The Best Amp for the Price of Dirt

Zaike...Portable? Not that I know of. But the Behringer a 500 mentioned by the thread starter would compete on price. I have a Panasonic multichannel receiver SA XR-70 that I use for TV and DVD viewing, which includes five amps comparable to the Sonic Impact (but more powerful) that I picked up at Best Buy for 200 and change. It drives three Dynaudio monitors, very well I might add. There is a big difference between $30 and $159.

...$129 to be precise.

Zaike...$159 is the price on the website. I think that Parts Express price is the same. But I'll go with $129 if you accept that the original model has been sold for $19.95.
The darned thing is so lightweight that it's hard to find a way to "install" it in a system. One idea that would work would be to remove the tiny circuit board from the plastic enclosure and build it into some speaker wires as a bulge. Now that would truly be "magic" speaker wires. Connect your preamp directly to speakers.

This might fit the bill:

http://www.audiosource.net/2005/amp100.html

avaialbel here with reviews:

http://www.amazon.com/AudioSource-Amp-100-2-Channel-Amplifier/dp/B00026BQJ6/sr=1-1/qid=1172080518/ref=sr_1_1/105-2069432-8292444?ie=UTF8&s=electronics

can be used w/o a pre.

The Sonic T appears to be the value of the decade. The web reviews are amazing and the amp appears to be a tweekers/DIY delight.

What impressed me about the Berringer A 500's (and return to them) was how much in terms of value I got out of the box . Plug an play.

My reference rig is ruthlessly revealing and not for everyone. The Nova Audio Evolution Speakers in the rig are costly, weight a Ton (1,200 lbs.) and so few have been manufactured I have yet to see them offered for resale. It was a shock to me how well a pair 500's worked into my system , particularly on electronic & classical music.

The 500's only seem to get better with age. Don't get me wrong the S-T is a terrific buy and mated well must be something to hear.