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Rockford Fosgate Prime R400-4D

400W 4-Channel Class D Prime Series Amplifier

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$169.99

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Save 40% off the NVX XIV45 4-Channel RCA Audio Interconnect cables with your purchase! You will need RCA cables to install your amp!

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Rockford Fosgate Prime R400-4D

$169.99

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NVX XIV45

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NVX XIV45

• 5m (16.40 ft) 4-Channel Twisted RCA
• V-Series • Frost Blue Jacket
• Dual Twisted Pair Hyper-Flex Technology For Better Signal Transfer

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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.

  • Prime Series Full Range Class D 4-Channel Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 75 watts x 4 chan.
    • 2 ohms: 100 watts x 4 chan.
    • Bridged, 4 ohms: 200 watts x 2 chan.
  • 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)
  • CEA-2006 compliant amplifier
  • 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.
  • 1-year Manufacturer's Warranty

Power Specifications - Full Range Channels

RMS Power @ 4 ohms

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 4 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

75 watts x 4 channels
RMS Power @ 2 ohms

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 2 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

100 watts x 4 channels
RMS Power @ 1 ohm

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 1 ohm, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

Not Stable
Bridged RMS Power

Bridging refers to combining two channels on an amplifier to create one channel with double the voltage and an increased power output. A 2-channel amplifier will bridge down to 1-channel and a 4-channel amplifier can bridge to create 2-channels. An amplifier is most commonly bridged to drive a subwoofer.

Remember, once you bridge two channels down to one its final impedance will be 4 ohms unless otherwise specified. This rating lists the RMS power created once an amplifier is bridged.

200 watts x 2 channels

Amplifier Specifications

Amplifier Series
This designates the series of the amplifier. Many amps are available in a litany of different wattage and channel configurations, but maintain consistent features throughout the product line.
Prime (Rockford Fosgate)
Amplifier Class

An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.

D
Number of Channels
Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
4
Total RMS Power Output
Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

The RMS output figure is much more accurate than the peak rating when comparing products.

400 watts
Maximum Input Gauge Size
This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
4 AWG
Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
2 ohms
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
4 ohms
THD at Rated RMS Power
The amount of change in harmonic content of the signal as it is amplified. A lower figure indicates less change and a more accurate amp. THD below 0.10% is inaudible.
1.0%
Speaker Level Inputs
Speaker level inputs are commonly referred to as high-level inputs and vice versa. This input type allows you to get your audio signal directly from the speaker wire in your vehicle, instead of using RCA cables. The advantage of this is factory integration, as most stock radios do not have RCA outputs to run amplifiers.
No
Preamp Outputs
Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.
No
Built-in Crossover

A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

Low-pass (LP)
High-pass (HP)
Full (AP)
High-Pass Crossover Frequency
The high-pass crossover frequency can be a fixed crossover point or a variable crossover range. A variable high-pass crossover allows you to select a specific crossover point which allows frequencies above the set crossover point to pass, while making frequencies below the set point gently or harshly roll-off, depending on the steepness of the slope.

The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

50 - 250 Hz
Low-Pass Crossover Frequency
The low-pass crossover frequency is typically used for subwoofers. It can be a fixed crossover point or a variable crossover range. A variable low-pass crossover allows you to select a specific crossover point which allows frequencies below the set crossover point to pass, while making frequencies above the set point gently or harshly roll-off, depending on the steepness of the slope.

The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

50 - 250 Hz
Signal-to-Noise Ratio
This spec compares the strength of the signal to the level of background noise. A higher value indicates less background noise.
90 dB
Bass Boost
The objective of the bass boost is to get more kick out of your subwoofer. It is a circuit that emphasizes the lower frequencies at a given point. The bass boost should always be set first before setting the gain. This feature is known for destroying subwoofers and is commonly used incorrectly, so be cautious.
0 - 18 dB
Bass/Gain Remote
If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.
No
Fan Cooled
A great feature to have if an amp generates a large amount of heat. Cooling fans can help regulate the temperature to prevent the amp from overheating (burning).
No
Fuse Rating
The amperage and the number of fuse(s) an amp requires.
40A x 1 In-line fuse recommended
CEA-2006 Compliant
Amplifiers that have been tested to meet specific standards. When a car amplifier meets these standards, you can be sure that it will be able to produce the amount of power specified by the official CEA-2006 rating. Usually, these rating consist of the following items:
  • RMS Power
  • Signal-to-Noise Ratio

This rating applies to both external car amplifiers, as well as the amplifiers inside of in-dash stereos.

