Aestheix Calypso owners,tube advise needed

Gandme,

A common theme in all of the threads on the Calypso has to do with the Calypso getting a bad wrap of being hard on tubes, because with the wrong tube the linestage can sound noisy (tube hiss thru the speakers). This has to do with the Calypso having such a high gain compaired to most other preamplifiers. Typically you will see the gain of a preamplifier to be between 12 to 18 db, compaired to 29 for the Calypso. I have had the Calypso over 3 years and have found it not to be hard on the tubes, in fact the tube have lasted a long time. You just need the low noise tubes in the 12AX7 position or lower the gain or both.

Enjoy

2nd what Samhar said about buying NOS, and the mentions about low noise tubes. Kevin at Upscale is very stringent in his testing procedures, and his noise grading is spot-on. You are assured of getting exactly what is stated/promised from him, in addition to excellent guidance in finding the tubes to sate your aural palate.

I have a Rhea and Calypso. I can attest that tubes that would otherwise be too noisy or microphonic can often be quelled with Herbies dampers (but you do have to experiment sometimes to get the damper positioned correctly). You should always have at least a pair of these around. They have saved me megabucks and hassles.

The Calypso 12ax7's don't have to be as quiet as those in the Rhea. I use my Rhea rejects in the Calypso. I'm not sure which Calypso gain setting I'm using but I do remember having to change it when I first received the Rhea. The two didn't interact well with the high gain I had selected for the Rhea.

If I recall correctly I was told by Glenn at Aesthetix that if you select an input on your Calypso that is not connected, turn the volume from zero to eight and listen at each increment in between, you will hear the maximum amount of tube noise that the Calypso will contribute to your overall sound. You may only have to listen at eight.

I have not tried old stock American tubes but have tried most of the Euro's including the 10M. I prefer Philips - D getters (Heerlen, Blackburn) and the Hamburg long plate slanted O getter - in the critical gain positions in both the Rhea and Calypso. You might prefer the sound of a Telefunken or even a 5751. It really depends on so many things, your amps, speakers, listening room, etc. The only way to know for certain is to try different types.

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.

Gandme, I would also treat your Calypso to one of those pricy Isoclean fuses. Yeah, I know, crazy. But it opened mine up to a worthwhile extent, and I now have ~$240 worth of the silly things throughout my system. Power cords also make a difference, in case you haven't experimented with them. Dave