Atma-Sphere S-30 MK3

Thank you for helping me understand Atma-Sphere products and break in Audiograils.

Your experience is most helpful.

Audiofeil,

I had no intentions to sound nasty or inappropriate !! I was merely saying that I noticed vast sonic changes during the break-in process of the amp in contrast to what you remarked.

" I suggest your ears were acclimating to the sonics and different presentation of an OTL amplifier. "

>>I couldn't agree more on this<<

Thanks for your input and my sincere apologies for the misunderstanding.

AG

Duke's speculation makes perfect sense as a possible explanation. I use M-60 MKIIIs with my Merlins that have very flat impedance with no frequency anomalies that I can detect. Now, I have heard that V-Caps do take a while to break in, but I'm not sure that it would account for what you are hearing. I'm sure Bill has heard every Atma permutation so I assume he has not picked up on this V-Cap breakin as being a possible cause for your situtation. Let us know if thinks improve.

I have the S30 mk3 OTL amp with the upgrade vcap and resistors. The break-in period for me lasted only a couple of days. I loaned the amp from a dealer and for the first day it really didn't gel and I was very close to handing it back.

However, day 2 was different and I started to really appreciate how revealing this amp is. I am using it with a Bent Audio TVC and Avantgarde Duo Omega horns which have a flat impedance of 18 ohms.

The imaging and dynamics of this amp are second to none in my system and I do not hear the hardness that you are referring to. In fact I would say that it is amazing how high you can set the listening level without and strain or hardness appearing.

I am using the amp in balanced mode with Anti-IC's and stock power cord.

Hope that helps in some way.

If I may to offer a differrent perspective.
This discussion sounds utterly familiar to one , that took place in the infamous "Preamp deal of the century" Supratek thread, regarding "glare", that some Supratek owners (myself included) heard in very different systems, that employed Supratek preamps. Our impressions were very similar, but at the same time an obvious minority. The vast majority of Supratek owners couldn't understand what glare we were talking about, and the general consensus in the end of that discussion was pretty much:" Majority of esteemed and experienced A-gon members didn't hear the glare, and the small number of owners, who did, obviously didn't know how music is suppose to sound".
Fast forward from my Supratek phase, and after having some other preamps in my system- Doshi Alaap, and now I have BAT Rex with BAT-75 SE (graciously lended by a friend), I can say with a high degree of certainty, that I just confirmed my impressions of Supratek as very colored, bright and definetely exibiting glare in the upper midrange (not at all dissimilar to "looking directly into sunlight).
To sum it up, my point is this- I think we all have different sensitivity to certain parts of the audible frequencies, especially upper midrange, treble.
It can be attributed to the age differencies for one, and to a multitude of other physiological factors as well.
BTW, I retrospectively think, that Supratek's "glare" is attributed to silver-plated copper internal wiring, used in the chassis (it's point-to point wired).
Now, I'm sure, many will conside my post rediculous, and will continue to defend their own listening experiences, as "the one and only truth", which in the context of one person's hearing abilities, is such.