Any one had probs with these speakers? I bought a pair about three weeks ago, I'm on my second pair as the vioce coil went in the first pair! and now the replacments have failed. im getting a wee bit *&$& with them! I've also heard that the pioneer 2011 doesnt really get on with lower inpedence speakers (the wharfs are 6 oms)although i have set my amp to the six omhs setting could this bugger the speakers PS I havnt done anything stupid with them or cabled them up wrong!