win isd question

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06-10-2004, 09:01 PM

NTOXKTD

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Does Win Isd account for port diplacement in it's calculations? If I enter 6 cuft of box volume and a 10x12 port (125 sq in) does it subtract the port area from the box volume I entered, and tune it to the volume left over?

06-10-2004, 09:05 PM

Shaughn Murley

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no, no it does not.

06-10-2004, 09:44 PM

Bulldogger

2000 Watt CAFz'r

Join Date: Feb 2002

Posts: 2,474

It does not take into account.... port, subwoofer, or bracing displacement.

06-10-2004, 11:30 PM

Jmac

500 Watt CAFz'r

Join Date: Jan 2003

Posts: 575

You have to do all that by yourself ...

06-11-2004, 04:46 AM

NTOXKTD

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so whatever the port volume is has to be added to the box volume I enter in the program.

06-11-2004, 04:50 AM

Derek Jerome

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yeah win isd is just net displacement, all port, bracing and woofer volumes have to be added to that volume

06-11-2004, 07:23 AM

Bulldogger

2000 Watt CAFz'r

Join Date: Feb 2002

Posts: 2,474

tisk...tisk

This will help people trying to use win isd

06-11-2004, 09:28 AM

Jmac

500 Watt CAFz'r

Join Date: Jan 2003

Posts: 575

You can go much higher than 18 m/s for open-cabin vehicles and 21 m/s for trunked vehicles without port noise ...

You should also take into account the type of music you listen to. If you listen to mostly rock, a peak velocity of 30 m/s @ 30 Hz isn't going to matter much if it's dropped down to 20 m/s @ 45 Hz ...

You should also take into account that, if you're using PVC, the longer the port is, the more port resonance you will get.

Also, less bends in the port means less resistance which equates to higher SPL and more accurate tuning.