First OB build

[Fredzz0rs]

Hi! I would like to try build a cheap OB-speaker with design influence from PAP.
i want it to have high efficiency because I will use my tube-amp. I want to go all passive. Understand that I probably will have to get a active subwoofer to get enough low-bass but what's your opinion about this sketch?

Best regard, Fredrik

 

[Fredzz0rs]

I have also thought about use the Beta 15a instead of Alpha but it has lower QTS but mabye can work anyway?

 

[frangus]

Looks fine to me. The beta15 sounds much better than the alpha 15

 

[Fredzz0rs]

Looks fine to me. The beta15 sounds much better than the alpha 15

What do you think about the SPL-level between the Fane and the single
Beta/Alpha 15A? They have almost the same sensitivity but I guess the 15A Will
loose more SPL with given watts than the Fane because of the lower frequency range it work in. I’m quite noob on this things.

Read somewere that ideal is to have a bass driver that has like 6-10 db higher efficency than the Fullrange Driver.

In that case, maybe I Will need to have Two Beta 15A in parallel to compensate?