Price, THD, Low Pass filter

none.

Sweet Amp, bought it because of its low THD(I found it to be between 0.01% and 0.009% actually).. Great output power, using it to power new Alpine 6x9s and Blaupunkt GT6 6.5 inch splits, buying another to power a Alpine Type-S 10" Sub, Sound quality is great...

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Clarion, Blaupunkt, Alpine... Better than B.P amps, as good as clarion, Alpine just has a fraction over it, but this amp was some $250AUD less...

Flexiblity of setup, quality for price!

none.

i bought this amp over a kenwood one of lesser output, and for around 30 dollars more. (120 canadian i paid after some bargaining). i am very pleased with it, seems to be an awesome amp for the money. powerful, flexible setup options, gold plated terminals, low distortion rating (0.01%), high/lowpass, bridgeable, 2 ohm stable (in stereo). no complaints at all, and an awesome price, highly recomended.

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only ever used pioneer before, this one is more powerful than the pioneer.

It cost me 100 bucks for this amp. It now has a cool neon blue light on it and comes with a 3 year warranty. The amp puts out alot of power and is rated at 12.9v so you know its more accurate then most amps.

Only thing is it does not come with that good of mounting kit.

Overall USacoustics is the best amp for the price. I have the 2050 and the 2080 and they both are great.

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MTX, Kenwood, ALpine

This is a very good amp for the money.

The noise that my electrical system puts out is very noticable. Also this is my thrid amp from them because the first one I fried, the second one was defunctional, but the third and last is a winner. I would still consider this company in the future. I am also happy with Crutchfield's return policy.

I would recomend this amp to anyone who doesn't want to put a lot of money into their car stereo but still wants great sound. They are also made and engineered in America.

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Rockford Punch 120a (30 X 2) it sounded about as good and almost half the price and with more power.

Clean power, high pass and low pass crossovers, preamp outputs

90 day waranty

I paid $110 for it from Crutchfield. Very good amp for the money. I have it powering two Kenwood 6x9's and they get loud and clean. The preamp output is very helpful for head units that only have one output and you want to run more than one amp. I would definitely recomend it if you want good quality on tight budget.

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never used any others but it compares in specs to Sony's that cost $50-$100 more.

Good performance for the money. Also very reliable. Flexible setup options. Built in crossover, but I don't need it.

Nothing yet.

I have my USAcoustics bridged mono running a 10" sub in a sealed enclosure. Never been anything but please. My brother has had one for about a year longer than I with a similar setup. He's still happy. The USAcoustics amps have to be one of the best amplifier values available.

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Sony, Blaupunkt, Rockford Fosgate - Better than all but the Rockford.

Very reliable. Never had any problems with it. Very small. Easy to connect and use. Especially like adjustable low-pass cut-off frequency.

Nothing, really.

I purchased mine from Crutchfield for $120 or $130. This is a great amp for a lower-power system. I use mine in bridged mode to power a single subwoofer. I would highly recommend this amp, mostly because it is the same quality as better-known brands for a lot less money.

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I've used some Rockford Fosgate and Sony amps. I would say that the USAcoustics is better than the Sony and as good as the RF.