I see, so it sounds like the 215's can take more than the 12000 can dish out as long as the HPF is in place, which it should be with a ported sub.... errr... I mean speaker.I don't know what bad sounds your talking about. But when I pushed them with out the HPF during those intense low frequency scene. I could here some kind of harsh vibration when those low notes are producing. I figured I was at the limits of the woofers. So when I added the HPF then all is good. Also with the HPF, I've pushed them right before clipping with a 3 db boost from 110 hz down. No noise, but wow, that's friggin loud. I already was at -2 just about the first clip light on the output start to light up on the pod imerge scene. With music, well I can pushed them to +8 without hurting my ears. Though music dependent. But, damn, these speakers can really be pushed yet so clean. Friggin amazing! Btw, on the input.. It seems I have it around 1-2 lights less then the output just by monitoring it through the Inuke DSP interface through the LT.