Interesting concept: I see some six closed compartments !
I of course expect these are guides to help construct and glue.
My lost sound: the FE103Sigma in my TQWT, therefor am looking at better builds (the TQWT had its organ-pipe resonances, even where they were not sharp. Or else the ESL57. My Lowther in OB was great sounding but was big and always needed a loud level. Looking back the small Fostexes were very much my liking.
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