pole vent clearance

[rodburner 10+ year member]

Only found one number in the search,1 inch,and was wondering if that is the generally accepted minimum clearance? My hybrid enclosure is steel and 3/4" birch plywood.I can cut out the bottom and weld it a little deeper,but I'm trying to avoid raising the front baffle with another layer.

This all fits in the jack well of my pickup,hence the odd shape..

Thanks.

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[hispls 5,000+ posts]

Likely it won't change performance audibly, but if it's too tight don't expect the benefits of cooling.

 

[on1wheel01 10+ year member]

Thats why u do a google search using ca.com Instead of making another thread on this.

 

[Kangaroux 5,000+ posts]

I usually like to do at least 1 1/2" but if the sub you are running isn't very high powered or high xmax I think you will be fine with 1"

 

[wenn_du_weinst 10+ year member]

Likely it won't change performance audibly, but if it's too tight don't expect the benefits of cooling.

pole vents don't help cool, subs with plugged vents cool better.

 

[Kangaroux 5,000+ posts]

pole vents don't help cool, subs with plugged vents cool better.

Only if the sub has built in cooling in the motor on the top plate or a drilled out basket.

 

[rodburner 10+ year member]

I guess my initial searches were too specific,too many words,as I only got one hit. I'll try to dumb it down when searching. Thanks.

And the sub in question is an Alpine R12. [new style]

thanks again

 

[Kangaroux 5,000+ posts]

I guess my initial searches were too specific,too many words,as I only got one hit. I'll try to dumb it down when searching. Thanks.

What sub are you running and how much power?

 

[kmanian 5,000+ posts]

you will be safe if you keep the same distance as the diameter of the vent.

at an absolute minimum get half the diameter of the vent.

 

[hispls 5,000+ posts]

pole vents don't help cool, subs with plugged vents cool better.

Really? Never heard that theory before. Care to elaborate? Every manufacturer I've ever seen use it claim it is for cooling.

 

[wenn_du_weinst 10+ year member]

It increases air flow directly to the coil with it plugged. It will push and pull cool air instead of having a dead spot around the coil like pole vented subs do. The vent is to release pressure from under the dustcap and increase efficiency and to reduce noise. That is why you usually see big spl subs with small or no vents. I know sundown had a pole plug option on the nightshades for a while.

 

[rodburner 10+ year member]

What sub are you running and how much power?

New style Alpine SWR1223D with 500w from a JL900/5.

 

[Kangaroux 5,000+ posts]

New style Alpine SWR1223D with 500w from a JL900/5.

1" of clearance will be fine.

 

[wenn_du_weinst 10+ year member]

Only if the sub has built in cooling in the motor on the top plate or a drilled out basket.

What sub has a sealed basket? 90% use a 12spoke or similar and all have vents. vents in the top plate only weaken motor strength.

 

[Kangaroux 5,000+ posts]

What sub has a sealed basket? 90% use a 12spoke or similar and all have vents. vents in the top plate only weaken motor strength.

My 18 has a sealed basket with spacers in between the top plate and the basket to increase cooling. All depends on what the sub needs to be for.