They look great! I have recently browsed the Supravox catalogue - member Airbearing also uses a Supravox fieldcoil unit in his speakers, it could be a promising bet - but could not find anything over 99 dB/W. even field coil. How do you match the bass drive to the medium?My humble setup:
Kondo Japan Souga + M77 (thank you, @Rhapsody!) that plays through these custom horns:
They are built around the 1940s (yes, 1940s) RCA 1443 high voltage field coil midrange. Frequency response: 300 - 7500 Hz, and > 110dB efficient.
Fostex TA500MkII horn super tweeters and Supravox 12" field coil drivers in a LaScala style folded horn walnut enclosure round out the setup.
Low end comes from a 500W transmission line sub.
This is more than enough for my small room.
The (ugly!) solid state power supply you see behind the speaker is being replaced by the mercury vapour power supply you see below (unfortunately, the first version caught fire!).
As much as I love these, it's been more than 5 years since I designed and commissioned them. For my next room, I will just order from @Rhapsody. Bob has done all of the hard work, and delivery won't take 5+ years .
View attachment 77611