Tuning Question

[Mystify. 10+ year member]

Hello,

I'm constructing a box that has a net volume of 2.3 ft^3. I'm using two 3" round ports and wanting to tune the box to ~30Hz. Whenever I calculate port length I get ~16 in. My question is, do I make each port 16" or 8"? Also, is there a disadvantage in sound quality when using two ports over one?

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[supa_c 5,000+ posts]

16" per port, you dont divide the port length by the amount of ports you have

 

[Mystify. 10+ year member]

16" per port, you dont divide the port length by the amount of ports you have

Thanks. Just making sure before I cut the ports to length. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[supa_c 5,000+ posts]

Dont glue them either, just wrap them in tape.

If you glue you cant adjust the tuning ever.

 

[Mystify. 10+ year member]

Dont glue them either, just wrap them in tape.If you glue you cant adjust the tuning ever.

Never thought about that, thanks. Do you know if two ports will degrade sound quality if compared to one port at the same frequency?

 

[Rawr-DQ 10+ year member]

I don't think so, it'll pretty much just add to the port area, reducing velocity and increasing the tuning hz...you'll want to make each port longer if you want to keep the tune low.

 

[iamamp3pimp 5,000+ posts]

ohe part hta twas left out is that that isnt very much port area.

but GL with the build.

 

[supa_c 5,000+ posts]

Someone is drunk....

If its a 12" sub dual 3's should be fine

 

[Mystify. 10+ year member]

Someone is drunk....If its a 12" sub dual 3's should be fine

Yea, it's a 12" IDQ. I'm going to be switching over to a Mag or Fi Q once I get the funds.

 

[supa_c 5,000+ posts]

More than enough for the idq, just enough for a mag/Q

 

[Mystify. 10+ year member]

Just an update.

I finally got the box done and boy does it sound great. Better than my sealed box. It can handle fast double bass better than my sealed and can dip into the low end with authority. I'll never go back to sealed boxes again. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif