Can you identify this woofer

[fin1bxn]

My father had these mission drivers in his basement, they are about 20years old. 8" woofer (NOS) he was the NY area mission rep in the 80's. They had no markings on them and we think they might have been replacement for the 770f's or 780's.

I built a 1 litre 3/4"MDF with 2" port- put in a Boston a 40 x-over, I think its a 6db 2nd order crossed over at 2500.

I know these things can take power. I had them hooked up to my high current 180 watt mono amps and man they cook. Great imaging up front vocals, Tight bass. Fill my room with sound (27x13) I added my sub and its a very impressive sound.

The problems, no low bass, too bright.

Hooked up to my el84 amp in a small room they sound like studio monitors

I think they are realy good componets and want to build a new cabinet (or veneer my cab)and crossover, but without knowing the woofer specs I'm lost and need help. I think the tweeter is a Vifa d25.

Thanks for any help or sugestions

Bob

 

[richie00boy]

Measure the Thiele-Small parameters. A guide is on my website and there are other sites telling you how.

 

[fin1bxn]

Found out what speaker they came from

After searching, they are the woofers for Mission 763's. The cabinets are 35 litre 32x10x11. With a 3K x-over point...

I'm going to built a cabinet to those dimentions. Any sudgestions what crossover I should build 2nd, or 3rd order? 6,12,18db.
I'll be using the Mission labled (vifa d25 i think) tweeter.

Thanks
bob

PS I looked at your site and downloaded your information - Thanks.

 

[Inductor]

fin1bxn do you mean a Vifa DX25 or D25AG (or other)?

 

[Jonasz]

The midbass is definately a Seas polypropcone.