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GCAdidas13
07-06-2005, 05:15 PM
I am designing a box for two avalanche drivers that I would like to submit for approval.

I'm going for 7-7.5 cubes net for the pair and will be firing upwards.

The port will be 37.5"wide and 1.625" tall, and somewhere around 40" long.

The port has four bends in it. The port side veiw is like so:

http://img279.imageshack.us/img279/8704/untitled2pi.jpg

The port opening will be situated near the very front of the trunk.

The subwoofers will be firing upwards toward the trunk lid, and about 4" off the back of the trunk.

Will I have any problems with port resonance?

Will I have any problems with cancellation?

Thank you.
Brian

snebes
07-06-2005, 05:55 PM
that port is a very bad idea....stay in a 1:6 ratio (or close to, 1:8 is cool too) for the lenght:width of a port....

snebes
07-06-2005, 05:56 PM
I mean stay within that range, the width doesn't have to be 8 times the length (or vice versa)

ngsm13
07-06-2005, 06:18 PM
Yeah...REALLY bad idea on the port...in ALL ways. The dimensions and the mix-match of different types of bends...

Oh, and good to know the secret message in your port...did you guys write it in there during the circle jerk?!?!? Or was that during the reach-around????

Andrew and brian sittin in a tree...well you know the rest ;)

NG

InhumanAcura
07-06-2005, 06:22 PM
Oh, and good to know the secret message in your port...did you guys write it in there during the circle jerk?!?!? Or was that during the reach-around????

Andrew and brian sittin in a tree...well you know the rest ;)

NG

:confused: what am i missing?

theCybe
07-06-2005, 06:58 PM
It's the team Ghey port.

G

ngsm13
07-06-2005, 08:23 PM
:confused: what am i missing?

Apparently there's a hidden message inside Mr. Brian's port or something...one of the, more than likely, many homosexual things done on Brian's sleepover party for a few days at REQ's ;)

NG

Rawr-DQ
07-07-2005, 01:45 PM
WQOOOOOOQQQOQOQOQOOQOOQOQQOOOOQQQ...

mK

bcarpenterfhl
07-07-2005, 02:12 PM
these labrynth style pors barely save much volume. i dont understand why they are used so often, unless your box is super skinny.

Goldtaz1
07-07-2005, 02:19 PM
that port is a very bad idea....stay in a 1:6 ratio (or close to, 1:8 is cool too) for the lenght:width of a port....


I am not familiar with this ratio talk. Is that 1 inch of width for every 6 inches of height??

GCAdidas13
07-07-2005, 04:02 PM
The port HAS to be huge and HAS to still leave room for two Avalanches. The original plan was to mount them firing up with ~11 inches of clearance on both sides of the baffle, so i could invert, or not, depending on how i felt about the situation. Therefore the port had to be crammed into the trunk near the front.

meh

snebes
07-08-2005, 01:40 AM
What I mean with the ratios....

lets say you needed to have a port area of 144", and you make the port 10"x14". That is good because 10:14 is 1:1.4, which is less than 1:8. If you made the port 4x36, it would be a 1:9 ration (which may sound ok, but is pushing it), it would throttle the sound waves and begin to create noise from the port.

Basically, the ratio is there so you it is known not to make a port to narrow that it will bring unwanted noise into the system.

Goldtaz1
07-08-2005, 09:32 AM
What I mean with the ratios....

lets say you needed to have a port area of 144", and you make the port 10"x14". That is good because 10:14 is 1:1.4, which is less than 1:8. If you made the port 4x36, it would be a 1:9 ration (which may sound ok, but is pushing it), it would throttle the sound waves and begin to create noise from the port.

Basically, the ratio is there so you it is known not to make a port to narrow that it will bring unwanted noise into the system.

Cool, thanks for the help.