PDA

View Full Version : New Box Questions



qtipextra
01-19-2009, 01:33 PM
Alright guys, I am wondering:

#1: Are there any problems with having the port like this (not the full height of the box):

http://img187.imageshack.us/img187/2852/box1bw8.jpg

#2: I need help with the effective port length when you need to bend it around:
Is the effective port length correct?

http://img187.imageshack.us/img187/1370/box2wr0.jpg

Mike465
01-19-2009, 01:42 PM
Um if you are looking for a certian amount of port area take the port all the way down the box and adjust the width of it to give you the area you need

qtipextra
01-19-2009, 01:57 PM
Um if you are looking for a certian amount of port area take the port all the way down the box and adjust the width of it to give you the area you need

I already have the port area where I need it with it that way. = 66 Cubic In.

The reason I have it like that is because I have a false floor that comes up 5", and I do not want to box on the false floor.

qtipextra
01-19-2009, 06:02 PM
Or, I could have the port be the height of the box, which is 15", but then the opening would have to be 9". I don't think that would be a very good idea.

qtipextra
01-19-2009, 07:15 PM
So my box would end up looking something like this:

http://img382.imageshack.us/img382/766/boxxg1.jpg

qtipextra
01-28-2009, 12:28 AM
Bump for the question on port not being the full height of the box.

BrianChia
01-28-2009, 05:58 AM
#1: Yes it will work just fine.

#2: The effective length will extend past the port wall by approximately 1/2 the width of the port.

DonH
01-28-2009, 02:31 PM
should work fine a port is a port as long as its tunning is correct.

Alex JB
01-28-2009, 02:57 PM
like BrianChia said... don't forget that you are creating a bottle neck if you just threw in the 45 peice in the corner though.

most people say 45's are a good idea, I agree, but take it to the extreme and think if you had a 45 in the corner that stuck out 3 0r 4 inches from the corner... major restriction in airflow and would mess up the tuning.

Immacomputer
01-28-2009, 08:01 PM
most people say 45's are a good idea, I agree, but take it to the extreme and think if you had a 45 in the corner that stuck out 3 0r 4 inches from the corner... major restriction in airflow and would mess up the tuning.

Well that's not true. Adding a 45* angle piece in the port so that the edge of the inside corner of the port wall is the ports width away from the center of the 45* piece will take away the extra air mass that is added by having a 90* bend. It will also prevent corner loading at the bend which can cause turbulence.