Rockford Fosgate Power T400-4 (Black Box)

Origionaly intended to use the amp for my components but I ran out of money for toys so I am now stuck using this amp to power 2 Dayton Audio 15" reference subs temporarily. The subs are severely underpowered however they still sound fantastic. The birth sheet that came with the amp rated it at 'nearly' 500 watts RMS. Even when driving the amp at its peak output the distortion is minimal (would still not recommend it though). The only problem I have at all with this amp is that Punch EQ 18db adjust knob (only bass control knob that is compatable) can only adjust the rear channels. Not a big deal, I wouldnt use it anyway if it was on the components. The heat dispersion plate works well but if you have it in your trunk with no air circulation it will still overheat after about an hour IF running near full power.

For my ratings,

Value - was a 5 because Sonic Electronix has some of the best prices I can find from a higher end online dealer and I paid less for this amp than I would have for 400 RMS watt at walmart (not sure if walmart even knows that they are supposed to rate an amp at RMS not peak)

Look/design - 5 because I like simple asthetics, I dont need a bunch of flashy lights to show off since the only people that care about that are usually the people that dont know anything when it comes to stats and what the thing is for. I would rather show it off to people for its sound quality

Durability - 5 because I run it as close to full power as I can without getting distortion and it has no problem.

Features - 4 only because you cannot control all channels using the Punch EQ knob. They do make a bass control knob that will do that however it is not compatible with the Power series.

Ease of use - 5... plug and play (maybe adjust the gain and boost level a little bit but it sounded great right from the factory.

Received my amp yesterday and I'm using 4 channel 4ohm output for components. The birth sheet has the power output at 85 whats x 4 @ 4ohm. That's amazing. Sounds great hooked up to my front and rear door type-R components. I couldn't be happier with my purchase. Sonic had this product at my doorstep the next day after ordering.

I bought this amp to power my 4 6.5" door speakers and power them it does. Each speaker is rated at 50 watts RMS at 4 Ohms and I have to turn the gain on the amp way down to keep the speakers from blowing out of the door. The birth sheet shows significantly higher power ratings than is advertised for as well. In my opinion you cannot go wrong with this amp at all.

This amplifier continues in the long line of quality products from Rockford Fosgate. With the proper adjusting of the crossovers and gains this amplifier is definitely sound quality oriented. I have this in both of my vehicles pushing components and my midbass and highs never sounded better. I highly recommend this amplifier to anyone considering the T400-4 as an option to run their mids and highs. I rate this amplifier an A++. I have been using this amplifier for over a year.

This amp pushes extremely clean power to all 4 channels. I'm running Diamond S600s in the front and Beyma W6 in the rear for mid bass. This amp makes this speaker setup sound excellent. The highs are perfect and the lows are tight and hit hard. I definitely recommend this amp to anyone!

Power Series 1-Channel Class BD Car Amplifier • 250W x 1 chan. @ 4 ohms • 400W x 1 chan. @ 2 ohms • 500W x 1 chan. @ 1 ohm • MOSFET Power Supply • RCA pass-thru • Audiophile grade speaker connections

4 ohms: 200 watts x 2 • 2 ohms: 300 watts x 2 • Bridged, 4 ohms: 600 watts x 1 • CEA-2006 compliant • Optional remote bass/treble boost • S/N ratio: 85 dB • Frequency Response: 20 Hz - 20 kHz

4 ohms: 120 watts x 2 • 2 ohms: 240 watts x 2 • Bridged, 4 ohms: 400 watts x 1 • CEA-2006 compliant • Optional remote bass/treble boost • S/N ratio: 85 dB • Frequency Response: 20 Hz - 20 kHz

Power Series 4-Channel Class AB Car Amplifier • 100W x 4 chan. @ 4 ohms • 150W x 4 chan. @ 2 ohms • 300W x 2 chan. @ 4 ohms • 600W x 4 chan. Max • NOMAD protection circuitry: thermal, overload or short protection • MOSFET power supply