Here's an awesome little 1 watt amp I stumbled across from a google search. A kid near Chigago repurposed these old cast aluminum drive-in speakers into a killer little harp amp.
Runs on a 9v battery or you can plug a AC wall wart into it. Use it for recording, busking or even gigs. Has a line out that I plugged into my VHT and I tried it on my Tech 21 power engine... so you can even gig with it. With the gain control you can get all the dirty & clean as you want. It was a $150 + shipping. I love it!