recently purchased a set of used heresey's & decided to try the modifications, rebuilt the cross-overs used jensen copper foil in oil caps & solen inductors, rewired with some dh labs wire i had, damped the tweeter with rope caulk & the midrange horn with some black hole 5, lined the inside of the cabinet with 3/4" fiberglass, finally replaced the back's with 3/4" mdf with new binding posts. ok spent some bucks & while the changes were noticeable, i was expecting a drastic improvement, sorry it didn't happen, a definite improvement but not for the bucks i spent! then came this post & i figured, what the heck, nothing to loose, well i gotta admit, this seems to be the cure i was looking for! immediate improvement, the harsh glare from the tweeters was gone, did not seem to effect volume in any way, just eliminated the listener fatigue associated with the heresey, some may not agree but thanks for the post, i'm impressed with the results. was thinking about selling the heresey's but now i'll rethink that decision.
thanks
mike