Aesthetix IO Sig V 2nd power supply & Lamm LP2 del

Shane,

You are correct as above - gain setting at ATT4 is attenuated 18dB to give a value of 62dB, not 60 - I was scribing during a quiet moment in the office, so a slip of the pen! The impedance values are as you describe.

My unit was approx manufactured 2 years ago as verified by Jim White, but the manual is revision 2.6 dated April 2002 and there is no reference to the signature version in the manual other than the warranty card. It might be 2002 was the time that Aesthetix recognised the issue with the old Mills resisitors and changed over to the Roederstein. The circuitry has not changed as far as I know from inception.

Steve

Hi,

I have an IO Sig with 2 supplies & volume controls. Its just over 2yrs old so the Mills resistor issue is not a concen with my unit.

I run a Koestu RSP which is .2mV and noise, with careful NOS tube selection, has not been an issue in my set up with re-worked Quad ESLs.

I have had a recent problem with one Power-supply failing(for the 2nd time) & am awaiting the tech's response on this. It was a capacitor last time. So while the sound has bested, to my ears, PH7, lamm, steelhead,ART... the verdict is out on reliability. Does anyone have an recent email contact for Jim White directly?

Thanks, Nkj

Nkj

you can reach Aesthetix here:

Aesthetix
5144 N. Commerce Ave Suite A
Moorpark, Ca. 93021
(805) 529-9901

Jim White can be reached at: jwhite@aesthetix.net

Steve

I have owned an IO Signature with one power supply for over a year now and have about 600 hours on this setup. I am running 62db gain with a Benz LP and 1K ohms. I know that after about 30 minutes the IO Sig sounds better then cold, or this could be the accumulative effect of 46 tubes coming to life with the amps and preamp. I have not tried tube rolling and agree with Rushton about the stock Sovtek's having a magical appeal with the IO Signature.

I would be interested in trying the second power supply also. We are in the process of moving into a new build home and I will evaluate the space in the new listening room.

Rushton, I see you went back to the stock tubes. How was the sound of the other tubes in the system?
V/r
Audioquest4life

Audioquest4life, I will sometime try the vintage tube route again. I've heard good outomes from too many people to not at least give this another try. I just have not had the time to do so. In my sitution, I started with Telefunken 12AX7s in the second and third gain stages, then moved to change out the other tubes in the audio section. At the end of the process, the sound lacked the resolution and image specificity that we prized, and we lost the ability to resolve complex instrumental lines in complex music. Simple music (e.g., singer/song writer) sounded lovely, but the system no longer resolved orchestral music with the ease to which we'd been accustomed. As I say, we need to try the experiment again and spend more time identifying which tubes are doing what to the sound.
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