Audioengine was founded by a team whose members had backgrounds in the audio, pro-sound, and computer industries (specifically, Apple Computer), which is a formula that has helped the young company stay at the forefront of the interrelated iPod and desktop audio revolutions.

This amp is beyond what I expected, and it comes is a very small and elegant package. I am using it to drive a passive subwoofer, and it does a sterling job. If you are looking for hifi quality amp, with an extremely small footprint, buy one of these and you will be very - very happy!!!!

I'm very impressed with little amplifier. The sound is very transparent and warm. I use with it a BlackBerry Audio USB cable, a Musical Fidelity V-DAC, V-PSU and drive a pair of Audioengine Passive 4s. Using Apple Lossless as a source it a great little sound system.

Just got it, so will update after some use. Be aware it may come with a US plug (mine did). Very nice aesthetically and sonically, just about drives my 600ohm AKG K240 Sextetts at full volume. Noise was present when plugged into an extension lead, so it's now plugged directly into the wall.

I put some thought into buying this amplifier, as I have had two bad experiences with buying amps on Amazon. While Amazon's customer service folks were GREAT, and accepted my returns, I really wanted this one to work. I already have Audioengine speakers and they are just excellent.

Exactly as advertised. Works well. Fits on my desk well. Only wish it had Blue tooth capability or the capability of plugging in my blue tooth transmitter on the back. Could have used two USB hubs instead of one. But it is great for my system and as advertised. Chuck

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