Make glass spherical speaker

I made a bass reflex type speaker using Mark Audio's 8 cm full range speaker unit OM - MF 5

Spheres are said to be the ideal shape as a speaker.
I used a cheap spherical glass (diverting a vase) and made a desktop type small speaker.

For acoustics calculation sound sound should come out without putting sound absorbing material ...
However, I do not know because there is no measuring equipment.
(As I place importance on design, I do not plan to put sound absorbing materials.)

Google Translation

Parts
・Speaker
https://amzn.to/2CxbbeB
・Spherical glass vase
https://amzn.to/2yxZmSo
・Banana plug
https://amzn.to/2CAG7KL
・Copper wire
https://amzn.to/2O5RbC0
・Quick Connect Terminal
https://amzn.to/2CYBcVf
・Bass reflex duct
https://amzn.to/2Cyo5Jf
・MDF board
https://amzn.to/2OHZNUz

Insulator
・M6 Cap nut
https://amzn.to/2NZKUYn
・Cork mat
https://amzn.to/2CzUtep


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