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Conrad Johnson PV10AL Tube & Polarity Questions?

I don't have the owners manual for mine but I thought I read somewhere that the CJ's invert polarity? Is this true because it sure sounds that way in my system. I also would like to experiment with changing some tubes around. I listen to Rock & Roll. I have a pair of Tylo Monitors, Mc Cormack DNA-1, Philips 963SA with DH labs cable. I have never swapped tubes & have no idea what should be in there or is what in there at the moment. Where do I begin?
fishwater
pepler
30 posts
 
I did look in my pv10al box and low and behold there was the polarity warning, and shersta you are right it is red!
jkf011b6c9
1 posts
 
Argh! So do I invery polarity or not? At the speakers or the amp?
thanks
John
m_habib_20036734
7 posts
 
ALL cj pre amps invert polarity. It's a given.
jeffreybehr's avatar
jeffreybehr
805 posts
 
"ALL cj pre amps invert polarity. It's a given."

Wow--THAT's such a misstatement I'd considered it a lie.

Not all c-j preamps invert signal polarity. Those that have an odd number of gain stages do indeed invert polarity, as do all preamps (or poweramps, for that matter) of any brand that have an odd number of gain stages*.

John, generally, the easiest way to invert the signal polarity of your system is to reverse the speaker positive and negative leads at EITHER the amp(s) or the speakers but not at both locations.

*--a cathode follower is not a gain stage and does NOT invert signal polarity.
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m_habib_20036734
7 posts
 
While I am impressed with your knowledge, I insist ALL (atleast the dozen or so models I've USED) cj pre amps invert polarity. I HAVE OWNED THE PV-10 and assure / confirm / can bet it inverts!!
I agree the best way is to swap speaker cables. However, in a digital-only system, you can simply invert polarity at the CD player / DAC stage - if so equipped.
Enjoy !
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