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I've made a jig that allows me to change out ports on the fly so to speak. My first model used a several 6” diameter port's and they all had port noise ranging from severe to medium, the longer the port the less severe the port noise. Then I tried an 8” diameter port and to my surprise, I still...

Kyle, do you know the volume displacement of the Maelstrom so I can figure this into the net volume, I’d like to get as close as possible to the actual length of the port. Additionally Does Win ISD account for the volume of the port, if not the modeling idea is a complete waste, as the net...

OK, I've tried the tuning by watching the cone movement thing and it seems to be more difficult than I first thought. I can’t tell the difference in cone movement between a 6" X 10.72" port (20Hz) and a 6" X 30" port, so how could I possibly fine tune a inch or so? I was using a 20 Hz Test...

One of my test CD's has several Test Tones (Alan Parsons & Stephen Courts Test CD) that run together each on a separate track, when it's played it sounds like a Sweep tone that has short breaks in-between when it changes to the next track, so this was what I am planning to use. I'm still not...

Thanks Kyle, Anthony and Jack, that’s the kind of info I'm looking for. I never liked or trusted modeling programs completely and have found that real listening experiments always work best and give me more confidence. Now let me see if I got this right, if I want to tune the box to 20Hz then...

Thanks Guy’s for the comments and I must say that I’ve had the same problems with any of the modeling software I’ve used, no two programs will give you the same results. That being said I’m back to square one. What length and port configuration should I use? Or should I just do as Kyle did...

Yes I do understand that, and I have the latest version of WinISD Pro, it's just that I'm a bit new to it as I normally use Speaker Workshop. The reason I asked if there was a problem with a single 8" port as opposed to 2-4" ports is that I've read that to large a port will cause the air...

My best modeling using the On-Line Parameters shows that a 340Liter box tuned to 20 Hz with 2-4” or one 8” port works best. I have noticed that the response seems to be smoother as the enclosure gets larger up to about 340 Liters then a Peak starts to rise, so based on this I plan using this...