Ultra bass plans and photos (BD-Design)

by RLRB, Monday, June 29, 2020, 18:38 (1391 days ago)

Hello,
i have Oris 150 with Aer bd3 and i wwant to make these bass units.
Anybody has plans and photos to see inside how is made?

Maybe this Works better tan 4 bd15 ripoles?

thanks