i just upgraded my pro v2-400 with the cp1 and some 16 gauge wire with gold plugs and despite what some of you might say, there IS improvement in overall sound. not a significant difference, but very noticeable. anyways, klipsch i cannot praise you guys enough for these speakers. i have many friends on my hall that decided against klipsch. going with boston acoustics, midilands, altecs. they're utter fools and now they wish that they had my speakers. they thought that we'd be going to their rooms to watch dvds. haha. i don't think so. way to go klipsch. keep up the good work. i will most definitely purchase future klipsch products.