System this amp is servicing: A mustang car: Fronts 6.5 component set, Focal 165 KRX2, which are 2 ohm each side, rated at 100 w rms each side. Rears, Polk MM571, 2.7 ohms each, and are rated at 90 w rms.

Previous amps: Kicker IX500.4, Kicker ZX650.4. Kicker ZX650.4 is just as good as this amp, but it's 20 inches long. This RF T600-4 (just under 15 inches long, which is the reason for purchase) is a little bit stronger, sounds almost as good (Kicker has better noise filtering). Noise filtering is the weak point in this amp. It's not much engine noise, mind you, but it's there. Fortunately, the amp is too strong for my speakers, so I can almost, almost eliminate the noise but turning the gains down lower than the SMD-1 (great device by the way I purchased here at Sonic) calls for them to be at.

I have learned its best to get a too strong amp and you can always turn the gains down lower than they should be, rather than too weak of an amp, and turn gains up beyond where they should be. I also do NOT use any bass boost.

Overall, great amp, very pleased. My specs on this amp's birthsheet: 122 x 4 @4 ohms, 189 x 4@2 ohms, 379 x 2@4 ohms

The brand alone is worth buying, Rockford quality with amps is impressive.
Ab class goes effectively with the T3s pairs I have running, sounds crisp and loud!

This amp is freaking awsome! The one I have, the birth sheet has it rated at 227 x 4 @ 2 Ohms thats 127 watts over what it is rated, wow. This amp is powering a set of T2652-s 6.5" components and 1 additional set of T2T-s tweeters, along with 2 - T1693 6 x 9's. This is an excellent buy for anyone.

My amp came with a birthsheet stating 130wrms x 4 CH @ 4ohm. Which is awesome. Sounds clean and crisp with the RF T2 splits.

Great amp! The sound (loudness and quality) is great! All I could have expected. Great over the phone technical installation support from the supplier!

I purchased this amp along with the rest of my gear at the same time Rockford Fosgate type-(T1652-S, R1653 and P1S4-10). The whole package in my 2011 Chevy Truck is CRYSTAL CLEAR. The Sub Bumps nice and tight. SOLID piece of Gear. GOOD Bang Power Clarity for my setup.

I love this amp! I had a JL Audio 300/4 v.1 prior to buying this amp. Actually I had 2 JL's and they both went bad. Decided to get a Rockford and never have regretted it. Very dependable, doesn't overheat when I drive it really hard. I have CDT speakers and they demand watts and the Rockford 600-4 delivers. Noticed that the Rockford sounded so much better than the JL. I cannot understand it, but it is what it is. Buy Rockford, you will never regret it. Oh, by the way, I've had the 600-4 for a year and half and it just keeps crankin out the music, no problems. I like the phillips screws for wire connections. You'd be crazy to buy anything else!

T-600 great amp powerful and delivered just like they said. Only problem for myself matching 6x9 or bigger I melted all voice coils. I want to buy most powerful RMS speakers 4 pairs and add T-1000/4.

I switched from my Alpine 4 channel to this bad boy. This amp is the best component amp you can buy. Mine came rated at over 140 watts per channel at 4 Ohms. Had to turn the gain down to not blow my speakers. Amazing amp, worth every penny. Trust me, you will not be disappointed.

Out of the box the spec sheet included said this amp was rated at 133 watts RMS at 4 ohms, tested in Dec of 2010. Awesome... more power just like that! Get some good speakers that can handle the juice. I have Rockford Fosgate T2652-S components in my front doors and I bridged the rear channel to power my 10" JL Audio sub in the trunk. I couldn't be happier with how great everything sounds. Nice, clean stable power is what you get with this amp. I also got the Punch remote hooked up to this amp so I can make adjustments from the front seat. The adjustments this remote makes is more like a fine tuning. This amp feels heavy and actually smaller than I imagined for getting so much power out of it. Would def recommend.

This amp is a work horse in a small chassis would recommend to anyone looking to get that edge in sound quality and power..... Great buy

This is one of the best amps I have ever owned. Stands up to everything I can throw at it and never backs down. Great piece of equipment and puts out way more power than rated. Mine out out over 150 watts per channel at 4 ohms and over 250 watts at 2 ohms.

This amp is the best component amp you can buy. Mine came rated at over 150 watts per channel at 4 Ohms. It quickly blew one of my Rockford Power 6x9's! Rockford is gonna have to come up with some more powerful speakers or else I'm liable to blow all my components lol. Amazing amp, worth every penny. Trust me, you will not be disappointed.

This is a sweet and small amp (for the real output). Well over 100 watts at 12 volts, I tested it (my birth sheet says 131 at 14.4 volts) not to many manufacturers can say that they even have one four channel that can do that, Rockford has a few and as always the quality you have come to expect from Fosgate. this thing will surprise you with its weight. The value is there, the performance is there, if you are thinking about stepping up to a real 4 ch. then do not overlook this one.