![]() Don't forget that WinISD v0.7.0.809 is BETA software, & although it works just fine, as yet the intra-chamber Port is only Auto scaled for a 2 - 1 ratio. Keeping the ratios 2 - 1 enables you to also keep the ports equal in size. But, they don't have to be that ratio, they can be whatever suits your purpose. The designs that show one chamber twice the volume of the other chamber, are correct. What you need to remember is, there is more than one fixed way to do things. What happens to the first tuning frequency when it plays 26 hertz? because the volume of the enclosure would now be a full third larger, changing the tuning frequency.Ĭan someone please help me with my dilemna? If i tune the second chamber an octave above, like it theoretically would be in the first example, and I make the intrachamber port the same length as well. ![]() If i tune the second chamber to 26 hertz, then the port sizes are not the same. My thinking is that the website says i'm supposed to tune "the entire enclosure" to 26 herz,Īnd Win ISD says i'm supposed to tune "just the first chamber" to 26 hertz. In the first, the two outer ports will resonate together in the entire volume of the enclosure to produce a tuning of say 26 hertz. ![]() These options change the entire function of the enclosure. In the second example, the second tuning frequency can be changed. The first chamber and it's tuning frequency only correspond to the first chamber's volume (not the entire enclosure as a whole). It doesn't and cannot include the second chamber's volume in the first tuning frequency. It designs the enclosure so that the first chamber's tuning frequency is only relative the first chamber's volume. Winisd's design of the ABC enclosure is different. The Subwoofer DIY Page - Dual-chamber ported systems This volume is then divided into 2/3 and each chamber is ported with the same size port as the first. ![]() It dictates that the entire enclosure is the volume of which the first port should be tuned to. This website is generally accepted as the go to for designing these enclosures. I found the winisd version you were talking about, and I've been testing different enclosures. ![]()
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