Garage
Shop

See all parts that fit your 2012 NV3500

Rockford Fosgate Prime R400-4D

400W 4-Channel Class D Prime Series Full Range Amplifier

Product videos
highlight-star-icon

• 75W x 4-Chan. @ 4 ohm
• 100W x 4-Chan. @ 2 ohm
• 200W x 2 Chan. @ 4 ohm Bridged
• Variable Bass Boost
• Variable High-Pass Crossover
• CEA-2006 Compliant

Learn more about the r4004d

We apologize

This item has been discontinued


Loading...
DMH-1800NEX main

Pioneer DMH-1800NEX

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

3
-19.05%

$339.99

List price $420.00

UTE-73BT main

Alpine UTE-73BT

Single DIN Digital Media Receiver with Bluetooth

44
-16.69%

$149.95

List price $180.00

CV15BT main

Cerwin-Vega CV15BT

Single Din Digital Media Receiver with Bluetooth

3
Limited time!
DMH-W3050NEX main

Pioneer DMH-W3050NEX

6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay and Android Auto, and Built-in Alexa (Sirius XM Ready)

1
-24.20%

$469.99

List price $620.00

Club 522F main

JBL Club 522F (SPKCB522FAM)

270W Peak (90W RMS) 5.25" Club Series 2 Way Coaxial 3-ohm Speakers

-42.29%

$74.99

List price $129.95

Reference 5030cx main

Infinity Reference 5030cx (REF5030CX)

390W Peak (130W RMS) 5.25" Reference Series 2-Way 3-ohm Component Speaker System

2
-60.01%

$99.95

List price $249.95

Limited time!
DMX709S main

Kenwood eXcelon DMX709S

6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto (Sirius XM Ready)

20
-33.50%

$399.00

List price $600.00

Limited time!
iLX-W670-M main

Alpine iLX-W670-M

6.75" Double DIN Touchscreen Digital Multimedia Receiver with iDataLink Maestro Support, Bluetooth, Apple CarPlay and Android Auto (SiriusXM Ready)

2
-30.01%

$349.95

List price $500.00

Limited time!
XAV-AX8500 main

Sony XAV-AX8500

10.1" Single DIN Floating Touchscreen Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay, and Wired Android Auto (SiriusXM Ready)

2
-20.20%

$798.00

List price $999.99

KMM-X705 main

Kenwood eXcelon KMM-X705

Single DIN Digital Media Receiver with Bluetooth, Built-in Alexa (Sirius XM Ready)

6
-20.40%

$199.00

List price $250.00

Product Highlights


• 75W x 4-Chan. @ 4 ohm
• 100W x 4-Chan. @ 2 ohm
• 200W x 2 Chan. @ 4 ohm Bridged
• Variable Bass Boost
• Variable High-Pass Crossover
• CEA-2006 Compliant

Description


Rockford Fosgate brand icon

Authorized dealer



Prime Certified Power

There is no better feeling than getting exactly what you paid for. This will always be the case with Rockford Fosgate's R400-4D 4-channel amplifier. This CEA-2006 compliant amplifier will give you the rated power output each and every single time, making you feel like your money was well spent. The variable high-pass crossover and variable bass boost will allow for more control of your music to be set at your personal preferences. Rockford Fosgate is well known for making great products and this amplifier is no exception. The heavy duty cast aluminum alloy heatsink will help reduce heat and lower distortion levels or possible thermal overload. This will keep your amplifier running smooth and safely during any listening session. So if you are looking for a reliable, and efficient 4-channel amplifier without breaking the bank, then the R400-4D is the perfect amplifier for you.

