Rockford FosgateP400X4 Punch 400-Watt 4-Channel Amplifier

This is a great amplifier and I've had mine since 2018. You can tune it to the way you want and to prevent clipping it has a nice led indicator. I have Rockford Fosgate everything except my subwoofer amplifier and my front door speakers as I found something better for my application. I am using this to drive two cheap speakers on my rear deck and two JL C1 speakers that can perform at a high volume. My only dislike about this unit is between my aftermarket head unit and this amplifier I've found it simply can't produce enough volume before it starts clipping. I would've been happier at the time I bought this if I had gone with a more powerful Amp but for current me this suits me most fine. For most applications this will provide you with enough volume and quality that you need, unless you're trying to show off and it gets a little distorted when turned up too loud. This is a great Amp and once you set it up you'll never touch it again. I would recomend mounting it down as I used an 8 Guage wiring kit(could have gone with 4 Guage but this unit doesn't really need it) and you definitely don't want that to get pulled out. Would recomend for casual listening but not show boating.

It's been quite a while since I bought an amp. The industry has really changed, and for the good. More features/perfornace for less cost. I've mostly owned Alpine and Precision Power amps, and I tried to buy another PPI, but they were out of stock, and I took a look at Rockford. The prices were pretty good at this time so I took a chance.The P400x4 is compact and heavy. I was surprised at the quality of construction, really nicely done. Things like that can tell you a lot about a company. Anyway, the feature set is also quite good, and being able to double the wattage from 4 to 2 ohms is seriously impressive. And the bottom line of course is the sound. This amp is really nice sounding. I'm running a set of Pioneer components, and the amp drives them effortlessly. They don't have much low bass, so I won't comment on that, but the balance and quality of vocals, instruments and highs is really good for the money. Imaging and soundstage, it's all there. I'll be buying another amp next year for the subs, and it'll be a Rockford Fosgate.Edit April 29/16I changed up my system as I upgraded the wimpy stock 6x9 speakers on the back deck of my Altima with Pioneer TS-D6902R. I'm now running 2 channels of the amp to the rear speakers, and the front comps get the other 2 channels. Wow. This amp is making my jaw drop running all speakers full range. Lots of tight bass from the 6.5 and 6x9's. Clear, clean, effortless and more volume than I can handle. You really can't go wrong with these Punch amps.

I replaced an Alpine (100w x 4) class-D amp on my boat with this Rockford Fosgate (75w x 4) class A/B amp and it sounds much better . It's driving (4) Alpine 6 x 9 speakers, model 6912m. More than enough power. This amp gets just as loud as the 100w Alpine. I think both amps are plenty of power for the Infinity's.This amp was very easy to fine tune. Nice controls. Parametric Bass EQ let me pick the bass frequency I wanted to boost and then a separate gain control to adjust the bass level to just how I wanted it. Perfect Boom... but not too much to interfere with the rest of the music, but it's really there. Boom.All the harmonics that were missing with the class-D amp are back now. I listen to rock and occasionally rap/pop. This amp is perfect for that. Rock on Fosgate!

i had a kicker amplifier IS704, had it repaired 3 times over the years, got fed up, so i puchased this rockford amplifier because my old rockford amp still works up to this day and am satisfied with its performance through the years, (bought it together with the kicker IS704) its been 15 years. we needed a smaller wattage amp to our smaller car, this is a very good amplifier, used it to power my sony 2 din stereo, hooked it with four mb quart separates for my front and rears, sounds great...still got my old rockford fosgate punch amp to power my kicker subwoofer, no problems at all, great product, rockford fosgate amplifiers are of good quality.. will definitely use rockford fosgate......

PUNCH p600.4 is a good amp, it produces a good amount of power and its clean sounding , high SQ.MY SPEC SHEET Claims 529 watts @ 4 ohms, thats right around 132 watts each channel@ 4 ohms.This amp has the c.l.e.a.n technology and it appears it does a good job cause the sound is clear at high volume, my ears give out before the clear music does. This amp is pushing 4 HERTZ door speakers and its loud, prolly hearing damage loud, but still clean and clear with no distortion. Of course i dont ride around with it playing full tilt but its fun to show off to stereo enthusiats.

i normally dont write reviews but i just have to let everyone know I'm absolutely loving my amp. I had bought an Alpine pdx f6 with 600 watts rms for $420 DOLLARS and I sent it right back because it was cutting off at high volume which my older rockford with 400 watts was pushing with no problem. So I decided to go back to rockford but I wanted more watts and it was the grratest decision ever. This baby is pushing 4 power acoustik 8" mids speakers, each 100 watts rms and 4 tweeters and is putting power like no other amp. I might even upgrade my speakers soon for more rms and get full power. Btw my certificate states 847 watts rms!!!!! Dont listen to negative comments probably from people that dont even have a good set up to start with. Figure the rms watts needed for your system and chose between the p400 or p600 and you won't go wrong.Good luck.

Amp makes my jl audio component speakers sound awesome. The city that comes with the amp helps you set the amp correctly. Also very very easy to install somewhere. I have a 2014 Impala the new model sounds awesome in my car.