Do not purchase these amps from the ebay seller riversidetrade they are defective. They were never supposed to be released to the public. The heat sink is to small causing them to overheat and fail. On the good ones the heat sink extends out beyond the case.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...;Category=39739

THanks for the heads up, only Cadence should be bought from JasonPaul, a Cadence Tech.