Yes

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
77%
4 Star
10%
3 Star
3%
2 Star
3%
1 Star
7%

Average Attribution Rating

Durability
4.4
Value
4.5
Features
4.5
Design
4.6
Usability
4.7
Matt

Rancho

Overall
Durability
Value
Features
Design
Usability
Poor fidelity

September 27, 2013

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.

27 of 46 found this helpful

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Caleb

Burkburnett, TX

Overall
Durability
Value
Features
Design
Usability
Good

August 24, 2014

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.

17 of 30 found this helpful

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lindy

Gretna, LA

Overall
Durability
Value
Features
Design
Usability
great

December 23, 2013

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

16 of 28 found this helpful

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edrick

Puerto Rico

Overall
Durability
Value
Features
Design
Usability
small with a lot of power!!

March 1, 2014

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!!

15 of 27 found this helpful

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steve

fraser, MI

Overall
Durability
Value
Features
Design
Usability
rockford r400-4d

July 23, 2014

this rockford amp is a great product. works well,looks good and stays cool.

11 of 20 found this helpful

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Paul

New Lenox, IL

Overall
Durability
Value
Features
Design
Usability
Like you need me to tell you to buy this amp

April 30, 2014

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.

13 of 24 found this helpful

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Matt

Jacksonville, FL

Overall
Durability
Value
Features
Design
Usability
Awesome amp! Rockford all the way!

December 11, 2013

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!

16 of 30 found this helpful

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JB

las vegas, NV

Overall
Durability
Value
Features
Design
Usability
702 LOUDNESS

November 19, 2013

Great little amp, the crossovers built into this amp are outstanding, I can dial any music from thrash to rap, and a great price, thanks sonic electronix

16 of 30 found this helpful

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David

Huntsville, AL

Overall
Durability
Value
Features
Design
Usability
outstanding performance

December 2, 2013

this is my second Rockford product and I am very happy with the amp performs great and matches with the MB Quart speakers better than any other set up I have owned

16 of 31 found this helpful

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Stacy

Grand Prairie, TX

Overall
Durability
Value
Features
Design
Usability
Great Bang for the buck!

September 23, 2013

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

20 of 39 found this helpful

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Vince

Vienna, VA

Overall
Durability
Value
Features
Design
Usability
Excellent amp for the money!

September 17, 2013

I bought this amp to replace a PPI P600.2 because I needed 2 more channels to run an active front stage. I'm powering a JBL P660C component set ran active from a MiniDSP. After I adjusted my gains the noise floor was basically nonexistent and my speakers have never sounded better. They get louder than I would ever want and sound great doing it.

The amp is tiny, even smaller than I expected, and fits under my driver's seat with plenty of room around it. It never gets even warm to the touch, even after playing music for over an hour on hot summer days with the windows down. The birthsheet said it produces almost 550 watts and I believe it. If you need a small 4 channel amp that has plenty of power for not much money, you can't do much better than this!

Also, I own the Rockford Fosgate R1200-1D that powers my 2 Polk MM1240 subs and all of the same things hold true for it as well.

9 of 17 found this helpful

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michael

battiest, OK

Overall
Durability
Value
Features
Design
Usability
great amp

August 15, 2013

All around a great amp , good sound quality, really lacks in the midrange area but still good quality well built

13 of 25 found this helpful

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jacob

Bay City, TX

Overall
Durability
Value
Features
Design
Usability
Amazing amp

March 14, 2013

If this is what the new prime series is offering I couldn't imagine what the new power series is going to offer. Got this amp pushing a set of t2 components and a set of 6x8 primes and wow sounds way better now. Had a Rockford PBR300x4 but it messed up? Sonic was quick and great on the return if you plan on getting the PBRx4 just spend the extra $15 and get this great choice on my part.

