YOU'RE WELCOME. And talk to Ty Moyer when you deal with ASC. He's a very cool guy. The Frescoes are free standing, and should be used at the "first reflection points" on the side walls and the wall behind the speakers. Use 16 inch or larger "full rounds" in the corners behind the speakers. IF YOUR LISTENING SEAT IS CLOSER TO THE WALL BEHIND IT THAN THE WALL BEHIND THE SPEAKERS, put something like a small (portable) chair about 2 or 3 feet behind your listening seat, and balance a large, stiff pillow on top of that. THIS WAY, YOU WON'T HAVE TO TREAT THE WALL BEHIND YOU AT ALL. Also, don't listen in the nearfield (closer than 7 feet from each speaker in a large room), OR YOU'LL BE SEDUCED BY THE LACK OF ROOM ANOMALIES, and GIVE UP trying to fix your room...heh heh. AND YOU CAN BUY YOUR TUBE PREAMP AFTER YOU GET YOUR ROOM DIALED IN...cause you'll need the room COMPLETELY dialed in before you evaluate high end preamps.