Facts are
1) had not consulted with tech guy
2) Jadis no where says , can not use 150 in Defy
3) had no idea Jadis did not employ a separate bias screw for each tube
Had I consulted with randy Cohen,,,I am sure his research would have advised against using the 150,,,Randy kept calling, this is not the tube for this amp,, I had bought the tubes, unaqware of these isssues, = too late to return.
My loss of $400.
anyway.. have perfectly matcherd 6550's comming in 2 weeks from vivatubes.
Jadis for some odd reason , did not employ a separate bias for each tube.
**Aesthetically it does not look beautifull tom placea separate bias screw on top of chassis.** End quote of Jadis engineers.
Well Cayin figured, screw aesthetics,,, its practical and intelligent to placea bias screw on top of chassis, so owners can decide on which tubes they want,,and all do not absoluetly have to be perfectly matched..,. Which is why i recommend Cayin over Jdais. Cayin is the superior amp. Jadis is 2nd place, by a mile.
So I am having most electrolytics changed out,,, not sure if Randy talked me into changing the 4 big electros,, have to call him today...Its about 20 electros, not counting the 4 big ones...anyway,,,mods are in proress and hoping for better things to come.. Have to get over the big loss of the 150's,
I would never bea fan of 150's,, neither 120's. Its a shootout of kt88 and 6550 for me.
They both look exactly same construction, The 88's i have are chinese, the 6550's, are russian. so basically its a shootout between china and russia.
My guess is yhe russian will offer a sweeter mid range, but missing a bit of bass puch the chinese 88 can boast..
Superior highs will be awarded to the russian 6550.
As I say, I bought the used amp, in 2008, had Svetlanan NOS 6550's, sold those off for $400,,,not some 12 yrs later rebuying at $450,,Sellers page mentions these 6550's are identical to the older 6550's,
which i believe is the truth.
Cayin is a superior amp to Jadis.
