Yes, they are very sensitive to all changes made upstream and positioning as I've mentioned before. More so than any other speaker I own. But they don't sound bad with the changes , just different, so you can really season to taste. In contrast my Vandersteens (3A Sigs) require you to get them just right or they will not perform and you will be frustrated! Once they are dialed in with just the right positioning, tilt back, etc, they come to life. Tektons change but always sound good when you change. In other words they reveal everything. This weekend I'm going to see how the Mosfet based Counterpoint Solid 1A fares. It's been out of service for a few years and now it's been fixed. More of a tube like sound vs the PSE amp (Bipolar) which is very clean. I really like the PSE amp so with the Tektons revealing capabilities I'm sure I'll be able to hear the differences in the sonic traits of these 2 amplifiers.