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Best sounding tube for Audible Illusions M3A preamp?

I am interest in learning what folks are using as the best tube for preamps, specifically, the Audible Illusions Modulus 3A. (My AI M3A also has a Gold phono stage card, but that is purely solid state). I have reviewed nearly all the tube roller-specific forum threads here, which are spread over  several topic areas. I have also reviewed another thread located elsewhere (https://www.head-fi.org/threads/6922-tube-review-17-top-6922-6n23p-e88cc-cca-7308-e188cc-tubes.76107...). I know that AI recommends the 6H23n tube for the M3A. So please let me know your thoughts about this tube and whether you can recommend a particular brand of the tube and commercial online supplier. I would also appreciate your view of alternative tubes (including brands and online suppliers), should you recommend something other than a 6H23n tube for the AI M3A.
128x128celander
stereo5's avatar
stereo5
6,381 posts
 
6H23NEB tube.  Any others will last 6 months or so.  Trust me I learned from experience.  I had an original Modulus 3, 3A and 3B.
celander's avatar
celander OP
1,503 posts
 
Thanks, my friend. 
azazello
63 posts
 
ECC88, PCC88 - Tesla, Siemens, that sound better. I use it in my DIY projects with SEs 300B, 2A3 Loftin White, 6P31S, 6P13S, 4P1L EL84, EL83, EL11....
oddiofyl's avatar
oddiofyl
3,802 posts
 
6h23eb is super rugged....   have had one in my c-j which can be tough on 6922 type.   The new Gold Lion 6922 is durable too , have one in my Classic 2 SE and it's at least 2 years old and still sounds great and zero noise.   
cides_xalapa's avatar
cides_xalapa
2 posts
 
You have not choice than 6H23EB.  Sounds beautiful with M3A and last much more than other brands. I have tested many and use Reflektor for many years now.  Look them in www.thetubestore.com and buy in matched quartets.
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