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Raptorman

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Raptorman last won the day on June 29 2013

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About Raptorman

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  • Birthday 02/09/1995

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  1. It's completely necessary. It's the most necessary thing to test IMO. Unless this isn't a mobile audio forum and our ears don't perceive pressure-levels and only perceive impedances lol.
  2. Now, post up in-car response graphs of each. That's what really matters
  3. After you test the 32hz rear port then bring it down to the mid to high 20's where people realistically tune rear ports for 6th's. Smaller rear port is better. Tested it in many different cases myself multiple times. Any data is good data though.
  4. Yeah that looks pretty good to me. But that would require doing what you've explained. Not a realistic option for someone in my sort of business. Would work awesome for someone trying to build their personal setup though.
  5. Now put it in the vehicle where it actually matters. Of course it will be accurate in an open environment.
  6. Yes it does. I have tons of notes as well testing 20-50 at the headrest with windows down for every change ive made to my 6th. I have yet to see Winisd model up an accurate graph for any enclosure that I have designed/built. (I've designed over 3,000 enclosures alone) Ported doesn't get as low as it says, it doesn't spike as hard as it says. It doesn't extend into the upper frequencies in a flat response as much as it says. It doesn't account for cabin gain, stiffness of panels within the vehicle, port areas, window configurations, box positions, etc. 4th bandpasses are especially hilarious because a 4th that plays 20-60 completely flat in the real world has a huge freaking spike at tuning with virtually no bandwidth. Those graphs crack me up lol
  7. This has been covered already. Post 'em up man. Would love to see the graph vs real world response!
  8. they can work for us. Just not the best option IMO. I hate having two exit ports, can cause some funky loading/cabin pressurization.
  9. For car audio, you will want to work with series. Parallel doesn't fit in very well for us IMO. And series is much easier to get right.
  10. It's right. And pay ZERO attention to the graphs in winisd or any other program. They are utterly useless. All you should use winisd for is vent mach and tuning.
  11. Throw "ratio" out the window. (for the most part) Go for the ratio that gives you the proper port tunings, port areas, port lengths, and chamber volumes. Rear tuned low, small port area, smaller volume. Front tuned high, tuned double the rear tuning, large port area, bigger volume. I say for the most part because I've found that anything below 1.5:1 is in most cases not an optimal enclosure, and the box starts to get very cramped and it gets tough to lay everything out efficiently.
  12. Contralto subs love 4th bandpasses. If people didn't adhere so strictly to numbers and programs they would realize this. Assuming at least RMS power clamped: Sealed: 2.2 Ft^3 Ported: 6.0 Ft^3 - 10.0 Ft^3 Port Area: 90.0 In^2 Port Tune: 42.25 Hz
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