may or may not be useful, but i thought i'd share it with you :)
quite rare, old skool RF amplifier, back when they knew how to make amps :D
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&rd=1&item=5762587621
will do 2 x 50RMS quite competently at 4ohm, which is plenty to run some...