I have a pair of Chorus II powered by 2A3 set monoblocks. Fun with tubes and horns. Plenty loud with 3 watts. I have drooled over those wooden horn systems for years. Good luck with your project, and please post pictures.
https://sites.google.com/site/diyfir...-midbass-horns
Also volvotreter.de
inlowsound.weebly.com
Pispeakers.com
Last edited by Don Bunce; 04-07-2019 at 4:18 AM.
Here you go.
https://www.blocklayer.com/pyramid-calculator.aspx
Birdsmouth joinery. There's some good videos on the bit to use and how to do it.