These 8 ohm super boys are hemp cone and bad to the bone. I never pushed them hard at all, but the hemp cones are well known to handle ANYTHING thrown at them and still produce that killer tone that A Brown Soun is famous for. I have them loaded in an Ampeg pro cab and they sound killer. These speakers are the best out there...period. I am only selling them because they are heavy in that Ampeg cab and I want to give 12's a try. Check out Tone Tubby here.... http://www.tonetubby.com/ Specifically the super boys can be checked out here... http://www.tonetubby.com/samplebass10.htm These 4 10" speakers are only a year old and just now broke in. They will be packed in bubble wrap in the orginal Tone Tubby boxes they came in and carefully shipped. Retail for these bad boys starts at $125 a piece. Steal these for $75 per speaker shipped to your door in the lower 48. Pics will be added soon. The are in perfect A+ condition. You won't be dissapointed in these 10's. Guaranteed.