Matt
Richard Vandersteen designs and builds his own amp for the speakers as far as I know. I understand your comment about the powered speakers. However I can tell you for sure whatever amp, preamp, cable etc you change in your system does make a change on the Sevens even though they are self powered. I changed the Caps in my BAT VK 600 SE to the new caps from the 655SE and heard even that difference in the bottome end from the amp. So don't let that be a concern of yours. The Sevens bass is incredible and the ability to tune the bass to your room your listening tastes is something that is not only unique but in my opinion necessary in a high end speaker. The placement of the speaker in the room for the best imaging and soundstage and then tuning it to your tastes and the best seemless integration with the midrange is so important in the reproduction of music. No other speaker has the ability and then have the timbre qualities of the drivers that Richard uses. See my review on Agon of the Sevens I posted a few weeks ago.
Jeff
Richard Vandersteen designs and builds his own amp for the speakers as far as I know. I understand your comment about the powered speakers. However I can tell you for sure whatever amp, preamp, cable etc you change in your system does make a change on the Sevens even though they are self powered. I changed the Caps in my BAT VK 600 SE to the new caps from the 655SE and heard even that difference in the bottome end from the amp. So don't let that be a concern of yours. The Sevens bass is incredible and the ability to tune the bass to your room your listening tastes is something that is not only unique but in my opinion necessary in a high end speaker. The placement of the speaker in the room for the best imaging and soundstage and then tuning it to your tastes and the best seemless integration with the midrange is so important in the reproduction of music. No other speaker has the ability and then have the timbre qualities of the drivers that Richard uses. See my review on Agon of the Sevens I posted a few weeks ago.
Jeff