13 of 25 found this helpful

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Jonah

Dallas, TX

Overall
Durability
Value
Features
Design
Usability
Small and Powerful

November 26, 2011

I'm so happy I finally decided to add an amp to power my Polk db series speakers in my truck; it makes a world of difference in the sound quality, especially in the amount of bass added to my front stage. I went with this amp because I needed a small amp in the 50-75w rms range that would fit under my seat. This amp does not disappoint! I knew it would be small, but I wasn't prepared for how compact this little thing would be. Even with this amps small size, heat is not a problem. This amp is Class D, so it runs very efficiently, and therefore very cool. It just gets warm to the touch and has plenty of power for pretty much any system. The amp sounds great, although there is slight distortion at zero volume, but once music is playing this sound is inaudible (this distortion is probably more noticeable because I have 2v preouts and have to turn the gains a little higher than if I had 4v ones). Build quality is extremely solid and I expect this amp to last forever, my only gripe is that controls on top are a little flimsy, but this isn't a big deal at all. Overall this is a great little amp. If you're in the market for a small and powerful amp look no further than the R400-4D.

13 of 25 found this helpful

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ceon

hogansville, GA

Overall
Durability
Value
Features
Design
Usability
ford ranger

August 4, 2014

i need a small amp to fit under my seat that does not get hot and This the one

7 of 14 found this helpful

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Dohlo

Bay Area, CA

Overall
Durability
Value
Features
Design
Usability
Right size for compact installs, but lacks in sound quality

May 16, 2014

This amp is great if you're in a budget and looking for a small footprint for a compact install. But it significantly lacks in sound quality. For its size it's puts out gobs of power (birth sheet claims 514 burst power) but the sound is very... Flat. Midbass lacks clarity, highs became harsh relatively low in volume. I tried everything but I was disappointed from the get go. The old school (90's) Orion amp it replaced had MUCH better sound than this amp, much more "musical" really. It's not that this amp is terrible, it's just not great.
Maybe it would be a different story when powering a sub, but if you're looking for great sound quality look elsewhere or at least a higher end RF amp.

10 of 20 found this helpful

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Alex

Fresno, CA

Overall
Durability
Value
Features
Design
Usability
Good Amp!

November 22, 2013

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

16 of 32 found this helpful

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Geff

Upland, IN

Overall
Durability
Value
Features
Design
Usability
Excellent Amplifier

October 2, 2013

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.

19 of 38 found this helpful

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p

OH

Overall
Durability
Value
Features
Design
Usability
good

February 24, 2013

has the power, quality and runs cool, but it lacks in the mid-low range frequencies.

and to the guy who says he was only using about 15% of amp power u need to learn the gain is not a volume, it is used to tune the amp to the radio outputs, higher voltage = lower settings, lower voltage = higher settings

7 of 14 found this helpful

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Steve

Northern VA

Overall
Durability
Value
Features
Design
Usability
Outstanding amp

February 15, 2013

Clean, clear, and loud. Great amp. I'm using it to power 4 infinity 6.5 inch two way speakers in the radar arch of my boat. Factory tested at 502 watts RMS. The only amp I have that is better is the R600 (same amp more power). Definitely go for 2 guage wire and a second battery if your getting more than one.

5 of 10 found this helpful

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Ben

Chanute, KS

Overall
Durability
Value
Features
Design
Usability
Do not buy

May 11, 2012

I purchased one of these and had it hooked up to two pair of 6.5 Pioneer components for ABOUT 15 MINUTES and it completely fried itself. I'm not sure what to say about this other than the RF quality control is not the same as it used to be. I have had several RF amps in the past and never been disappointed until now. The up side is that it failed immediately instead of 13 months after purchase. Sonic was great to work with and they hooked me up w/a RMA to get my money back. I replaced this w/the JL XD400 and it blew this thing out of the water; no comparison. However, the JL amp was more. All that said, you get what you pay for. Do not buy this amp *unless your only pushing a pair of tweeters.

