http://cgi.ebay.com/NEW-HIGH-POWER-...Z015QQcategoryZ10171QQrdZ1QQcmdZViewItem

Or howabout these 150W guitar amplifiers for $22, plus $20 shipping, with a 5 1/4" speaker.

150W.... yeah right!

Or I always see things that say 20W RMS, 80W peak.

Well Peak W = Vrms * sqrt2 * Irms * sqrt 2
sqrt 2 * sqrt 2 = 2
Vrms * Irms = Prms
Therefore, Prms * 2 = Ppk
20 * 2 = 40
hmmmmm..... 80? Yeah, suuuuure!