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Showing results for tags 'cabinet volume'.
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Hope you experts can give me some guidance as I am completely lost Trying to build a new cabinet for a 12" woofer (and a 14x8" horn). All info I have seen is very conflicting; showing volume sizes differing by up to 300% Background ... did not like my (small) Klisch KV2 center speaker (with KPT-904 mains), so was looking for another solution. Found a Yamaha stage monitor speaker (S112IV; 12" woofer and 14x8 horn w/ 2" diaphragm, pic at end of post), and was very pleased with the sound. FYI, forum veteran @Thaddeus Smith tried it with a similar (15") Yammie and I'm pretty sure he is impressed also. But; it is a stage monitor, meaning "rat fur" cloth covering which yields a 0/10 on the WAF meter. So; why not put the components in another (wife friendly) walnut box - haha with a Klipsch logo? (And, to keep the size small, I thought a sealed box would be OK as it is a center speaker and doesn't need low bass.) After days and days, I finally got the T/S specs from Eminence (mfg of the woofer; Yamaha model JAY51200). They are: 05-RE OHMS 5.66 13-FS HZ 47.72 06-LE MH .93 14-MMS GMS 34.80 07-QM 3.10 15-CMS mm/N .3195 08-QE .480 16-RMS NS/M 3.3707 09-QT .420 17-VAS LTRS 127.19 10-XMAX MM 3.00 18-SD SCM 532.36 11-BL TM 11.05 19-EBP 98.6 12-EFF % 2.75 20-SPL dB 96.4 So; plugged these into a couple of online cabinet size calculators and got 3-4 cuft as recommended for a SEALED box (over 7 cuft for ported). First comment; does not make much sense as the original Yammie box is ported and ONLY has an internal volume of about 2.0 cuft. (I "***-umed" that I could build a sealed box even smaller than that.) Anyone ???? Next it gets even more confusing. Eminence told me a "cheaper' replacement for this driver is their model "Beta-12A-2." Eminence shows a ported box volume for this at 4.75 cuft and a sealed box (with heavy polyfill) at 0.9 cuft. ????? 1/5th the size ???? Parts-Express recommends 2.36 cuft sealed and 7.35 cuft ported. PE's 2.36 vs Eminence 0.9 cuft just because of some polyfill ?????? Obviously these numbers are "all over the place" and I have NO CLUE why Furthermore, don't want to spend $200 (baltic birch and veneer) plus weeks building a box which is completely wrong My only "uneducated" solution is to "copy" the Yamaha design ... or throw it away as my wife will not allow a "rat fur" box Many, many thanks for any inputs/thoughts Cheers, Emile