5 of 10 found this helpful

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Jonathan

Fort Worth, TX

Overall
Durability
Value
Features
Design
Usability
YES

July 1, 2014

These are powering my NVX v-series speakers very well. There is not much to say - this amp can work like a slave without dying from the heat, literally. The sound quality is excellent (maybe since it's a Class D amp) and the features are good too. I have absolutely no regret purchasing this amp.

10 of 21 found this helpful

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JB

las vegas, NV

Overall
Durability
Value
Features
Design
Usability
702 LOUDNESS

November 11, 2013

I got this amp because my 50 x4 four channel was out,sure glad I did,75 x 4 ,much nicer ,could not believe my ears,an for the price,also john was very helpful helping match the watts to the speakers I have thanks again sonic electronix

12 of 25 found this helpful

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Bass-on-tha-boat

Austin,Tx

Overall
Durability
Value
Features
Design
Usability
Great AMP

September 4, 2012

AWESOME AWESOME AWESOME AMP!! Produced way more power than it was rated..LOVE the amp...thanks Sonic!!

3 of 7 found this helpful

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Brooke

hickory, NC

Overall
Durability
Value
Features
Design
Usability
Great amp

June 22, 2014

Came 514w out the box gain is matched to the deck at 1 and never gets hot.

10 of 22 found this helpful

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Edward

Zachary, LA

Overall
Durability
Value
Features
Design
Usability
Good amp

April 10, 2014

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.

12 of 26 found this helpful

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james

Canada

Overall
Durability
Value
Features
Design
Usability
Not too bad

May 27, 2013

Handles everything and can push T1675-S's and T165's quite nicely. After not using the gain as a volume control and setting it properly i could push the speakers to there limits with clear highs and lows and no distortion.

5 of 12 found this helpful

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jorge

elizabeth, NJ

Overall
Durability
Value
Features
Design
Usability
great amp!

February 5, 2013

i bought this amp to power my t2-652s and spr-17c. this amp delivers and then some. for the price and power this amp puts out i def. recommend this product. i have been a fan of rockfords amps and speakers since i started building my audio system. they deliver top quality products. especially there prime amps. the size is another plus in my book. i have not have any problems with this amp or any of rockfords products. to put the icing on it all ,sonicelectronix prices are especially why i keeping coming back to buy more products!! thanks!!

5 of 12 found this helpful

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Richard

Carlinville, IL

Overall
Durability
Value
Features
Design
Usability
Amazing amp

May 27, 2013

Once again Rockford does its stuff. This amp is a monster and runs my Power 6x9s and 5 1/4" components extremely well. They aren't monster speakers by any means, but this amp keeps them perfectly fed at 75w to the components and 100w to the rears...very, very loud! Keeps the music as loud as and clear my subs keep their bass, which is nice because now I can actually hear the music rather than bass alone.

9 of 21 found this helpful

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Big E

New Lenox, IL

Overall
Durability
Value
Features
Design
Usability
very strong but maybe something wrong with it

October 22, 2012

Had this hooked up to 4 rockford fosgate T1675's that say they handle 75 watts rms each. this amp puts out 75rms X 4 but i had the gains on 2. 2 out of 11 and was insanely loud. Anyways, speakers started sounding very bad after about an hour and the amp started smoking really bad. keep in mind that i was only using about 20% of the amp capability so i was only putting around 15 rms to each speaker. i have been hooking up stereo systems for 15 years.

4 of 11 found this helpful

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Accessory Tools and Products

Accessories added

NVX XKIT44 4-Gauge 4-Channel Wiring Kit

4-Channel 100% OFC Complete True 4 Gauge Amp Kit with RCA Cables and Speaker Wire

Your Price $119.99

Rockford Fosgate RFK4 4-Gauge Wiring Kit

Get a matching Fosgate wiring kit for your new Fosgate amplifier! Don't forget the RCA's!

Your Price $69.99

NVX XBG3PK 1/0 Gauge OFC Big 3 Upgrade Kit

Comes with everything you need to upgrade your power and ground wire.

Your Price $79.99

Kicker Big 3 Package 1/0 Gauge Big 3 Upgrade Kit

Get all you need including wire cutters to upgrade your power and ground wire.

