RMS Power: 1200 watts
• Class D 2 ohm Stable 4-Channel Amplifier

(5)

$219.99

List price $258.00

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

R2-500X4 small

Rockford Fosgate Prime R2 R2-500X4

• 75 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

(10)

$359.99

List price $359.99

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

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
Bridged RMS Power
200 watts x 2 channel
Amplifier Specifications
Series
Brutus X 14 Series
Amplifier Class
A/B
Number of Channels
4-Channel
Total Peak Power Output
400 watts
Total RMS Power Output
400 watts
Maximum Input Gauge Size
4 AWG
Minimum Impedance Unbridged
2 ohm
Minimum Impedance Bridged
4 ohms
Speaker Level Inputs
No
Preamp Outputs
1 pair
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
High-Pass Crossover Frequency
10 - 2500 Hz
Low-Pass Crossover Frequency
30 - 2500 Hz
Bass Boost
0 - 10 dB
Fuse Rating
20A x 2 
Warranty and Return Policy
Parts Warranty Duration
2 years
Labor Warranty Duration
2 years
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

X400.4

Weight:

8.50lbs

Internal SKU:

x4004

Internal Product ID:

76255

Product and How-to Videos


  • Hifonics Brutus X14 Amplifiers | CES 2014
  • How To Install an Amplifier: Car Amplifier Basics Part 2

Customer Ratings & Reviews


Hifonics X400.4 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

Sort by:

Loading...

best value

i have this amp from sonic electronix.love the amp way it look next to my hifonics x1900.1. run 4 hifonics 6.5 components very loud and clean sound coming from this little amp ! strong as my older hifonics z600x4.amp

By greg on November 2, 2014

16 found this helpful


Good amp

This amp good for mids and hi i have one and I like it a lot

By Norman on September 5, 2014

15 found this helpful


Great amp

I hooked this amp up to 4 JBL GTO629 coaxial speakers and they sang with it! I couldn't believe the quality I got out of them! plus you don't need any spade terminals which I love. Not to mention is is a great looking amp, I have never been much for looks but I have this sitting next to a Hifonics X1500.1d and it is beautiful!

By Cameron on July 18, 2014

9 found this helpful




4012I small

Infinity Reference 4012i

** CLOSEOUT!! ** 4" 2-way Reference Series Speakers (REF4012I)

(2)

$29.99

List price $79.99

1011T small

Infinity Reference 1011T

1" Silk Dome Tweeters

(1)

$39.99

List price $79.99

ZX7500 small

Hifonics ZX7500 R/B

1000W RMS Zeus Series 2-Channel Amplifier

(1)

$149.99

List price $599.99

Related Searches


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

2016 Buick Envision

2008 Mazda 5

2009 Dodge Viper

2024 BMW M2

2013 Lexus LS600hL

2002 Dodge Ram 1500 Van

2021 Audi RS7

1984 Buick Skyhawk

2014 Buick LaCrosse

2008 Nissan Maxima

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.