What tubes are you using?
How to deal with microphonic 300B tubes.
I have a used set of Cary CAD-300SE LX-20 mono amps, and I just love them with my Coincident Victory speakers. But I occaisionally get a weird, intense ringing microphonic from them, especially noticable when an FM announcer's voice hits just the right pitch.
I have them just sitting on my tiled floor, no attempts at vibration stands yet. I'm sure this could help a bit, but I am also thinking that tube dampening could be needed.
Any suggestions? Are there appropriate tube dampening strategies for 300B's?
Thanks,
Jay
I have them just sitting on my tiled floor, no attempts at vibration stands yet. I'm sure this could help a bit, but I am also thinking that tube dampening could be needed.
Any suggestions? Are there appropriate tube dampening strategies for 300B's?
Thanks,
Jay
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- 8 posts total
Herbie's Tube Dampers wouldbe the first thing I'd try. Call Herbie first to find out which one's would work best with the KR's. I think the KR internal(and external)structure is more heavy duty than TJ's, WB's, etc.so may need a special version. I tried a friends on a few of my tube amps recently and the improvement was easily noticable. Clarity, focus, and silence that I had no idea was missing. As a result, I've ordered a fullset for my ams and preamp. Do an archive search hear and on Audio Asylum's Tube forum for user opinions. Herbie's Audio Lab 6Moons review(1/2 down page) Positive Feedback review TNT Audio review(1/2 down page) Enjoy The Music review(1/2 down page) |
Jay, I had a similar problem with KR 300b XLS's in my Cary 805c's. You may want to try KR 842VHD's. I found the 842's to not have any problems with microphonics in my system. I think they will work with the LX-20 version of your amp, but make sure to check with Cary. Be aware, though, that the 842's will sound much different. I found them to be smoother and warmer sounding, but with some loss of bass impact and musical weight. Jeff |
- 8 posts total