Canadian Audio / Video

[Vintage]

Well I bought a sleve of the JJ tubes from www.thetubestore.com, they came to about 100$ and had one of the tubes triodes matched and balanced. I put these into my counterpoint gear (SA-12 and SA-1000) on the advise from a very trusted repair tech. Along with the complete electrolitic cap swap in my counterpoint SA-1000 these tubes made a huge difference. I did not realize what I was missing, my Bose 601 series one speakers have real bass now. I could not hear the bass guitar so well before and I was starting to blame the preamp design for this.

The SA-1000 is very well known for being very microphonic mainly due to the rigid chassis and large cast standoff's the board is mounted too. The chassis is so poorly isolated in any way that severe vibration can be caused simply from the music comming out of the speakers, nevermind when you move a switch or select a input. These JJ tubes have 0 microphonics as far as I can tell, I did not do a direct tap test but I did switch all of the controls and no loud bangs were audible. I also taped the chassis in several places and could hear no trace of microphonic feedback. I tried several 6922's I had in stock that are known good tubes and all were microphonic.

I will be looking more close at new production tubes in the future, this JJ 6922 has changed my mind. People looking for a nice quiet 6922 should consider these tubes, they are cheap and sound great. The build quality also looks very nice, not cheap like so many other new production tubes.
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