Jadis Fidelity

Oh, by the way, Odiomuse, the JA100s really were designed to run with KT90 tubes; that's the tube for which their transformer was optimized. If you want to use EL34s, as I think you were saying, you might want to look for a used pair of JA80s, which I think sound best with NOS KT88s but which also sound excellent with the EL34s. You may lose a little power with the 80s (I think they get about 40-50 watts with the EL34s), but not that much. Good luck!

Good follow ups, and accurate. Jadis stuff offers long term satisfaction, as other gear might offer certain audiophile checklist advantages without ever sounding more "real". Beautiful gear with high pride of ownership.

I recently sold my Jadis JPL. It was perfectly reliable for 7 years and sounded just fine. Can anyone please comment on the Defy 7 vs. ARC tube amps? Also, a very minor point, but I found the silver and gold finish on my preamp a bit dated over time and the gold surfaces became very smudged and cloudy. Maybe there is a secret to restoring it to its like new lustre but warm water, isopropyl alcohol, a little soap etc did nothing.

Cwlondon, try silverpolish, but very carefully and sparingly, that worked with me. You can use it freely on the chrome parts, but must be careful on the gold.

Detlof, have you noticed any damage to the gold finish with the silver polish? My dealer used Maas(supposedly excellent) cleaner on my amp(said Jadis recommended it), and there is some wearing of the gold. I have been searching for a good way to clean my amp. The factory recommends just a cloth(perhaps damp), which is a joke. And for heavy cleaning, they told me to use methylated spirits(95% ethanol, denatured w/methanol). They specifically told me to NEVER use a cleaner made for brass(maybe that's where the problems with the Maas cleaner arose), as it will damage the gold plating. And told me that they have never recommended Maas to anyone(my dealer in a little white lie...) I have found isopropyl alcohol of practically no use. As a chemist, I fail to see how methylated spirits will do anything if isopropanol doesn't. Not that they are identical, but as close as you get in terms of alcohols(functionality would be virtually identical). It is certainly a beautiful piece. One of the most beautiful amplifiers I have ever seen. That is always the first thing people comment on, before I fire it up(then they're really captivated). But keeping it pristine has been a problem for me. Regarding tubes Odiomuse, I would be surprised if the amplifier you were interested in did not accept EL34/E34L/6CA7. Most Jadis amps will run on these, in addition to 6550/KT88/KT90. The more expensive amps are also usually autobiasing. Mine is not, unfortunately. I have heard many a person say that Jadis amplifiers are even better with the EL34 family of tubes. I know that when I retube I will probably move to KT88 or E34L. Currently, I am using the factory supplied Ei KT90. I think the Czech JJ E34L to be the best of the EL34 type.