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  1. DIY Speakers
    I.S.C.T – ‘Black Widow Maker’ High Velocity, Split & Heavily Shaped - Interactive (SEALED/VENTED) Sub Enclosure …. In my ongoing quest to find somehow something else maybe more or even different in improved sound reproduction in build or in more advantage shaped cabinets for 10”, 8”or 6.5”...
  2. Ported Subwoofer Build Projects
    i know a lot of research has been done on this matter already...and i feel like i have read almost too much of it...i have also used the flare-it program...but i still have a question... for my current design... given the max input signal is 300W which equates to an output of 109dB the port...
  3. Ported Subwoofer Build Projects
    I'm somewhat new to ported subs, but I understand the basics. However, what is the absolute maximum port air velocity that can be used without tons of port noise? I am designing two subs, one extends much lower than the other but has much higher port velocity (65m/s). The other doesn't extend as...
  4. DIY Subwoofers - General Discussion
    Trying to find adequate PORT for this Enclosure :RSS 315 HO-44 in 3.5 cuft net with 500w tuned to 20hz .
  5. DIY Subwoofers - General Discussion
    I haven't read any of Collo's documentation... but can we get a few facts? Actually a chart would be nice. What I am really after I don't expect anyone to know for sure...as you know I'll be doing a giant ported design with somewhere between a 14" to an 18" port for a single 21"+ sub. I have...
  6. DIY Subwoofers - General Discussion
    Hi all, I am curious as to what effets high and low port velocities have on a subwoofer build, why there are specific targets and what these optimum targets and benefits are? It seems when I model simple sub builds the port length seems very long? The wider the port the longer, the more ports...
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