Box Modification SPL Gains

[soundstreamer]

is the pvc tube the port? or just a pvc tube at the bottom

Its a cut piece of PVC over the lip of the port. Seems to increase scores more often than not. It worked for me the one time I tried it...I should try it on my next box now that i think of it...

[sundownz]

Indeed - it goes along the edge of the port. It is screwed down in place and will eventually be fiber-glassed in.

[bball09124]

Have you ever tried inverting the speakers? I would be curious to see if you gain or lose with the speakers inverted in your application.

[sundownz]

Have you ever tried inverting the speakers? I would be curious to see if you gain or lose with the speakers inverted in your application.

Haven't tried it since I can't do it for any organization that I compete in

[hrtbrk1]

dang...that pipe is doing work son

[Fuknmovin]

Could the piece of pipe be used in any ported application? I am getting ready to build my 6th order bandpass designed by 80Inches and I wonder if it would help?

[sundownz]

Could the piece of pipe be used in any ported application? I am getting ready to build my 6th order bandpass designed by 80Inches and I wonder if it would help?

Quite possibly - I have only tested it in this type enclosure. All three boxes that have been in the Jeep have had this piece and all three have been quite loud.

[sikcavy]

that wouldnt work with slot vents would it?

[18inchjeepin]

he has a slot vent/slot port

[sundownz]

that wouldnt work with slot vents would it?

My port is a "slot" unless you are using the term differently.

[soundstreamer]

I'd like to see what happens if you try PVC on the outside of the port also...it might help and would be easy to install.
Also, if you have a bottom / rear firing port, try doing the top / rear corner of the box with PVC.

[astrolade]

My port is a "slot" unless you are using the term differently.

Jacob...have you tried the pvc in different ways....from what I can see it looks like you cut a 1/4 piece out of it. try cutting a little more, test, alittle more, test...etc

I do that when I test my bandpass and i have found that smaller pieces are better.

just a thought.


looking good by the way.

[Lakota]

The wood of your inside port edge isn't sanded/rounded over is it? If not, I wonder what change rounding the wood itself rather than adding a pvc round?

[ngsm13]

Cool.

nG

[2003F150]

Im definitely trying that pvc piece on the inside edge of my port....if I gain .3 that would be awesome!!!!!