SB12PACR25-4-COAX

[markbakk]

Yeah. The crossover fixed and the enclosure to be varied. Only likely when copper prices are skyrocketing and you build dummies out of cardboard…

 

[mikessi]

I saw that SB acoustic have just updated the paper on crossovers for the coaxial drivers, to include this one.
https://sbacoustics.com/technical-notes/

Interesting they're 3rd order electrical for both high & low pass. If it's at 2100-2200Hz as the PDF states, the tweeter rolloff starting at ~1.3 kHz would turn the high pass to acoustic >4th order from that point on.

Anyone try these filters with the SBA coaxes yet??

Qts -- Can you see whether the dome silk or poly?​

 

[Qts]

Looks like silk and same as in other coaxials. I think it is SB14ST-C000-4 / Fabric.

 

[mikessi]

Looks like silk and same as in other coaxials. I think it is SB14ST-C000-4 / Fabric.

Thanks for the info.

Did you do anything with your drivers yet?

 

[Patrick Bateman]

Strange measurement (phase and various smallband dips). What is your setup?

The phase looks weird because it's not unwrapped

 

[Qts]

Thanks for the info.

Did you do anything with your drivers yet?

Iam good to start projects but very bad to finish them. Answer is: just random tests.

 

[mikessi]

Iam good to start projects but very bad to finish them. Answer is: just random tests.

😆 Similar problems here, from time to time. But you did have an idea about how to use them...? My idea is to use one of these OB atop a bass bin. Add a tiny rear firing tweeter in parallel to the coax tweeter -- the SB14ST-C000-4 is an obvious choice. I've been doing nothing but active in the past few years. Would like to do a passive this time.