So this is the issue with WinISD. If you let it calculate as many parameters as possible by itself, it works for those parameters. Issue is, those parameters don't match the manufacturers. If you enter the manufacturers parameters, it kicks them back and if you model it anyway the returns are off. So which do you trust, the the software or the manufacturer?
Try to model the CT Sounds Tropo 10 and you'll see what I mean. Try the DC Audio Level 3 10 as well.
It's an awesome software no doubt. Those are the two that I tried once I downloaded it and ran into what I'm describing above. Speakerbox, subbox.pro, and ultimate car audio app all matched using the manufacturers TS parameters.
Now I'm legit curious as to what's the difference in WinISD. I deleted all of the info for CT Sounds and started over from scratch and got the same results. When you run across this what do you do?