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https://www.decware.com/cgi-bin/yabb22/YaBB.pl SUPPORT FORUMS FOR DECWARE SPEAKER PLANS >> Housewrecker Support Forum >> Port scaling https://www.decware.com/cgi-bin/yabb22/YaBB.pl?num=1311893406 Message started by glenneaux on 07/28/11 at 23:50:05 |
Title: Port scaling Post by glenneaux on 07/28/11 at 23:50:05 Hi everyone I've just built my first HWK12 (cnc routed the panels at least...) which will house 2 Alpine Type-X 12's, so should be fun. One last problem i've got is the port. Obviously the HWK15 is designed for a 6" port, 8" long. When scaling we end up with a 4.8" dia port, which obviously doesnt exist... I had the choice to roll some aluminium and create the correct port, but would prefer to use the 6" pipe, and i have read that it is possible to alter the length of a 6" pipe to create the "4.8" port... How do we go about calculating the length ??? Port size calculators ask for volumes and tuning frequencies, but i'm guessing the HWK isnt a simple affair in that respect.... So what do us "Scalers" do? |
Title: Re: Port scaling Post by HT-EXT on 08/08/11 at 14:28:41 I sent you a PM with the port dims that are recommended for different size HWKs. Let me know if you need more info. HT-EXT |
Title: Re: Port scaling Post by glenneaux on 08/16/11 at 00:34:44 Hi There, Thanks very much for your response, however, it seems to have gotten cut off ? The HWK12 info is missing! So far the box is built but currently just standing around with 2x alpine dd-drive 12's in it with question marks about the ports! I'm thinking to fit it in my car (even temporarily) i'm going to have to cut a new front panel and put the "top" port in it because its too wide to fit in the backseat of my car! (mk4 supra) |
Title: Re: Port scaling Post by HT-EXT on 08/16/11 at 16:47:46 So the PM I sent did not have all the info you needed ??? HT-EXT |
Title: Re: Port scaling Post by glenneaux on 08/17/11 at 00:19:37 HT-EXT: Thanks mate, Yeah the first PM must have been cut off. 2nd PM seems complete and definately gives me something to work with! Just another query, can I put the top port in the front (with the other 2 ports) so as it fits in my car? Cheers, Glenn |
Title: Re: Port scaling Post by HT-EXT on 08/18/11 at 19:31:36 I think you can get away with that. There are some old post on this matter and I am pretty sure someone has already tried it. Let me know how it turns out. HT-EXT |
Title: Re: Port scaling Post by HT-EXT on 08/18/11 at 19:32:00 I think you can get away with that. There are some old post on this matter and I am pretty sure someone has already tried it. Let me know how it turns out. HT-EXT |
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