Thanks for answering. He has a Denon 300 watt (2 channel - 150 watt per channel) amp. After he couldn't seem to keep these from blowing, he bought from the Synergy Series KSF 10.5. They are great. He wants 2 more speakers to creat more of a surround sound in the room, there in lies the issue, do we try and fix the Heresies which are great too, or do we buy the bestest out there right now. That is my next question I posted under the General forum, which Klipsch are the best out there right now in your opinion. Thanks for all your help.