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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 1 response by upscaleaudio

upscaleaudio's avatar
upscaleaudio
259 posts
 
Hi there..

In the Pre-2L and Pre-2LSE both pairs of tubes are voltage gain. One may be more pleasing to upgrade than the other for you. There are no rules to that. Try it for yourself.

In the Line 1 and Line 2 we seemed to get the best results by changing just the rear pair. This in an effort to get the most bang for the buck and not do all six tubes.

The good news is that both preamps are such that you can mix and match. Just make sure that each pair are the same. So you can put Russian 6922 in one position and 7308, 6922, 6DJ8, CCa, etc in another.

Regards,

Kevin Deal
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