I designed a speaker case for a 9x16mm speaker, which fits in the rear of the E8 unit. It goes over the gear and shaft extension at the back end. No machining required. It has a lot of volume which helps with the loudness and maybe adds a bit of bass... (I did not check with my spectrum analyzer). Anyway, the file is in .stl format, on TinkerCad (AutoCad). I made it available to anyone that is interested.
https://www.tinkercad.com/things/6cRVAyHspIf-speaker-cabinet-for-concor-e8-n-scalePlease do not use this commercially (violates the TinkerCad policies).
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