ahhh..i see..didnt know that..i should have done more research..i now have a dread2 powering them..still..much better than the other amps..but lacks that spine tingling feeling..the irony is i gave my brother the nad and he is running 800 dollar polk audio spkers and man...like a hand in a glove..jaw dropping clarity and body..we were shocked..his rig is running about 2.5k..im at like 8!!!..and still..on some levels..his sounds better!!..