I cannot accurately judge the ultimate sound quality of this amplifier, because I don't have it hooked up to a set of top notch speakers. It's powering a set of Radio Shack Minimus 7 speakers, and it does a fine job at that. Sound quality is very good, and it will play very loud, even with these inefficient speakers, without clipping or noticeable distortion.
Build quality is not great, though. Construction is cheap plastic (what else can you expect at this price point?) and looks, well... cheap. But if it's tucked behind your laptop and nobody can see it, then who cares? This is my second unit. The first one dropped the left channel after less than a month of service. Disappointing, but not entirely unexpected in an amplifier this inexpensive. I now make a point to turn the unit off when I'm not using it to maximize its lifespan. I'd gladly pay ten bucks more for a simple, extruded aluminum housing, I think.
Verdict? For less than $[...], you can either buy this small, good sounding amplifier, or go to a pawn shop and buy a 1970's vintage HEAVY receiver to do the same job. The sonic impact amp is far more portable and takes up much less desk space. I'm happy with my purchase.
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