Rerurn to Romy the Cat's Site

I have to admit that since I went for DHT on MF channel I go get a number of positive moments in sound but I also lost some aspects of imaging. Do you remember I reported that using two different DHT tube on right and left channels I had strange imaging aberration. Well, I did address the problem by use the very same tubes for right and left channels but in truth the problem did not go away. The aberrations on the fringe of imaging zone (you see how much I do not what to use the word soundstage :-) have gone but the whole presentation pattern have changed and in some case it is not what I would like it to be.

It is very possible (and very likely) that the DHT amps themselves have absolutely nothing to do with it and the imaging alteration took place because my new MF channel are more “contrasty” and more “intense” then they use to be with single-stage 6E5P. To address it I need to move the speakers – something that I do not what to do until I move. Still, I wonder if it would be worth to me experiment with matching of my DHT tubes.

I do not mean matching them by currant, cathode emission or any other quantifiable characteristic but rather by exoteric deformation of imaging?  If the DHT themes are the problems (not the reason that I described in a former paragraph) then the imaging matching might justify itself. I never had this problem with nether 6E5P or 6C33C driving my MF channels. So, are any of you senior DHT guys come across to what I am describing? I did not hear DHT people ever talks about it but I do not hear audio people generally talk about specifics of imaging anyhow….

Rerurn to Romy the Cat's Site