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kyle7560
03-22-2008, 03:58 PM
I'm building my first box with a flared psp port and I used the psp port calculator to find the length and i was wondering if the length the give me is the length the tube needs to be or the length including the flares. Any help would be greatly appreciated.

hoxie08
03-22-2008, 04:01 PM
i believe the tube not including flares... but let someone else chime in too lol

kyle7560
03-22-2008, 04:05 PM
ok thats what i thought. thanks

bjfish11
03-22-2008, 05:21 PM
Its the length of the entire port assembly.

BrianChia
03-22-2008, 05:56 PM
The effective port length is typically the tube plus 1/3-1/2 the length of each flare depending on the size and dimensions of the flare. I'm not sure if the PSP calculator takes that into account or not. The difference is usually negligible if you're using multiple or fairly large ports.

bjfish11
03-22-2008, 06:38 PM
I believe in the instructions included with the port, when figuring the length it says to sub tract 6" (length of the combined flares) for a 4" port, and cut the tube at that.

SPL Blazer
03-23-2008, 11:59 AM
Where do you get your info from? Holy crap, does anyone research things before giving advice? Look at their website, and under the "installation instructions" link you choose what size your using. The 2" aero port requires 4" to be cut off, and the 3", 4" and 6" ports all say to trim 5" off.

60ndown
03-23-2008, 12:04 PM
Where do you get your info from? Holy crap, does anyone research things before giving advice? Look at their website, and under the "installation instructions" link you choose what size your using. The 2" aero port requires 4" to be cut off, and the 3", 4" and 6" ports all say to trim 5" off.

newb pwns :veryhapp:

SPL Blazer
03-23-2008, 12:15 PM
newb pwns :veryhapp:

lol, I'm a noob on this forum but I've been around others for awhile. I prefer the Termpro forums.

And the PSP calculator is pretty ****ed good too. I used their calculator for my most recent enclosure and then tested it with my Termlab meter and it was dead on. Very good calculator.

bjfish11
03-23-2008, 12:18 PM
Where do you get your info from? Holy crap, does anyone research things before giving advice? Look at their website, and under the "installation instructions" link you choose what size your using. The 2" aero port requires 4" to be cut off, and the 3", 4" and 6" ports all say to trim 5" off.

Sorry I was 1" off... Thats why I said, I believe thats what it was. I figured someone that had a port could read the instructions for sure. :)

bjfish11
03-23-2008, 12:33 PM
And actually, it depends on how you calculate it for sure. In a sense, both of us were correct.

I found the installation instructions included with a 4" port. It has the formula for lv. Once calculated, it says subtract 5". Then when its assembled, a flared port will be 1" longer than lv. Well on the psp-inc site, it has length for both straight and flared ports. If you use the flared port length, you need to subtract 6" off the length and cut the tube at that (because it has already added the extra 1" onto the lv). But if you use the straight port length, subtact 5" so that you can gain the extra 1" on overall port length.

SPL Blazer
03-23-2008, 12:40 PM
But using the straight port length isn't for the aero port, it's for a regular round tube port.

bjfish11
03-23-2008, 05:11 PM
But using the straight port length isn't for the aero port, it's for a regular round tube port.

Thats what I was saying. The standard formula for giving you port length with yield a length for a straight port. With a flare, you have to add an extra inch.

But thats where it can get confusing when talking about trimming 5" off or 6" off.

pr-festiva
03-23-2008, 06:18 PM
So for a ten inch flared port in 4cubes tuned to 61 hz the length with out flares will be 7.91? then add the flares to the end.

bjfish11
03-23-2008, 06:57 PM
No, it will be 7.91" long with the flares attached. So to calculate the length of the straight piece, take 7.91 and subtract the length of the flares.

Alexwaves
03-24-2008, 07:35 AM
what is the www adress for the psp calculator

iDesignBoxes
03-24-2008, 03:36 PM
what is the www adress for the psp calculator

http://www.psp-inc.com/