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Whats the consensus on the SRM-600? How does it compare to other Stax amps? I realize it was most likely designed to pair with the 404LE but how well would it drive the O2? Does anyone have any listening experience with this combo?
We were on holidays in Japan for past fews which gave me the opportunity to visit to a famous audio store in Tokyo (dynamic-audio 5555) which carries a large selection of headphone gear among other ultra expensive audiophile equipment. They have dedicated a room for listening to high end headphones, among which the stax offerings, and top of the line of all manufacturers. The source is of very good quality: Luxman D-06 and the dynamics amps also (Luxman p1u, phonitor).
My first visit was to compare Beyerdynamic T-1 to my Sennheiser HD800, which turned in favor of my current headphones on that particular rig so my wallet was happy on that day. Then, for an unknown reason, I went back some time later with my own HD800 (recabled and modded with foam to kill spurious reflections in the earcup) and made the mistake to also listen to Stax Omega 2 (mkII model) fed by the tops amps of the range (SRM-007t mkII and SRM-727 mkII) connected to the same Luxman CD/SACD player.
From there, it went downhill for my wallet. I am not sure if its the new series that fit my taste or the excellent source but this time, I got mightily impressed with the Stax gear. I had listened to the mkI / previous Stax amps on number of occasions at the same and other stores but never got too excited about it (the source was always of average quality at best though).
But this time, I realized how much Stax got it right... While the HD800 was sounding really excellent through the p1u, the Stax Omega was simply so much more natural / realistic / pleasant / attractive when fed by the SRM-727a amp. In particular, the 3D layer is so much more precise as well as total lack of graininess of the highs. The cymbals shimmer through the Omega 2 is no match for the HD800 when fed by the p1u, I was shocked.
So shocked that ... I went back there again today to listen exclusively to the Stax gear, comparing the different amps with the same Omega 2. I quickly gravitated toward the SRM-727a because:
- It sounds more dynamics than the SRM-007ta
- The treble of Omega 2 mkII headphones appears a tiny bit edgy / forward on the SRM-007ta while it sounds just right on the SRM-727a
- The bass is significantly tighter / more resolved & controlled on the SRM-727a
Then, I compared the SRM-727a to the SRM-600 even though it's actually recommended for the Lamda series rather than Omega. Well, while I was originally attracted by the apparent dynamics / treble extension of the SRM-600, it turned it was just more of the same "issues" as the SRM-007ta when driving the Omega2: a bit hot treble and severe lack of control of the bass notes. One track that I remember sounding completely messed up on both tube amps but right on the SS amp was "S.O.S Mir" by Henri Texier sextet. It's just one jazz tune loaded with bass and baryton saxophon. There were many other examples, but I should point out I mainly listened to Jazz and acoustic pop/folk music.
The SRM-727a amp has 450V of drive capability vs. 340V for SRM-007ta as well as the SRM-600. It may thus be possible that it's the same old trouble with the Omega 2, they need serious power to be properly controlled. I was listening at noon/1PM on all these amps. Also, they were all fed by balanced output of the Luxman D-06 player.
At the end of the day, I actually placed an order for the SR-007a / SRM-727a setup, I am now joining club Stax after so many years of being a hardcore dynamic headphone guy, what a shock! For sure, I am keeping my HD800 and Lehman amplifier though. The Stax combo works best with Jazz / Classical / "soft" music but I am pretty sure I will want to listen to my HD800 at times I want punch over delicacy. As for my Edition 9, it may be time to go...
As for the mkI sounding much better than mkII, I was not able to compare and thus cannot make a judgement. However, as I said, this is the first time Stax gear wins me over so I might be one of the few that might actually prefer the new versions... I have to say also that what got me sold is the SR-007a/SRM-727a pairing, not the others. In particular, I just could not detect any mid-bass hump / funky upper midrange with that pairing. I am thus wondering if the SR-007a is just not tuned for the Stax amps, and does not sound so good with KGSS like the mkI did?
That is all for now...
arnaud