General Features

  • Prime Series Full Range Class D 4-Channel Car Amplifier
  • RMS Power Rating:
    • 4 ohm: 75 watts x 4 chan.
    • 2 ohm: 100 watts x 4 chan.
    • Bridged, 4 ohm: 200 watts x 2 chan.
  • CEA-2006 compliant amplifier
  • MOSFET power supply
  • LED power (green) and protect (red) indicators
  • Variable Bass Boost (0 to +18 dB bass boost at 45 Hz)
  • Soft Start Turn-on
  • 4/2 channel switch
  • 40 Amp In-line fuse is highly recommended
  • Heavy duty cast aluminum alloy heatsink for extreme heat dissipation
  • Nickel-plated RCA level inputs
  • Nickel-plated screw terminals
  • Variable high-pass filter (50-250 Hz, 12 dB/octave)
  • Variable low-pass filter (50-250 Hz, 12 dB/octave)
  • Dimensions: 6-11/16"L x 11"W x 2"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

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

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

(25)

$279.99

List price $335.99

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)

$304.99

List price $379.99

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 4.220 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

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

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

MDX2000.4 2 Ohm small

PRV Audio MDX2000.4 2 Ohm

• 330 watts x 4 channel @ 4 ohm
• 500 watts x 4 channel @ 2 ohm
• Bridged: 1000 watts x 2 channel @ 4 ohm
• Total RMS Power: 2000 watts
• Class D 2 ohm Stable 4-Channel Amplifier

$219.91

List price $274.89

GM-DX874 small

Pioneer GM-DX874

• 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 1 ohm Stable 4-Channel Amplifier

(14)

$220.00

List price $300.00

Specifications & Details


Power Specifications - Full Range Channels
RMS Power @ 4 ohms
75 watts x 4 channel
RMS Power @ 2 ohms
100 watts x 4 channel
Bridged RMS Power
200 watts x 2 channel
Amplifier Specifications
Series
Prime Series
Amplifier Class
D
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
1.0%
Speaker Level Inputs
No
Preamp Outputs
No
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
Full (AP)
High-Pass Crossover Frequency
50 - 250 Hz
Low-Pass Crossover Frequency
50 - 250 Hz
Signal-to-Noise Ratio
90 dB
Bass Boost
0 - 18 dB
Remote bass/level controller
No
Fuse Rating
40A x 1 In-line fuse recommended
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

R400-4D

Weight:

5.53lbs

Internal SKU:

r4004d

Internal Product ID:

34761

Product and How-to Videos


  • 3Sixty3 Aftermarket Setup Wizard Tutorial
  • Rockford Fosgate Prime Series Amplifiers
  • How To Install an Amplifier: Car Amplifier Basics Part 2

Customer Ratings & Reviews


Rockford Fosgate Prime R400-4D thumbnail image

5 star
79%
4 star
12%
3 star
2%
2 star
2%
1 star
5%



Durability
4.6
Value
4.6
Features
4.6
Design
4.6
Usability
4.8

Customer Reviews

Sort by:

Loading...

Poor fidelity

The product is OK for a kid, or for a very noisy environment, but not OK for a discriminating ear. I tried this route because I was trying to put the amps under a cover, I thought they would stay cooler. Nope. This guy gets hot. I would recommend to some, but not others.

By Matt on September 27, 2013

59 found this helpful


great

This is my first amp of d class, but once tuned with scope or whatever It is this amp Gets it.

By lindy on December 23, 2013

55 found this helpful


Good

I have had this for a couple months now and it works great. I had to send it back for replacement after a week of owning it, not really sure what happened. Rockford fosgate is a reliable product usually but the first one started smoking after I had been using it for a while. Sonic electronix replaced it and it works great now. I do recommend buying a amp fan to go with it because it does get very hot after long periods of time. Sounds great though.

By Caleb on August 24, 2014

54 found this helpful


Good amp

Great highs amp for powering small speakers. That's all I use it for and it's not even at the 12 o clock position. I would recommend it. Also I like the fact that it's compact in size.

By Edward on April 10, 2014

54 found this helpful


Awesome amp! Rockford all the way!

