External port question

[Slo_Ride]

Almost all of the boxes I've seen with external ports have the ports to the side with the subs up. If I put external aeros on the same side of the box as my subs will it make a difference in output?

[tommyk90]

What kind of vehicle?

[Slo_Ride]

MR2, two seater mid engine car. Box will be behind seats

[tommyk90]

The reason most people do external aeros is to get a higher SPL score for competitions.

Honestly, you won't notice much, if any, difference in output versus having them normally mounted.

[Slo_Ride]

I'm thinking of running them because I have very little space and running externals will allow me to build a larger box.

[Slo_Ride]

Box is 2.4 cubic feet, will two 3" ports be enough or should I use two 4" ports?

[tommyk90]

I'm thinking of running them because I have very little space and running externals will allow me to build a larger box.

If it allows you have more airspace, then no harm done. :)


Box is 2.4 cubic feet, will two 3" ports be enough or should I use two 4" ports?

What kind of sub(s) and power?

[Slo_Ride]

Four sundown E8's powered by a Sundown sae-1200, 1200 watts at 1 ohm.

[93dakota]

I would go with the 4" ports but two me that still seems a little small you may want to get 3 4" ports. Though you could probably get away with just the two because they are aero's.

[Slo_Ride]

No way I can do three 4" ports, dont have the room. I can barely fit two 4" ports. Two 3" ports would be much easier because of the difference in length. I want to run two 3" ports but not if I'm going to lose any output versus two 4" ports.

[tommyk90]

2 4's would be the minimum I would do.