Summary: I kept my stock head unit since it has an excellent tuner in it. One of my original speakers was blown. However adding this amplifier to a complete set of 4 6.5" Infinity reference component speakers has created fantastic sounds in my Avalanche. The Infinity speakers are rated to handle 90 rms peak and the unit puts out 75 rms so it's as perfect as you'll get. The clarity, as well as bass and highs is excellent. Thank you Crutchfield for a great price on a great product.
Summary: Purchased this amp with the advice from a sales associate. It runs hot so have it in an open area. I was only able to get 2 1/2 years out of it tops before issues. It went into protect mode on and off. I called to see what it could be I was advised that its probably the speakers. So I purchased all new speakers. Wasn't the speakers it was the Amp.. I have an old Sony amp pushing my sub that's way over 15yrs old and it still works.
Pros: Produces good sharp sound
Cons: Can not depend on it working. Check reviews elsewhere. Lots of issues .
Summary: THIS AMP ROCKS. 5 Channels, so I hooked a component set (6 1/2 door & Tweets) + Rear (Infinity 6 1/4) and the 5th channel I hooked a tear shaped box with 4 POLK 6x9 Woofers in it. All sounds exactly how I imagined...
Summary: A very solid amplifier with good sound quality, and plenty of power. It pushes my polk db 6.5" component's and infinity 6x9's to their limits. I've had the 475a for 4 years now! This is the only amplifier I've had to not quit on me (mostly class D subwoofer amp's like the alpine mrp-350, mrp-1000; great amps, but gave out...). For me, the volume is at it's limit, or else I'm not listening to music haha.
Pros: great sound for the price
Cons: definitely runs hot - but who cares if it lasts?
Summary: This is a fantastic amplifier! So much clean power! I've got it hooked up to a Pioneer deck with 4V pre-outs. My speakers are Polk DB 5.25 components. I have the amp gain only at 25% and the speakers get killer loud and retain crisp sound clarity. I got this amp when it was on sale, so I could not ask for more for the price.
Pros: Powerful, clean, affordable
Cons: It's an older model amp and with that comes a larger size. I had plenty of room, so this wasn't an issue for me, but if you have a small mounting space you should consider looking at newer more compact amps.
Summary: I recently purchased this amplifier to replace my kicker zx650·4. I expected a considerable decrease in sound quality. But I think this amplifier sounds just as good for half the price...very nice amp.
Summary: I'm powering 4 Infinity Kappa 6x9's in my 05 Magnum and other that getting REALLY HOT it gives off GREAT sound and I can't turn my Head unit past 25 of 35 or I might get a ticket........AGAIN!!
Summary: I used this on my two pairs of Infinity Kappa 6.5 components and sounds great, good quality. Has a good power output and clean. Its a stable 4 channel amp and has good eq features. Good looks too.