I have been wanting to build an all Rockford system for a while, I knew I wanted to run a sub and four new speakers (All Rockford) but didn't want to buy two amps. This amp was the answer, pushing 500 RMS @ 2 ohms (according to the birth sheet) this thing rocks. I have two pairs of 4-ohm Rockford 6.5s running at 2-ohms bridged. So they are getting a good 65 RMS each, and they produce great highs and mid. For the lows, I have a DVC 10" Rockford sub that's being pushed a good 250 RMS. The sound is amazing, highs, lows, mids, everything all in perfect crisp harmony. This amp is absolutely amazing, not to mention its a perfect size. All my friends find it hard to believe that this little amp pushes so hard. Worth every penny!

By Matt on December 11, 2013

51 found this helpful


Like you need me to tell you to buy this amp

Mated the Rockford Fosgate R400-4D to a Pioneer head unit. Wow! Amazing sound. Loud. Crisp. Clear. Everything you want in a sound system. Fits perfectly under the front driver's seat. It sounded great out of the box but is absolutely superb now that I've been able to tweak it a little bit. Installed the amp using an NVX Audio XKit44 with 4 gauge wire 4 channel connection kit. Stop reading reviews and buy this amp.

By Paul on April 30, 2014

50 found this helpful


small with a lot of power!!

This amp is great.. I bough it to wire 4 Rockford Fosgate PPS8-6 to wire them at bridge 4ohms (2 speakers at each channel bridge) let me tell you..WOW!! This amp gives power to the speakers and I'm happy with that..I recommend this amp and for the price..NICE!!

By edrick on March 1, 2014

50 found this helpful


Good Amp!

Fast shipping, never have problems with the amp, & puts out more than it says.

By Alex on November 22, 2013

50 found this helpful


Excellent Amplifier

Got this amplifier to power my six speakers in my '99 Camaro; it does an excellent job! Ran the two rear pair in parallel and made a custom MDF rack to mount both this amp and the sub amp on the trunk deck just behind the back seat. My only frustration with the amplifier is the angle that the wires have to enter into the terminals at; they wires have to bend upward. It's just less convenient than having terminals coming straight out of the amplifier.

As far as sound quality goes, this amplifier brought my Rockford Fosgate Punch speakers to life! The clarity is brilliant and the crossovers work splendidly. I am very pleased with my purchase and will always look to Rockford for car audio components.

By Geff on October 2, 2013

50 found this helpful


Great Bang for the buck!

Awesome power for such a small size. Fits in small space.

By Stacy on September 23, 2013

50 found this helpful




DD-1 main

SMD DD-1 Distortion Detector/Analyzer

• Distortion Detector/Analyzer (DD1)
• Distortion Detector's Circuitry Is 100% Analog
• Distortion Detection Trigger Level > 1.0% Harmonic Distortion
• Operating Range of Input Signal is 1.2Vrms – 125Vrms. (15,000 Watts at 1 ohm) Autoranging
• Signal Present LED Trigger Voltage 750mVrms

(104)

$199.98

List price $209.98


99-3014G small

Metra 99-3014G-open box

Chevy Silverado and Sierra 2014-UP SDIN/DDIN

$19.99

List price $39.99

IHT-4X4HDMSW small

Icarus IHT-4X4HDMSW

Super Slim HDMI 4x4 Matrix Selector Switch

$599.99

List price $1295.99

MPC-V300-MVS-2R small

Monster Cable MPC V300 MVS-2R

300 Series VideoSplit Video Distribution System, 1-to-2 Multi-Video Amplifier

(2)

$39.99

List price $49.99

EB91S small

Kicker EB91S In-Ear Monitor Headphones Stereo Earbuds (EB91 Silver)

MicroFit In-Ear Silver Monitor Ear Buds

$29.95

List price $39.95

Related Searches


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

2012 Nissan NV3500

1994 Honda Del Sol

1961 Chrysler Windsor

2002 Lamborghini Murcielago

2015 Honda Fit

1993 Dodge Colt

2011 Lexus IS250C

2024 BMW 7 Series

1988 Pontiac Formula

2022 Audi RS6 Avant

Vehicle
Store
Delete

2005 Harley Davidson FLSTF/I Fat Boy

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.