These responses are very much appreciated and I will attempt to explain further what I have done. To begin with, my present setup consists of a Shanling S100 solid state CD player, California Audio Labs tube DAC, Rogue Audio Shinx hybrid amp, and two pairs of permanently A/B'd speakers. For many years I have used the Martin Logan Odyssey hybrids and, recently, added a pair of Jamo Concert 8's on a permanent A/B switch between the two.
Both pairs of speakers are very good and I recently added the Jamo's because they are more efficient than the Odysseys allowing me to listen at lower volumes while maintaining detail and tight bass. This particular model by Jamo, btw, is incredible in almost every way.
Probably the biggest single improvement came with the addition of the tube DAC but close behind was increasing the speaker elevation. As a matter of fact, of the things I've tried, these two changes were the only ones that I could detect any resultant improvement. Between these two things, I'm enjoying my system more, although I know I'll never get back what I've lost over the years to compromised hearing.
As far as room treatment goes, because my listening room is also our living room, my options are limited. The room is 15' by 21' with the entertainment center placed against one of the short walls. Furnishings include a large area rug over wood floors, 18' of curtains on one long wall and a lot of upholstered furniture. Even when the floors were all wood, before my hearing became so messed up, this treatment, though a compromise, worked well for me.
Lowrider, I'm especially glad to hear from someone also afflicted with hyperacusis because at least someone out there understands the effect that this condition has on critical listening and, to a lesser extent, every day function. Mine is accompanied by very loud ringing at more than one frequency somewhere between 5 and 7,000Hz, according to the audiologist. It seems that tinnitus and hyperacusis often go together. I've found a couple of hyperacusis forums but never one associated with HiFi listening; if you know of anything like that, please let me know.
