Goblenator Posted January 4, 2014 Author Report Share Posted January 4, 2014 why in the hell would i pay $5k for a software program? Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted January 4, 2014 Report Share Posted January 4, 2014 i'm not talking about cubic feet and port tuning i'm talking about frequency response based off of the TS parameters of the subwoofer according to the enclosure it's in. Torres can't do that. In that case take a look at Hornresp http://www.hornresp.net/ Its not the easiest thing to learn how to use, but its very powerful. This will help: http://www.hometheatershack.com/forums/diy-subwoofers-general-discussion/36532-hornresp-dum-hmm-everyone.html "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds: Link to comment Share on other sites More sharing options...
Goblenator Posted January 4, 2014 Author Report Share Posted January 4, 2014 Wouldent you just tune them the same as a regular box? For 4th order you i would asume you just use the cubic feet of the ported section and plug that info in to torres and calculate tuning likr that. Kinda the same for a 6th just do one at a time. Yeah they are tuned using the same method as a regular ported box. If you are looking at a more accurate way to do you tuning the best way I have found is using a spreadsheet and the formula and just do it yourself. You can get the formula here: http://www.diysubwoofers.org/misc/portcal.htm The advantage of doing it yourself is you have more control over the end correction. With WinISD you can pick between three different end correction values, but none of those apply to slot ports. Torres doesn't even give you an option for end correction. It may not sound like a big deal, but if your end correction is wrong your tuning can be off by several Hz. I know if you build a slot port using the standard .732 end correction in WinISD your actually tuning will be 2-4 Hz lower than what you intended. Here is the end correction values I use. Two flanged ends 0.850 One flanged end 0.732 Two free ends 0.614 Slot w/ 1 common wall 1.230 Slot w/ 2 common walls 1.728 Slot w/ 3 common walls 2.227 Almost all slot ported boxes are ones with 3 common walls so 2.227 is the end correction you want. I've used impedance sweeps to verify the tuning on boxes I've built and that's what gets me the closest to what I want. If you want to learn more about tuning and end correction you can read about it here: http://www.troelsgravesen.dk/vent_tuning.htm See this is what i'm talking about. is there a more accurate program to calculate this stuff. I suck at math! Link to comment Share on other sites More sharing options...
Goblenator Posted January 4, 2014 Author Report Share Posted January 4, 2014 that horn program is way beyond me Link to comment Share on other sites More sharing options...
Joe X Posted January 4, 2014 Report Share Posted January 4, 2014 why in the hell would i pay $5k for a software program? It's not just software it's calibrated microphones an RTA and a bunch of other hardware tools. It's professional development stuff. BTW there's way more expensive than this. Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted January 4, 2014 Report Share Posted January 4, 2014 that horn program is way beyond me Its not as tough as it looks, I promise you will learn a whole lot about speaker design theory by learning how to use it. I think you will find the effort worth your time. If you want I can give you a copy of my spreadsheet I use for port calculations, its pretty easy to figure out. "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds: Link to comment Share on other sites More sharing options...
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