Hi Alex,
This section of the Decware forum is for information and help with the open baffle speakers I build using the WBAL Betsy and Lii Audio F-15 and Fast-8 drivers.
The Fast-10 drivers aren't used in any of my offerings, so I won't be much help with your question.
If you post your question in the "General Discussion and Support Forum", someone might be able to provide an answer.
However, I have heard a pair of the Fast-8 drivers in my baffles paired with a Decware Rachael amplifier and it sounded incredible .....
Best wishes,
Randy in Caintuck