Prime 400 Watt Full-Range Class-D 4-Channel Amplifier R400-4D
The PRIME R400-4D is an ultra-efficient 4-channel amplifier producing 100 Watts into four channels at 2-Ohms. Run a 4-way full-range system or use it with components on the front channels with subwoofers on the rear.
• This model replaced by the R2-500X4
The Prime R400-4D amplifier offers high efficiency through the implementation of its Class-D circuitry while being able to power a full-range system. This amplifier is optimized for 4-channel front/rear systems so you can run midrange/tweeters in the front doors/dash while running midrange/tweeters in the rear doors/deck. Match with a mono amplifier for subwoofers and you'll have a Rockford Fosgate system that any Car Audio Fanatic will envy.
- 12dB/octave Butterworth crossover
- RCA pass-thru outputs
- Tri-stage protection covers thermal, over-current and short circuits.
- On-board Punch EQ with +18dB boost @ 45Hz
- 2/4 channel input switch
- 4 Gauge power/ground connectors
- Cast aluminum heatsink
- Top mounted controls
- 1 Year Warranty
A full-range version of the Class-D topology which is a high efficiency amplifier design that reduces ...Learn more
A full-range version of the Class-D topology which is a high efficiency amplifier design that reduces current consumption from the charging system.
Power ratings on Rockford Fosgate amplifiers conform to CTA-2006 industry standards. These guidelines mean your amplifier's ...Learn more
Power ratings on Rockford Fosgate amplifiers conform to CTA-2006 industry standards. These guidelines mean your amplifier's output power ratings are REAL POWER numbers, not inflated marketing ratings.
Power supply circuit design that allows the amplifier to increase output power as voltage increases.Learn more
Power supply circuit design that allows the amplifier to increase output power as voltage increases.
75W x 4 @ 4Ω
(Sum of Rated Power)
(RMS Continuous Power)
100 Watts x 4 @ 2-Ohm
200 Watts x 2 @ 4-Ohm Bridged
145 Watts x 4 @ 2-Ohms 0° Res
75% @ 2-Ohm
Rear: Variable 50Hz - 500Hz @ 12dB/Octave
(5cm x 17.20cm x 23.10cm)
Knowledge Base Articles
- 2013 Prime amplifiers - owner's manual
- 2011 Prime Full Range Class-D Amplifiers - owner's manual
- RFI2SW & RFIF2SW Speaker Line To RCA Adapter - product advisory
Ask Our Experts
Contact the Authorized Rockford Fosgate Dealer you purchased this product from. If you need further assistance, call 1-800-669-9899 for Rockford Customer Service. You must obtain an RA# (Return Authorization number) to return any product to Rockford Fosgate. You are responsible for shipment of product to Rockford.
I've owned Rockford amps in the past. Picked up an R400-4D to replace a mtx amp, It just wasnt a very good amp. The R400-4D is a good amp for a simple 3 way setup. Enough power to rock the cab of a full size extended cab pickup.
5.0Write a Review
Be first to hear about the latest products.
Sign up for product updates.