OK, deadmau5, here is an amp listed on ebay, current bid at $29.
VINTAGE HARMAN KARDON INTEGRATED AMPLIFIER PM655 Vxi LINK TO HK AMP ON EBAY
I have no connection with this auction.
I do have a Harman Kardon PM 665 which I use with my M22Tis and a Velodyne 10" sub. The combination is incredibly good. When I say incredibly good, I mean GREAT, WORLD CLASS, KNOCK YOUR SOCKS OFF GOOD. Of course I use it with a world class Sony CA9ES CD player (not all CDPS the same you know). Good luck, have a good time, and enjoy your wonderful M22s