The eight π speaker is great for SET amps. Generally, I'd consider it a better choice for low power SET amps than Stage or Professional Series Speakers.Stage and Pro Series speakers are designed for use with amps having a little more power than most SET amps. There are some exceptions; I'm running my Stage seven π's on a 2A3 SET and it sounds fabulous. But the eight π speaker is designed to be used with low power amps, from 1 to 100 watts.