The main driver ( Beta 12LTA ) is powered by 2a3 SET mono-blocks. The Alpha 15 inch H-frame woofers are powered by solid state Dayton APA150 mono-blocks. The super tweeters are powered by a Dayton DTA100 tripath amp. That's a total of 5 amps driving 6 speakers. Pictures of amps to follow and I'll explain how I do it.