The 635 will handle that load fine ... I'm currently running an 8 ohm VP100 connected to a 6 ohm VP150 wired in parallel producing 3.43 ohms (or there abouts) through my 635 and haven't had any problems whatsoever. In the past I've also ran my 80s with the 635 at some pretty high decibels and never had any problems.

Rick
Our Room

smile