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About this product
Product Identifiers
BrandRockford Fosgate
MPNR4004D
UPC0780687333119
ModelR400-4D
eBay Product ID (ePID)112003211
Product Key Features
RMS Power400W
Channels4
Additional Product Features
Amplifier TypeMulti Channels
BridgeableYes
Brand SiteHttp:/Www.Rockfordfosgate.Com/Products/Product_Details.Asp?Item_Id=120544&Locale=En_Us
Bass BoostWith Bass Boost
MOSFET CircuitryYes
Bass Boost Frequency45Hz
Ratings and reviews
Most relevant reviews
- 13 Oct, 2021
Overall value
Rockford has always produced great products. I’ve been buying equipment from them since the early days and even though this amplifier is from the entry level series, it doesn’t disappoint. The power and sound quality is by far still great compared to amplifiers of similar size but higher price tags. Can’t go wrong with this amp if you’re looking for something to start off with. Thanks again Rockford.Verified purchase: YesCondition: Pre-owned
- 29 May, 2018
Excellent!! Rockgord does it again.
This amplifier suprised me immensely. It's compact so installation is snap. It fits and using Rockford CP tech. In a smaller heat sink. Well worth the money.Verified purchase: Yes
- 23 Jan, 2018
So far so good
It’s only been a week since I installed it but what a difference it makes... I upgraded my wrangler stock speakers to Kickers and this amp makes them come alive! I am very impressed so far!Verified purchase: YesCondition: New
- 27 Jul, 2020
Great little amp.
Paired it with some Rockford t series for doors and back deck. Sounds great. Can play max volume with no distortion.Verified purchase: YesCondition: New
- 14 Sep, 2018
4 channel fosgate amp
Best quality amp for the priceVerified purchase: YesCondition: New
- 14 Nov, 2017
Good amp
This us a good amp for the budget shopper . I have 1 in both of my cars and they do the job .Verified purchase: YesCondition: New
- 02 Nov, 2017
NIce unit
My old one did not last a Month. I think all the wires came loose. I will keep the old one for a spare.Verified purchase: YesCondition: New
- 23 Jan, 2019
Its Okay
Sound is not very clear with this amp. Probably because it is a class D amp instead of an A/B. Makes my speakers sound like junk compared to the amp it replaced which was also a Fosgate amp just a class A/B.Verified purchase: YesCondition: New
- 25 Oct, 2015
Rockford Fosgate Amp
Just installed the amp a week ago and all seems to be working fine. spend the time to fine tune it for the best performanceVerified purchase: YesCondition: New
- 08 Apr, 2020
Nice Flexible design..
Perfect flexible Amp for what I needed. High and lo pass filters and plenty of crossover and gain controls...Verified purchase: YesCondition: New
