Hi. I had RS1B speakers and I powered them with an Acoustat tnt-200 and/or tnt-120 amps. I ended up selling the big Infinity speakers, but I kept the amps. Now I need to sell the amps. They work perfect and are in very good condition. I want $650 for the tnt200 and $450 for the tnt120. If you want both, then I can do $1000 plus shipping. Pickup would be great but I am near Erie, PA. Let me know. Jeff