bracing question...

[regal8r 5,000+ posts]

will i need bracing for the ported box for my type r's...it will be 4 cf tuned to 30 hz single chamber, and if i do need bracing, what would be the most cost effective to use?

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[PhatTonyDeMarco 5,000+ posts]

It never hurts to brace... But I woulnt bother on a 4 cube box.

 

[regal8r 5,000+ posts]

a buddy of mine said to just build it and then put a coin on top of the box, if it doesnt jump then leave it but if it does then it needs bracing...is this a good way to tell?

 

[PhatTonyDeMarco 5,000+ posts]

a buddy of mine said to just build it and then put a coin on top of the box, if it doesnt jump then leave it but if it does then it needs bracing...is this a good way to tell?

//content.invisioncic.com/y282845/emoticons/hilarious.gif.02a037aad04aa96f19982b298a3d70a8.gif No, that will not tell you anything other than if your subwoofer has output...

 

[regal8r 5,000+ posts]

ok, are there any other things that i need to know before building my box?

 

[regal8r 5,000+ posts]

ttt

 

[MikeyB 5,000+ posts]

Measure twice, cut once!

 

[regal8r 5,000+ posts]

also, what do u guys think of the box described above for 2 type r 12s, its got 60^in2 of port area, 39 in long...will 36x23.75x15 (outside dimensions) give me 4cf??

 

[MikeyB 5,000+ posts]

Just internal is 5.99, 1.35 of port disp, so 4.64 before sub displacement.

 

[MikeyB 5,000+ posts]

38.5 for the port length, 4ft^3 tuned to 30Hz with 60in^2 of port gives me 38.5 inches long. Just want to make sure all your stuff is right for ya. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[regal8r 5,000+ posts]

do u think .5 inch will affect tuning that much tho???

 

[MikeyB 5,000+ posts]

yes

 

[MikeyB 5,000+ posts]

prolly not enough to notice //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif