What CF and tuning is this box???

[bhsaudio 10+ year member]

I was wondering if anyone could tell me the cf and tuning of this box.

42"w - 17"h - 17 1/2"d

Port is 15 3/4"h - 3"w

Thx in advance..

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[-01limited- 10+ year member]

what thickness is the material its made out of?

 

[bhsaudio 10+ year member]

3/4"

 

[Cruzer 10+ year member]

without knowing port length im gonna guess 5 cubes @ 34hz

 

[bhsaudio 10+ year member]

would that be 5cf after port displacement or before??

 

[Cruzer 10+ year member]

after

 

[pro-rabbit 5,000+ posts]

How long is the port? Any bracing or 45s also what sub or subs and what size subs?

 

[bhsaudio 10+ year member]

I am not sure of the length of the back port wall I would need to remove subs to take that measurment. Yes 45's in all 4 corners plus 1 where the port makes its 45 bend. Bracing is only one 1/2" dowel rod. Subs are 2 re mx 12's trying to figure out what cf and tuning I want for my new box that will use 4 mx's.

 

[bhsaudio 10+ year member]

Any idea on how many cubic inches of port it has?? Or do I need to get the length of the back piece of port to know that?

 

[Cruzer 10+ year member]

port area: 47.25 in²

 

[bhsaudio 10+ year member]

Thx cruz

 

[Cruzer 10+ year member]

np

 

[pro-rabbit 5,000+ posts]

Port area is right but no way to be close on space or tuning with out knowing the length of the port. Also is the box double baffled?

 

[Cruzer 10+ year member]

i used a program, no idea how accurate it is.

i entered everything he gave, then added port length until it made sense. for example with 0 port length it was tuned to like 67hz or something, add 10 port length it was idk 45hz, once i got to 15 port length it started getting somewhere, it was 35hz, but box size was some random #, so they had to build the box size right at a certain # or slightly above to account sub displacement. once u hit like 17 or 18 port length it got to be a little over 5 cubes and it was 33-34hz tuning, so the objective of the box must be 5 cubes at 32-34hz tuning.

best i could come up with, granted the program is accurate that is

if im wrong sorry was just a guess with what info i had

 

[pro-rabbit 5,000+ posts]

I'm trying to help you here. In order to help we need to know the length of the port. Also what size sub(s) and what kind are going in it. Answer these questions and we can answer yours completely.