Jadis ja-200 vs ja500


Does anyone here have experience with these two amps? 
I used to have the JA800 (3 units) and loved it but unfortunately had to sell it when I moved overseas. Lately, I have been considering going back to the big Jadis, but I wonder whether it should be the 200 or the 500. I know the 200 is class A and the 500 is A/B, which means the 200 gets very hot and might be more colored than the 500. By the way, I am talking about the old models circa 2000. 
At the moment I have JA30 and Luxman m900U, and I am looking for an amp that would be able to combine the traits of both of these. As far as I remember, (and that was 20 years ago), my old JA800 was just that.   
taviran

Showing 2 responses by rcprince

I agree with zipost; I felt the 200s had more finesse and character than the 500s, which were more a brute force amplifier.  Plus, with the older Jadis you're looking at, the JA200s were auto-biasing and could use tubes other than 6550s, while I believe the JA500s were not auto-biasing and you had to use 6550s unless you got a tech to change the bias.  As an aside, I think the best-sounding Jadis amps were the lower-powered JA30s and 80s; if you don't need the power for your speakers your JA30s would be difficult to beat--you might want to try using different tube types in them (EL34, KT88) and different brands of driver tubes to tailor the sound to your liking..  
Well, not sure about the sensitivity and impedance figures for the ESPs (their website has no information about their models, from what I can see), but I'd say if you want that sense of ease the 500s might be your ticket.  When I heard them they were driving mbl 101s (the original model) with no strain, so I'd say they could drive just about anything.  But, despite not being pure class A, they will throw off more heat than the 200s, simply from the larger number of tubes in them.  The setup with the mbls had the 500s in a separate room to keep the heat down in the listening room.