Need help with Jadis JA200

Gold Lion = Genelex re-issue.The "winged C"s were somewhat brittle in the highs.The JJs can be a firecracker-many difficulties and shipping them doesn't inprove things.The 88-98 is a little less "juicy" in that lower mids/upper bass range.Thus my suggestion for the Gold Lion;-)

Thank you for all your help. This has been very helpful and lots of information to think about.

Trelja, on Jadis site, only KT88 KT90 and 6550 are listed for JA200. I understand that EL34 and KT77 are quite similar but not sure if they would work in this case.

Also, where is a good place to buy from? I looked up a few places, tubedepot.com, tubestore.com, thecableco.com, vintage tube service, upscaleaudio etc. I only dealt with thecableco.com in the past and have been happy with their service but never bought any tube from them. Non of the local store here stock what I need in adequate number so mailorder seems to be the only way.Upscaleaudio seems to have a lot of praise around here but a bit difficult for international order.
Thanks

I used EL34s for years with no problems. Like I said earlier I did find the EL34s to be some what speaker specific. There is a guy in Chicago, Jim McShane, I always dealt with. Good guy. http://pages.prodigy.net/jimmcshane/

You should check to see just how old your Jadis amps are and whether the transformers in them are the originals (optimized for the KT88/6550 or EL34 types) or the newer ones, which may have been optimized for the KT90s. While all of these types may work with either transformer, you might be missing the last word in performance from the amps.

Trelja's descriptions of the sound with the tube types mirror my experience using the similar but less powerful JA80s. My favorites in the JA80s for the music I listened to (a lot of classical and large-scale symphonic) were the original NOS KT88s--6550s were sort of a brute force tube, lacking the beauty and finesse of the KT88s and EL34s, and EL34s just weren't up to driving my speakers in the deep bass.

I will point out that it does not pay to cheap out on tubes for these amplifiers. Every tube that I used in the amps other than the Genelex KT88s would start going bad within a year, while the Gold Lions were still going strong after 4 years. The best person for tubes in my experience is Andy Bouwman of Vintage Tube Services; his prices are not cheap, but with him you know that you are getting what you pay for (and there are a lot of fake tubes out there). I would be cautious with the new Genalex reissues, as I do not believe that they are as well made as the originals.

You have purchased a classic pair of amps with a distinct sound, I hope that you enjoy them as much as I enjoyed my JA80s.