I recently built these resonant style cabinets for a Wild Burro Audio Labs "Betsy" full range driver. They are similar to the Auditorium 23 Rondo, Saba Cello and Saba Reso speakers. I used maple ply and finished them with a 100% natural oil varnish.
I'm happy to answer any questions you may have if you are interested in a pair. Just send me an e-mail!