Hi T bone:
It looks like really an older version, as I say before Mr. Imai is no longer making amp with 2A3 tube, now only 300B or 6AS7G. In Mr. Imai's own view 6AS7G is more quieter than 300B therefore currently the top of the line such as TM-9502 are in 6AS7G tube. I can ask Mr. Imai about your TM-8401 and let you know once I have it. Most Audio Tekne's power amplifier come with only 8 or 15 watt and I may believe your TM-8401 probably only have about 8 watt may be. So you need a speaker with at least 94db. If you need to see more Audio Tekne's info in English you may go to my web-site www.tangramaudio.com
Thanks
It looks like really an older version, as I say before Mr. Imai is no longer making amp with 2A3 tube, now only 300B or 6AS7G. In Mr. Imai's own view 6AS7G is more quieter than 300B therefore currently the top of the line such as TM-9502 are in 6AS7G tube. I can ask Mr. Imai about your TM-8401 and let you know once I have it. Most Audio Tekne's power amplifier come with only 8 or 15 watt and I may believe your TM-8401 probably only have about 8 watt may be. So you need a speaker with at least 94db. If you need to see more Audio Tekne's info in English you may go to my web-site www.tangramaudio.com
Thanks