OK, first of all you are dealing with a fairly powerful amplifier here (260 WPC, RMS) according to original owners manual specs. which means that the speakers you buy should be able to handle at least 250 watts RMS. I recommend a 3 way design speaker (tweeter/mid/woofer) in order to appreciate the sonic quality of this amplifer. In terms of a preamp, ADCOM makes excellent preamps which would be well suited to this power amplifer. You can also try a yamaha natural sound preamp.
