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Anthem Pre 2L tube rolling question

The Anthem Pre 2L uses four matched 6922s. I've swapped in plenty of varieties, and now have found some that sound really good (Valvos) but were pretty expensive. I've been swapping whole quads in and out.

Is it ok to use one pair of "good tubes" and one pair of stock tubes (or other ordinary tubes) in combination and still get positive effects? Of course, this way my quad of "good tubes" will last twice as long.

Just curious - of course I need to know if the good pairs should be on the front or the back.

Anybody with experience on the Pre1L or Pre2L can answer?
dozer

Showing 2 responses by paulwp

paulwp
585 posts
 
Yes, put the good ones in front. If there is a difference, this will be an improvement, although not as much as with preamps such as the AI M3a where 2 are for the linestage and 2 are for the phono. That's what SF used to recommend. I swap out all 4, but I dont get real exotic. Tube life in these preamps is pretty long, not at all like the AI preamps, so I don't worry about how long they last.

Paul
paulwp
585 posts
 
Hmm, that's a problem because I thought for sure Kevin told me the opposite, unless we arent talking about the same front. I could be mistaken, and as I said, I just swap all four. I'll see if I can raise him.
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