matching enclosure spec’s to sub spec’s

Instead of trying to find a prefab enclosure that will work with your sub you should either build your own enclosure or get an enclosure custom built for your sub. That will improve performance and result in better overall sound.

Since the prefab enclosure didn't give you a tuning frequency (at least you didn't give one in the specs) I would guess it is tuned pretty high. I would not be surprised with a tuning frequency of high 30s or even low 40s. Having a tuning frequency this high can result in more output but it will also mean a loss of sound quality. So having an enclosure with that high of tuning would likely not be ideal for what you are looking for.

The port velocity would be the velocity of the air through the port of the enclosure. You want to have a low air velocity through the port or you will have port noise. The number that was given was most likely the velocity through the port given as a percent of the speed of sound. So that means the air velocity through the port is 5.5% of the speed of sound. You typically want to have less than 10% air velocity with around 5% being ideal. Sub displacement is that amount of volume the sub is going to take up inside the enclosure. The 0.05 means that the sub will take up 0.05 cubic feet of space inside the enclosure. You need to account for this as it does not count in the internal volume of the enclosure.

That IS a regular ported enclosure.  It's just for two subs...

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ok, maybe the port itself is regular, but every other ported box you try to buy isnt a maze look like that. its just the basic one piece of wood port. assuming its a slotted port and not rounded ports of course.

There isn't anything wrong with single (basic) ports. It all boils down to the required port length required for the desired tuning frequency. Some boxes look like mazes because they NEED to have the port length to achieve the specified tuning frequency.

Since you are not totally up to the idea of making your own enclosure, I would recommend the biggest pre-fab box you can find for your sub. If you later find that desire to build an optimum enclosure there are a lot of "old school legends" on this forum who will be glad to help you figure out all the specs.

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Still learning

Kraco

im not saying "basic" ports are bad, like i said already i've had basic ones before and they sounded fine. im fairly new to this but it seems like everyone always says "your subs are only as good as your enclosure" but the only diffrence i see in pre-fab'ed boxes is either a slotted port or round. thats why i was looking into getting that box, to see if it would make my subs sound better. but it looks like the only responses im going to be getting are "make your own enclosure" lol

Pre-fabs are made on a generalization of the size and tune for the size sub. An enclosure built for the spec for YOUR sub and tuned to your application will outperform a pre-fab any day of the week. Not to mention most pre-fabs are built with sub-par materials and construction techniques. Hints why going pre-fab is not as good as doing it your self or having a custom enclosure built.



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What subs are you using? That may help us determine a prefab that would actually work. There are some enclosures on ebay that are not bad with specs around what you need.

The "maze" port is not going to be any better than a "regular" port. A port is a port so the configuration is not going to make much of a difference. The length and cross sectional area are going to be the biggest factors in how well designed a port is. Actually, a port that has a lot of turns can actually decrease performance as there will be energy lost around the turn of the port.   

The enclosure you pictured actually looks very similar to Diamond Audio's recommended port design for some of their subs. If that is the case then you would have a very high tuning (around 40Hz) and small internal volume (around 1.25 cubic foot per chamber would be my guess). So that would actually be far from the manufacturer recommended enclosure. I would guess the 2.0 cubic foot volume did not include the port or sub displacement.

Also, is there a slant on the front of the enclosure or the back? If the slant is on the back it would be bad as the port area would change. This would not be a proper port design.

im gonna be using 2 audiobahn dub200's