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
Experiences from other Audiogon members regarding The Tube, especially in combination with good tube phono stages and amps, are of course very welcome too.
Ditto HMS Donovan, the original Dawn double LP - amazing, an overlooked gem. This preamp makes Donovan a folk singer, quite rightly, but I can hear him rock out too, no problem. Donovan took the consequence of "the youth revolution" and created a double album partly to children, and with children's music, but it seems, this was too much at the time, it was ignored. His guitar work is rich, melodic and unique, especially on his 'adult' songs. This is his Sgt Pepper - taken to a different place.

Albert, when you tested the preamps, you obviously found them all good, but they brought some different plusses and minuses to the table. Could you tell a bit more, regarding The Tube?
O_holter (System | Threads | Answers | This Thread)

There was almost unanimous opinion on order of to rank but you're correct, each of these were high quality and performance. The Einstein sounds more solid state than tube but your trial with CBS Hytron shows it can be more musical.

Our test involved ten different preamps and/or phono stages plus combinations of brands to find what effect that would bring. We did our best to find tubes that brought out the best in each design. I have hundreds of tubes on hand, making that part easier.

There is noting wrong with the Einstein, it has a personality as does every piece of equipment. The goal is to achieve best sound and final decision involves the room, the speakers and all the other components.

The Einstein phono stage was judged better playing into Aesthetix Callisto than it's "mate" The Tube. Oddly, the Einstein single ended phono was chosen over the XLR version.

Something not mentioned so far, the Einstein responded to AC cable as much as interconnect, so don't be afraid to borrow and try a few brands.
Try the RCA 12BH7 tube in the Einstein's 12au7 socket. Magic magic magic when I tried this during an audition of the Einstein Line Stage vs. the Callisto Sig. I had at the time.

The coolest thing about the Einstein was that you can optimize the tube for each line input