Aestheix Calypso owners,tube advise needed

I have Teslovak E83ccs in the 12AX7 positions

Pdreher- Thank you for the advise...I don't know much about the tube world and I am interested in the difference in tubes(input stage vs output) and how they can change the presentation of solid state amps. My Aleph 3s have a very natural sound compaired to most s.s. amps I have listened to. Should I consider this as a factor in my tube choice?

Thank you all for the good advice. I checked the gain jumpers in my Calypso and they are in the low gain position. I did not think I had a noise problem...but after trying Viiu's test I had a considerable hiss at the 8 volume setting. My last preamp was a Pass Labs X-0.2 and it was dead quite.
The sound I am looking for is similar to my X-0.2, very transparent and detailed but with a more natural presentation from top to bottem. My system at this point sounds like someone threw a blanket over my speakers... as if the sound has been muffled slightly.
I was not sure replacing my solid state pre with a tube pre would be an improvement...but I thought I'd give it a try. My objective was to reduce the amount of money I had tied up in my system without losing any qualities...build, esthetics and sonic performance. I have come close but my preamp is still lagging behind the Pass Labs X-0.2 in overall musicality. Hopefully with your tube recommendations I will be able to do so. Thanks to all.

Dopogue- I have looked into audio fuses and power cords. I believe they have a place in my system. I am of a mind that they account for a very small % of the overall sound. So they are on the back burner. I say that now....but who knows what I will do tomorrow!!! I just spent $350 on tubes for my Calypso...Made a call to Brent Jesse and pealed out the Visa.

Jd - I talked for some time with Brent Jesse and took his recommendations on my tube selection. I told him my taste and what my system consisted of and what tubes were recommended by Audiogon members in this thread. I bought a matched pair of nos Telefekunken 12ax7s smooth plate, 60s vintage. A matched pair of nos Amperex 6DJ8s Bugleboys 60s vintage. I was looking for a transparent, detailed, natural sound without any coloration. Basiclly I want the same thing my Pass Labs X-0.2 preamp gave me but at a lower price point. My used Calypso came with 2 sets of 12ax7s (seller had a bad packing day)so I ended up going to a small electronics shop in Marin (north of San Francisco)and buying a pair of nos Sylvania 6DJ8s so I could get up and running. I am not disappointed with the sound I have now...but it is not up to the standard I was use too.

AQ4life- Thanks for the Blackburn tube info...euro prices? about $60usd?.

Mds- I decided to start my tube setup with a neutral
sound...a place to start. The Telefunken/Amperex combo was recommended by some in this thread as did Brent Jesse. I replaced my S.S. pre not because I was searching for a better one, I needed the money. I sold my mono blocks, preamp, best CD players, very good wire and my Car! I replaced all with good "less expensive" equipment. I have come up with a better than expected system. I was not looking for a "tube sound", I was looking for the best sound for my taste that I could afford. I realise every piece adds it's own sonic signature to the music. I rely on my ears to decide if it sounds natural...nothing added...nothing taken away. I'm sure I will try different tube combinations in the future..that's what you guys are for...telling me what I am missing and what will sound better in my system. I do appreciate all the input!

Not to jump the gun.. I am still in the nos tube mode. Who does the signature upgrade, Aestheix or an after market co.?