There's no reason to Bi-amp the 602's, the top end is awesome, crystal clear. The tweeter is based on the Nautilus. In fact the whole frequency range is well balanced. I have them bi-wired with Cable Talk 3.1 wire, and it does a decent job. <{POST_SNAPBACK}> I've always had them bi-amped at the job, found them to sound a little different at high volumes when used with a single amp. And i'm just a snob when it comes to speakers