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My Jadis Int amp. distorts in the upper mid-range


Hi All
Just bought a Jadis Orchestra Refference Integrated amp. (used) - and it's distorting in the upper mid-range levels..

It uses 4x KT-90, and 2x ECC83 imput tubes, with about 400 hours on them - and were the ones originally supplied new from Jadis.

I have 100% elliminated my other components as a posible sourse of the distortion..

Please help !!

Also: If I have to change my tubes, does anyone have first hand experience at what tube upgrade is PERFECT for the Jadis Orchestra Reference Int. amp.

Thanks
saffy

Showing 2 responses by newbee

newbee
4,795 posts
 
Is this distortion at all levels? Could it be that you're just driving you amp into clipping? Does it appear in both chanels? You might have a mismatch with your speakers.....
newbee
4,795 posts
 
Saffy, i assume that the distortion is in both channels. If not, you could try swapping tubes around using a process of elimination til you find the bad tube. But if its in both channels i doubt that it would be one tube, either power or driver. Whats left to consider is the type of tube being used. Detlof has suggested something along this line and his recommended Yugo EI12ax7A elites have a very smooth clean mids and highs (i use these and highly recommend them). But, since i don't know what this intergrated amp replaced you may have just substituted in a product which is allowing you to hear your stream equipment and the fault may be there. By the way how did you reach the conclusion it wasn't your other equipment? A lot of folks discover distortions and frequency tilts when they plug in a higher resolution amp/preamp only to discover the source is a cd player or some such.
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