Switching to BTLs

[JustinT 0]

Well my mojos are starting to suck...blew a coil actually. And now its time to upgrade to BTLs

I'm stuck between 2 15s or 2 18s

Here is the scenario:

The ports will be outside the box.

I am going to use these ports...

Deal Breaker for 15s: the only practical option is to use 1 of those ports for 8 cubes

Fi recommends 12 - 16 square inches of port per cube

8cuft x 12 = 96

8cuft x 16 = 144

So about 96-144 sq inches recommended.

that port is only 70 sq in.

Would that be a problem?

Deal Breaker for 18s: The only problem for the 18s (using 2 of these ports) is that the box would simply be too long to conventionally mount the ports outside the box...

So to still be able to show off those peerrrty port flares, I was going to mount half of them inside the box and the other halves outside the box with the joiner PVC glued into the side of the box.

My problem with this is that the inside port flare is going to be about 12 inches inside the box rather than flush with the wood like the 15s would be.

Is this going to pose a problem with the function of the ports?

So...15s or 18s?

[UpGradde 7]

why dont you use both ports for the 15's for a total of 140 sq in. of port?

[BigCProductions99 21]

why dont you use both ports for the 15's for a total of 140 sq in. of port?

x2

Common Chamber?

[Nate197 0]

why dont you use both ports for the 15's for a total of 140 sq in. of port?

x2

Common Chamber?

Where do you get port tubes that big from?

[phresh 0]

Not to thread jack or anything but what does more port area mean and do for the sound?

[Duran 387]

Not to thread jack or anything but what does more port area mean and do for the sound?

Output increases.

[SpeakerBoy 64]

Is that a port or a section of a subway tunnel

Edited August 16, 2009 by DeepSubBoy

[Adrian_D 520]

Meh, those ports are small

That is a cutout for an 18.

If you don't plan on a competition-only box, go for a regular slot port. Port area for competition, build and test is the only way of knowing for sure which is best.