I have a sample of each type amp in my home;Digital (Spectron Musician II), SS linear Bryston 4BSST, and OTL tube (Atma-Sphere M60 Mk II). After spending weeks optimising the cable/speaker/room/sub for each amp here are the standings:
#1)Atma-Sphere M60. Utterly transparent and deep,informative soundstage. No effort,music just lives and breathes. Bass is organic and holistic. (For you new-agers out there. You know who you are). Does require the assistance of the Zero's on my system to match my 645's to the amp. Useful for winter heating.
#2 Bryston 4BSST. This amp is only slightly less musical and clear than the M60. Detail is great, dynamics are great, sounstaging is only slightly less, bass is also great....though it doesn't quite "breathe" the way the M60's can. Musical with great tonality. A very easy amp to live with.
#3 Spectron. Used to be #1 until I experimented on optimising for the other amps. Slightly more open on top than the Bryston and originally had a better soundstage. A bit dry in the lower midrange, lacks the tonality of the Bryston. Great bass. Great dynamics, just doesn't do the fade to silence decay thing nearly as well as the M60. That dryness just seems to take something out of the voice...but really only if you compare to the other two amps after being optimised. Still a great amp. Coupling with a Bryston preamp brings in more tonality on the low-mids and bass.
#1)Atma-Sphere M60. Utterly transparent and deep,informative soundstage. No effort,music just lives and breathes. Bass is organic and holistic. (For you new-agers out there. You know who you are). Does require the assistance of the Zero's on my system to match my 645's to the amp. Useful for winter heating.
#2 Bryston 4BSST. This amp is only slightly less musical and clear than the M60. Detail is great, dynamics are great, sounstaging is only slightly less, bass is also great....though it doesn't quite "breathe" the way the M60's can. Musical with great tonality. A very easy amp to live with.
#3 Spectron. Used to be #1 until I experimented on optimising for the other amps. Slightly more open on top than the Bryston and originally had a better soundstage. A bit dry in the lower midrange, lacks the tonality of the Bryston. Great bass. Great dynamics, just doesn't do the fade to silence decay thing nearly as well as the M60. That dryness just seems to take something out of the voice...but really only if you compare to the other two amps after being optimised. Still a great amp. Coupling with a Bryston preamp brings in more tonality on the low-mids and bass.