Your Price $151.99

Belva BBG3KT CCA 1/0 Gauge Big Three Kit

Features everything needed to upgrade factory power and ground wire.

Your Price $39.99

Small Universal Remote Level Bass Control

The Scosche RLC is a smaller universal bass remote that connects via RCA inputs.

Your Price $11.99

StreetWires FB4

4 AWG / 4 Gauge Firewall Bushing

Your Price $6.95

NVX XIV45 4-Channel RCA Audio Interconnect Cable

5 Meters (16.4 ft.) 4-Channel RCA Audio Interconnect Cable with Dual Twisted Pair Hyper-Flex Technology

Your Price $23.99

NVX XIX45 X-Series RCA Interconnect Cable

16.4 ft. of 4-Channel X-Series RCA Cable with Dual Twisted Pair Hyper-Flex Technology

Your Price $34.99

StreetWires ZN9 Series Interconnect Cable

16.4 ft. of 4-Channel RCA Cable with Rhodium-plated contacts and ZeroNoise construction for clear signal transfer!

Your Price $99.95

Kicker 4-Channel RCA Audio Interconnect Cable

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Browse 5 questions and 20 answers
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Why did you choose this?
Sonic Electronix Store
This amp works perfect with therockford 6.5 components i had ordered previously
alex b on May 4, 2015
Great reviews. Can't go wrong with Rockford-Fosgate.
Paul W on Apr 19, 2015
Ive always had great products from Rockford
Ben L on Apr 27, 2015
(1) The great clarity it produces, the price and the dimension the perfect fit for my Euro Nissan Navara truck
Jeffrey B on Mar 1, 2015
what is the punch level remote?
A shopper on Aug 8, 2014
Best Answer: The Punch level remote allows you to "turn the bass down" while the volume of your music remains the same. This becomes useful if you're not in the mood for heavy bass, allowing you to turn it down while not losing any settings.
Reply · Report · David F on Aug 9, 2014
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I have some 6x9s and some 4x6s and if I hook the 4x6s to this will the gain be more than 40 watts rms when turned down?
matthup on Nov 11, 2014
Best Answer: Adjusting the gain does not change the wattage. If your 4x6s can handle 100 watts rms you'll be fine. You'll most likely need to have the high pass filter on though. As far as hooking up the 6x9s along with them, set the amp gain according to what the 4x6s can handle. To get the most out of your speakers you'll need seperate amps unless both sets of speakers have the same, or close, power rating.
Reply · Report · David F on Nov 11, 2014
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I have two set of speakers door speakers rated at 80 rms rear ones 100 rms will this amp be ok. How do i set the Gain?
easymoney on Jan 15, 2015
Best Answer: Hello Monte,

The amp will suffice. You will be underpowering the '100w' speakers , but the only way around that is by running a separate amp, which surely isn't practical. The gain is to be set the same way. Gain settings aren't intended for power output, its meant to match the sensitivity of the headunit; Sense the headunit is the same the Gain is meant to be set up the same.
Reply · Report · Customer SStaff on Jan 17, 2015
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if i hooked up 4 4inch speakers to 2 channels will that split the rms power in half to each set? so each set would get like 35 watts rms?
matthup on Nov 12, 2014
Best Answer: Hello Matt,

Yes, sort of. It will also alter the impedance. That is, if the speakers are 4ohms, wiring a PAIR together will drop the impedance to 2ohms. SO, you will instead split the power that amp is providing at 2ohms, i.e. 100w rms/2 = 50w per speaker x 4 .

THIS WILL OBLIGATE THE SETUP TO RUN AT 2OHMS ONLY!! If the other two channel are NOT ran at the same impedance [in this example, 2ohms] it WILL HARM THE AMP = Warranty Void. Plan accordingly.
Reply · Report · Customer SStaff on Nov 12, 2014
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Product Summary

Manufacturer

Model Number

R400-4D

UPC

780687333119

Weight

5.53lbs

Internal SKU

r4004d

Internal Product ID

34761

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Rockford Fosgate Prime R400-4D

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