please keep us posted. Very interested in this comparision.
Some short notes on what I have so far, comparing a ...
- KGST
- SRA-3
- SRM-323S
- SRM-006t
- SRM-T1W
- SRM-T1mk2 serial A**** (TBD)
- SRM-T1mk2 PP (TBD)
- SRA-12S (TBD)
Tests were with an ED-1 and Sigma Pro NOS late version and I only listen to classical music.
The KGST is the most accurate of the bunch probably. It has the largest 'space' - it sounds like you kind of poke your head into the concert hall, probably due to it having the lowest noise floor (just a guess as to what I'm hearing). It also has the most headroom, big dynamic peaks (many in classical) are handled with ease. The bass is generally better defined. Given that it's also the most fatiguing. This could be due to my upstream DAC - or not, but regardless it does get tiring after a while.
The SRA-3 is a very sweet, very forgiving amp. Wonderful with Normal phones, especially shines for vocal Sonata or Lieder (e.g. Fischer-Dieskau Schuber Lieder), or Bach harpsichord. On this one I used a pair of Normal bias Sigma so some difference there.
The 323S is the most energetic of the bunch. With boom-boom music (Rachmaninov, Nielson) I prefer this one, it's a wonderful match with a Sigma as it really punches through. Some loss of detail, but conversely it's somewhat more relaxing to boot in that regards. Needs about 5-10 minutes warmup
006t version 1 - the most fuzzy and warm of the bunch. This is a rare NOS one I got from a guy who bought it new as a backup. Warm, forgiving and the most fuzzed out - which doesn't detract. Great for when I just want some no-nonsense relaxing music, say Haydn string quartets.
T1W - wonderful amp. Rich, a little warmer than some others, not quite as detailed as the KGST but a little forgiving too. Excellent cup of tea for anything up to large ensemble, and there too for Classical era symphony (e.g. Mozart, Beethoven). This one takes about 30 minutes warmup before it comes together, it really does.
More to come in a few weeks ...