Invidiosulus Posted October 2, 2009 Share Posted October 2, 2009 Hi all,I've been debating what to make with a pair of Klipsch K-33 woofers I have.The specs as provided by eminence are,SPEC 15162PART # K-33RE OHMS 3.39 FS HZ 34.46LE MH .96 MMS GMS 78.59QM 7.39 CMS mm/N .2714QE .410 RMS NS/M 2.3037QT .390 VAS LTRS 301.66XMAX MM 8.20 SD SCM 889.59BL TM 11.88 EBP 84.4EFF % 2.91 SPL dB 96.6Wattage 150rmsI'm trying to figure out if these would work well in an Onken style enclosure.I've typed the specs into the onken spreadsheet I found on the internetand things such as vent length seem to stay within spec for the onkenideal.My other option for these woofers is the MWM folded horn.But I'm really curious about the onken.Any thoughts and ideas?Thanks,Josh Quote Link to comment Share on other sites More sharing options...
dkalsi Posted October 4, 2009 Share Posted October 4, 2009 If someone has done this, please chime in.... I am interested in this as well. Quote Link to comment Share on other sites More sharing options...
Marvel Posted October 4, 2009 Share Posted October 4, 2009 awsjr from Texas has some Onken cabs. At least they look like them Quote Link to comment Share on other sites More sharing options...
djk Posted October 4, 2009 Share Posted October 4, 2009 The Jensen Ultraflex (Onken) porting method should work fine for just about any driver that requires a port. Fraizer also used a similar such port on several systems. Quote Link to comment Share on other sites More sharing options...
Invidiosulus Posted October 4, 2009 Author Share Posted October 4, 2009 I'll try and draw up some plans based on the measurement's from the spreadsheet and post em up here to see if they seem about right. Thanks, Josh Quote Link to comment Share on other sites More sharing options...
Invidiosulus Posted October 4, 2009 Author Share Posted October 4, 2009 According to the onken calculator, Port area is supposed to be between 85% and 100% of SD of the driver. If I do that in the calculator it makes the port length too long to be "true" to the "onken" style. Are there any real problems with using a smaller port area with shorter ports? WinISD plots it as being ok with about a 13.5 cubic foot enclosure. I really have no idea what I'm doing. -Josh Quote Link to comment Share on other sites More sharing options...
djk Posted October 5, 2009 Share Posted October 5, 2009 You can bend the ports as well. There is a Dynaudio design where the port goes clear to the back, makes a 180° turn and goes forward. The idea behind the Jensen Ultraflex style port is two-fold: large area to reduce mach speed in port, bracing the outer walls of the box. 50% of SD is generally sufficient for the first, 2/3rds the depth of the box for the second. Quote Link to comment Share on other sites More sharing options...
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