PDA

View Full Version : Quick question on ports



cx-7heaven
06-11-2009, 07:36 PM
I need to know what this box is tuned to:

4.56 gross cu ft
port is 4.5d x11w x 11 long

thanks

skmfkr
06-11-2009, 07:41 PM
gross doesnt matter whats the net retard

DonH
06-11-2009, 07:41 PM
net yo!

whats the net!

give dimensions of the box and i can figure out the net if you want. doesnt have to be inner dims just tell me outer

cx-7heaven
06-11-2009, 07:45 PM
net is around 4.2

Dims: wedge box

40.25 w
20 h
16 d1
9 d2

skmfkr
06-11-2009, 07:49 PM
lol did you just make one with random port area and port length? i think its like 41hz

cx-7heaven
06-11-2009, 07:49 PM
No, this is a box somebody else made

skmfkr
06-11-2009, 07:52 PM
oh i know kids back in high school would do ported boxes. but didnt know how to properly make one. actully one of my friends made one. and i think i figured it was like 1.5cf at 45hz for a audiobahn 12

cx-7heaven
06-11-2009, 07:52 PM
This is the box that stroker 15 is in that I told you about the other day

DonH
06-11-2009, 07:56 PM
hmmm

~41 hz bro

cx-7heaven
06-11-2009, 07:57 PM
when you change port length what does that do?

skmfkr
06-11-2009, 07:59 PM
shorter is tuning higher and longer is tuning lower. assuming the box stays the same net volume, but it will change a little if you make the port longer the sub has less space to use and the port shorter it has more room.

cx-7heaven
06-11-2009, 08:01 PM
hmmm

~41 hz bro

Thanks much for your time.

cx-7heaven
06-11-2009, 08:02 PM
shorter is tuning higher and longer is tuning lower. assuming the box stays the same net volume, but it will change a little if you make the port longer the sub has less space to use and the port shorter it has more room.

So, if I go to a smaller box, tuned to 30 hz my power handling will go up and tuning will be more daily correct?

DonH
06-11-2009, 08:14 PM
in essence yes...but to small of a ported box will sound like crap. what driver?

skmfkr
06-11-2009, 08:23 PM
yeh smaller boxes are more peaky or have a narrow freq response, but since your wanting to do spl it should be fine. kinda hard to get a good spl and daily box out of one box. say for example a good burp box would be like 3cubes at 40hz and a good daily would be 4cubes at 30hz. then you could do in the middle and 3.5 at 35hz which would be good for both imo