Tube rectification is more desirable in terms of sound quality and usually adds more cost to the tube preamp. Every tube preamp I have owned that was tube rectified was better sounding than one using solid state rectification, although there are a few exceptions.
Tube rectification
This may have been chewed on before but I'm at a loss here. I recently went back to tubes and acquired a SoundStage Two pre that uses two 6dj8/6922 tubes. By the way while doing some rolling I found the Mullards to sound the best thus far. Anyway I have seen other preamps having a tube for rectification(5y3 etc). My question is what does a pre with this tube do in reference to one like mine that does not have this feature. Am I missing something in terms of sonics. The SoundStage sounds really good and can be modded as mine has been. Thanks for any info and enjoy the music.