Sundown SA-15 Enclosure Ideas?

[EraOfDiscovery]

So here is a suggestion, power: to sub(s) rated, amp subsonic filter to 28Hz, minimum port clearance 7 3/4", figure is just an assembly guide:

I knew you would peep in sooner or later lol you helped with my 2 type r ported box too. Question, how much output (if any) will I lose by going with a shared slot port as apposed to aeroports? Thanks so much Joe!

[Joe X]

Regardless of what you end up doing it's the right move to increase cone area, 2 low to medium power 12s are not going to make a basshead too happy in a larger vehicle, sealed won't help either.

In regards to the above, flared round ports can handle better higher airspeeds and so if you did 2 6" flared aeros or about 56 square inches of port area that will definitely outperform a 56 square inches slot port easy, but having a slot with much larger area as the above will show strong performance too. a 3 6" round port box would be nice but the long ports length to tune to 32Hz would force a narrower, deeper box to fit them, regardless it can be done as long as there is clearance to the rear gate.

[EraOfDiscovery]

Regardless of what you end up doing it's the right move to increase cone area, 2 low to medium power 12s are not going to make a basshead too happy in a larger vehicle, sealed won't help either.

In regards to the above, flared round ports can handle better higher airspeeds and so if you did 2 6" flared aeros or about 56 square inches of port area that will definitely outperform a 56 square inches slot port easy, but having a slot with much larger area as the above will show strong performance too. a 3 6" round port box would be nice but the long ports length to tune to 32Hz would force a narrower, deeper box to fit them, regardless it can be done as long as there is clearance to the rear gate.

About how much port area does that box you designed have?

[Jeff4661]

Regardless of what you end up doing it's the right move to increase cone area, 2 low to medium power 12s are not going to make a basshead too happy in a larger vehicle, sealed won't help either.

In regards to the above, flared round ports can handle better higher airspeeds and so if you did 2 6" flared aeros or about 56 square inches of port area that will definitely outperform a 56 square inches slot port easy, but having a slot with much larger area as the above will show strong performance too. a 3 6" round port box would be nice but the long ports length to tune to 32Hz would force a narrower, deeper box to fit them, regardless it can be done as long as there is clearance to the rear gate.

About how much port area does that box you designed have?

My math shows 184.0625 inches squared

[Joe X]

Regardless of what you end up doing it's the right move to increase cone area, 2 low to medium power 12s are not going to make a basshead too happy in a larger vehicle, sealed won't help either.

In regards to the above, flared round ports can handle better higher airspeeds and so if you did 2 6" flared aeros or about 56 square inches of port area that will definitely outperform a 56 square inches slot port easy, but having a slot with much larger area as the above will show strong performance too. a 3 6" round port box would be nice but the long ports length to tune to 32Hz would force a narrower, deeper box to fit them, regardless it can be done as long as there is clearance to the rear gate.

About how much port area does that box you designed have?

Basically 122 square inches of port area.

[EraOfDiscovery]

Regardless of what you end up doing it's the right move to increase cone area, 2 low to medium power 12s are not going to make a basshead too happy in a larger vehicle, sealed won't help either.

In regards to the above, flared round ports can handle better higher airspeeds and so if you did 2 6" flared aeros or about 56 square inches of port area that will definitely outperform a 56 square inches slot port easy, but having a slot with much larger area as the above will show strong performance too. a 3 6" round port box would be nice but the long ports length to tune to 32Hz would force a narrower, deeper box to fit them, regardless it can be done as long as there is clearance to the rear gate.

About how much port area does that box you designed have?

Basically 122 square inches of port area.

So in all reality, going with aeroports wouldn't make THAT much of a difference? Plus it would save me alot of money.

[Joe X]

My math shows 184.0625 inches squared

It goes like this, external height less three 3/4" layers is 18-2.25 = 15.75, 15.75 x 7.75 = 122.0625 or 122 5/80 is the cross-sectional area of the port.

[Joe X]

Basically 122 square inches of port area.

So in all reality, going with aeroports wouldn't make THAT much of a difference? Plus it would save me alot of money.

Compared with a standard two 6" round port box there wouldn't be that much of a difference performance wise.

[EraOfDiscovery]

Basically 122 square inches of port area.

So in all reality, going with aeroports wouldn't make THAT much of a difference? Plus it would save me alot of money.

Compared with a standard two 6" round port box there wouldn't be that much of a difference performance wise.

Alright awesome! One more question. (1) Sundown SA15 has .17 cubic feet of displacement. Would inverting the subwoofers help by giving more airspace? (I can't find how much they add when inverted.)

[Joe X]

The displacement would be added to the net volume not subtracted, just need to determine the volume of the cone delimited by the radiating surface, can't calculate without a diagram but it will be certainly small compared to the box net volume.