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View Full Version : Space behind magnet question.

neonrt
12-17-2006, 08:52 PM
i know its been asked time and time again, but i could not get an answer from searching, just alot of non related stuff. Just need to know if 2" behind the pole vent on a sub will be enough in a sealed box. sub is an fi-q 15"

KidThump
12-17-2006, 08:55 PM
That should be enough.

davesexplorer
12-17-2006, 08:58 PM
I usually go by the radius of the pole vent (if it has one), try and keep at least that distance away from a surface.

PV Audio
12-17-2006, 10:36 PM
According to Dickason, you want at least 3" for a speaker, which is nowhere near the pole vent size of a subwoofer.

helotaxi
12-18-2006, 10:06 AM
According to Dickason, you want at least 3" for a speaker, which is nowhere near the pole vent size of a subwoofer.

What was his rationale for that?

lil azn 06
12-18-2006, 12:59 PM
3"? JL States all it needs is 3/4 of an inch at the least

helotaxi
12-18-2006, 01:30 PM
The minimum is usually the diameter of the pole vent. The reason being that the vent can be restricted for 1) optimum cooling of the motor and 2) restricting air flow through the pole vent will alter the sub's T/S parameters.

MikeyB
12-18-2006, 03:19 PM
The minimum is usually the diameter of the pole vent. The reason being that the vent can be restricted for 1) optimum cooling of the motor and 2) restricting air flow through the pole vent will alter the sub's T/S parameters.

x2, thats the rule I have always followed and I have never had a problem

billabongcr
12-18-2006, 03:21 PM
3"? JL States all it needs is 3/4 of an inch at the least

JL is a slanderous *****!

PV Audio
12-18-2006, 04:16 PM
What was his rationale for that?
To be quite honest, I didn't understand it at all. It's in the 6th ed. of the LDC. The book still still WAAAY over my head, so I couldn't even argue the point if I tried :)