Jeff Elliott
Stunt Coordinator
- Joined
- Nov 5, 2002
- Messages
- 59
Thanks to the wealth of knowledge contained in this forum, I have begun construction on my first sub; a ported AV-15! If you care to take a look at the progress, a few pics can be found here: link.
Now for the questions:
I've been using WinISD Pro for my calculations. However, I'm confused by the port information it's providing. I tell it I have a net 7 ft^3 box that I want to tune to 18hz. It tells me to use a 4.02 (ID?) port that's ~ 12" long. If I tell it to use a 5.5" port, it says the length needs to be 24" long! This seems a bit counterintuitive to me so...
1) What are your suggestions on port size? One or two 4" ports? How about a 6" port? I've got plenty of room so go crazy!
2) Am I reading WinISD incorrectly or is the data it's providing inaccurate?
Thanks for any help / wisdom you can provide!
Jeff
Now for the questions:
I've been using WinISD Pro for my calculations. However, I'm confused by the port information it's providing. I tell it I have a net 7 ft^3 box that I want to tune to 18hz. It tells me to use a 4.02 (ID?) port that's ~ 12" long. If I tell it to use a 5.5" port, it says the length needs to be 24" long! This seems a bit counterintuitive to me so...
1) What are your suggestions on port size? One or two 4" ports? How about a 6" port? I've got plenty of room so go crazy!
2) Am I reading WinISD incorrectly or is the data it's providing inaccurate?
Thanks for any help / wisdom you can provide!
Jeff