I have had some trouble with the driver of one speaker, when you say (recommended amp power anything from 30 to 500 watts depending on the quality.) what are we talking about, I blew mine with solid state Kenwood amp at about 70 watts (thats what the led showed) this is the second time 200.00 a pop to repair. What do I need to do to keep this from not happening again, I should say its starts clapping then before I can get to it speaker blown.