I am looking to improve the fuzzy/warm midbass and LFs these give me while maintaining the pleasantly engaging mids, acceptable clarity/resolution and dynamics. However, if I can improve upon the latter too, then great. I have a custom built tube amp and for now I prefer to stick with using tubes. I realize that using tubes does not help the HD650s. But I have the same overall impression when they are plugged into my portable gear with or without my SS portable amps. I should point out that my current digital sources are as follows:
1) Main system - Exemplar modded DVD 5910 with tube output stage and balance out option. Also have an APL modded Philips SACD 1000 with tube output stage. It's on its last legs and will eventually be paperweight. However, if I am good, it's playback is oh so good for only about 20-25 minutes each day until it decides it wants to rest ;-)
2) Office system - APL modded Pioneer 563a (SS mods only)
3) Portable system - iPhone 3GS to RSA P51 Mustang or iQube V1
As to sonics, I prefer a smooth, natural presentation. I am lucky that I am exposed to the sounds of non-amplified natural voices and instruments (orchestra, quartets, small ensemble, piano, etc.) 3 - 5 times per week, and these are my sonic reference when evaluating if i keep or replace audio gear. Don't get me wrong. I like to rock/funk/groove out and also listen to great thumping soundtracks. However, it is a high priority that my system get the tonal balance and natural timbre of voices and instruments first. I figure if a system can get these right, then recordings of amplified or electronically processed voices or electronic instruments will sound they way they were recorded - good or bad.
So please suggest away without concern for cost. However ,as the world of IEMs have made consistently shown, great sound and high prices do necessarily go hand in hand. TIA.
Edited by ctm - 9/24/10 at 10:20am