12" driver

Jan 19, 2011
941
42
28
40
Oslo, Norway, Norway
drbentsen.no
I have a pair of old DAS R-212 in inventory. The cabinets are good (as in looks decent and solid) but the drivers are shot to pieces. I've been thinking about retrofitting them with new 12" drivers as a project.

They are roughly 106L internally and port frequency is around 58hz.

WinISD gives me 3 options for drivers:
RCF MB12N251 has the flattest response, but I believe this driver is EOL.
Beyma 12G40 looks good.
B&C 12PLB100 looks goods, with a slight bump around port freq.

I can get hold of all these three manufacturers pretty easy and have simulated nearly all their 12" in inventory that's labelled woofer/mid-bass.
Skipped their pure subwoofer drivers.

Any input on 12G40 VS 12PLB100?
Anything else I should look at?
 

Uwe Riemer

Freshman
Mar 3, 2011
116
3
18
Germany
I found some pictures of the speaker in question on the net. MTM configuration, small ports, which rules out the high Xmax drivers, but will help quality of midrange.
"They are roughly 106L internally and port frequency is around 58hz"
Did you substract Volume displaced by drivers, horn and ports already?

You seem to focus on ferrit drivers, why?
12PLB100 to me looks more like a low driver, not midrange, X var ( Klippel ) is considerably smaller than X max ( calculated ).

12ND830 should work in the enclosure you described above
 
Jan 19, 2011
941
42
28
40
Oslo, Norway, Norway
drbentsen.no
I found some pictures of the speaker in question on the net. MTM configuration, small ports, which rules out the high Xmax drivers, but will help quality of midrange.
"They are roughly 106L internally and port frequency is around 58hz"
Did you substract Volume displaced by drivers, horn and ports already?
Yes, that's why it says roughly.

You seem to focus on ferrit drivers, why?
It|s accidential, they gave the best transfer function in WinISD. I simulated a lot of Neo drivers as well.

12PLB100 to me looks more like a low driver, not midrange, X var ( Klippel ) is considerably smaller than X max ( calculated ).

12ND830 should work in the enclosure you described above
Thanks, I'll do a sim of your suggestion.