Preamp for Aesthetix / Atma-sphere


Hi

I have the Aesthetix Io Eclipse with volume and dual power supplies, Atma-sphere MA-1 monoblocs (140 watts) and Audiokinesis Dream Maker (93 db sensitive) speakers. These are great components. My question is about system synergy, how to make them play together.

I have been running the Io direct to my amps since I first bought the Mk2 version back in 2004. At the time, I had a Krell FPB600, and in that context, it was a blessing, and a great step up from the Krell KAV 250p preamp. I'll never forget my first impression with the Io - it was like going from the wooded hills up into the mountains. There was no going back.

With volume, the Io functions as a preamp. It looks like a preamp. Someone here on A-gon said going direct is best - which I interpreted as: it IS a preamp! So I thought, OK I have a combined phono and preamp - problem fixed. But it wasn't.

From recent testing I have finally become convinced that the Io does benefit from a separarate preamp. Even if clarity and detail is better going direct from the Io to the amps, the punch and "here-ness" of the music is clearly better with a preamp in the chain, at least in my system.

Trouble is, which preamp? I am testing a small solid state Musical Innovation preamp, which helps with the punch but veils the music. An optimal solution might be the Aesthetix Callisto, preferably with dual power - but I don't have the space, and I already have a lot of tubes and tube heat. I have space for one or possibly two boxes.

From what I have heard so far, a solid state might do the job well (in my tube-rich context), however it should not impart any s-state artifacts or reduce the resolution from the Io Eclipse.

The ideal would be to test a few tube and s-state preamps, and then decide. However, this is difficult where I live, so advice is welcome.

My question relates to my own setup of course, but is relevant for everyone with a top phono stage on the one hand and amps on the other. What is best in the middle?

From recent testing I have learned that problems that I thought were related to the speakers, the phono pre, the pickup and so on, were in fact related to the preamp issue. For example, the Dream Makers straight from the Io may sound a bit lazy and washed out in the bass, very clear in mid and treble but not fully embodied. Plugging in the solid state pre, the situation becomes dramatically different, now the speakers are driving, propulsive. Very enjoyable, but some detail is lost and some transistor things added that I don't want.

So I am looking for a solution with most of the plusses, and not much of the minuses. The preamp must be fully balanced with XLR in / out.
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Ag insider logo xs@2xo_holter
Audiolabyrinth please, let's keep this discussion to the thread title and not get another multi-page historical lecture on your cables.

I have still not received the RCA that I ordered due to advice from Jafox. For the last days, I have been listening to Einstein The Tube with the NOS Siemens/Halske 6922 and Telefunken smooth plate 12au7.

Playing the Beach Boys: Pet Sounds LP (DCC Compact classics edition, remastered by Steven Hoffman LPZ 2006) today, I felt it sounded a bit thin, analytical, disembodied. I changed to the CBS Hytron, and felt it was better, at least with this kind of music, on home ground so to speak. This is certainly a good-sounding tube in the Einstein context, also with Siemens in the phono inputs. Perhaps less treble clarity than with the Tele but the whole more like the way it was meant to be heard. +1 to Albert Porter. This is just one test, maybe my experience changes over time. But the Hytron stays for now, until the RCA arrives. Thanks to all for valuable advice.
I wonder if Einstein The Tube mk2 would sound even better with a bit less gain (it has no gain adjustment, just 12db). This may be influenced by the tubes I use. Not sure, is the RCA 12bh7 tube equal to other 12au7 variants, regarding gain? I noticed no difference in gain, changing from the Telefunken to the CBS Hytron. Perhaps I could try something else, to check if the less gain hypothesis is true.
Charles1dad - "true musical emotion and involvement"
Well said. Nothing else matters really.
Needfreestuff - I was adviced by Brent Jessee (audiotubes.com) that the Siemens 6922s he sells, NOS from the 60s, were almost as good as Telefunken, with a similar sound, for less cost, so I bought them, and use them now for the phono inputs on the Einstein (two tubes). It may be, that Telefunken would have worked better - I don't have them. I followed his advice, since he was right regarding the Io, I got the ultra-low-noise Tele 12ax7s that I asked for.