longdrive03 Posted February 8, 2013 Share Posted February 8, 2013 I bought this woofer off ebay as a direct replacement for the RT-12 woofers. It looks like the RT-12 and is very massive and impressive. When I tested the woofer on Woofer Tester 2 version 7 the Fs was 39 Hz which seems extremely high. I ran a breakin using a 30hz tone for a full day and Fs didn't change. I've attached some pics. I had a RSW-12 sub that I pulled the woofer on and tested and it was 24Hz Fs. It doesn' thave the "tall boy" surround the RT-12 has. This throws off my sub project. Also, it has a 5.5ohm impedance - not the 4 ohm impedance I was expecting. Anyone help appreciated. Thanks. Quote Link to comment Share on other sites More sharing options...
Jay L Posted February 13, 2013 Share Posted February 13, 2013 The Fs sounds about right to me. Fear not, as long as that is a "real" woofer, it will perform as expected. The Re sounds correct as well. That is a 6 ohm woofer. Quote Link to comment Share on other sites More sharing options...
longdrive03 Posted February 17, 2013 Author Share Posted February 17, 2013 Jay, thanks for the response. The Fs surprised me since the Fs on the K-1113-T woofer I bough was 24.5Hz. I'm building a larger RT-12 cabinet (37" tall) with two 12" passive radiators (blown out K-111-T woofers) with 450 grams on each. Right now I plan on using the Dayton Ultimax 12 which has a 26Fs. Here's what the cabinet will look like. Quote Link to comment Share on other sites More sharing options...
Fizzlemizzle Posted February 18, 2013 Share Posted February 18, 2013 That driver is actually pretty impressive looking. It looks like the Xmax should be pretty high, did you do any free-air testing to get a rough estimate of what it can do? It looks like 20mm shouldn't be a problem for it. I'm surprised the FS is that high - the surround looks pretty stiff and I would have expected it in the mid to low 20s. Nice project there, that bracing in the center is pretty serious. I like to model subwoofers for fun, would you mind PMing me the T/S parameters? Quote Link to comment Share on other sites More sharing options...
TasDom Posted February 18, 2013 Share Posted February 18, 2013 Here's what the cabinet will look like. That cabinet looks gorgeous! Good luck on the project and please post some pics when completed. Quote Link to comment Share on other sites More sharing options...
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