Best tubes for modulus 3A

I would give Kevin Deal a call at Upscale Audio a call. I have been dealing with him for a while and find him to be a great help when picking NOS tubes. I put some NOS Tunsgrams in my M3A, and they sound great. Best-Gary

I'm very pleased with 60's vintage Siemens in my M3 I also know someone who swears by the Mullard gold pins. IMHO the Siemens offer better detail and a more neutral character, but tubes are very subjective (what isn't?) and strictly a matter of taste. Good luck.

P.S. The Siemens are 6DJ8's.

I have used both Ediswan and Tungsrams from Kevin Deal at Upscale Audio. Both have been very good. I highly recommend the Tungsrams, as they hold up better in the long run in the AI.