Finally porting my Arrrr's...

[j3bus2k3 5,000+ posts]

Alright...I've been waiting to do this for some time and spring break is my only option....i'm inb/w choices on 4.0, 4.5 and 5 ft^3 all tuned at 34hz....which would ya'll say. I've only read replies in prior threads saying 2-2.5 per sub, so should i just cut it down the middle and go with 4.5ft^3? And another thing...on all 3 designs i had a 16" by 3", 3.5" and 4" port respectivly to the pre-mentioned sizes. Those big enough? And what kind of bracing, if any, should I throw in? Corner bracing, cross bracing...clue me in here guys. And should I concern myself with a double baffle? I've only built a sealed box, and a small ported box for a TB8...this is my first real build. Thanks in advance.//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Click to read more...

 

[j3bus2k3 5,000+ posts]

with all the Type-R users on this forum, and box builders in this section i figure I could get alittle help...please?//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[tommyk90 5,000+ posts]

That box size is good. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

As for the port area, i'd shoot for around 25 sq. in. per sub. You could roughly translate that into four 4" ports if you like.

 

[j3bus2k3 5,000+ posts]

is there going to be a real noticable diff (to the ear or mic) b/w 4.0-5.0ft^3?

After reading your post tommy, i'll shoot for the 16"x3.5" port; that'd give me exactly 56in^2 of port area.

 

[j3bus2k3 5,000+ posts]

bump...I'm really looking to see what you guys think about bracing this things...

 

[tommyk90 5,000+ posts]

is there going to be a real noticable diff (to the ear or mic) b/w 4.0-5.0ft^3?
After reading your post tommy, i'll shoot for the 16"x3.5" port; that'd give me exactly 56in^2 of port area.

4-5 cubes is a big difference, i'd say that 2 cubes per sub is a little on the low side.

 

[twistedtrik 10+ year member]

I run mine 5.0ft^3 tuned to 32hz. Single side port in a shared chamber. Sounds great to me.

 

[j3bus2k3 5,000+ posts]

I dont know if this matters, but I'm running the '03 type-r's...5ft^3 just as good for them as for the '05's?

Twisted, did u brace the corners or at all for that matter?

thanks for the replies.

 

[twistedtrik 10+ year member]

I didn't brace it at all. It is built with 3/4 MDF, Elmers Probond and 2in. 18 ga. brads. I thought about using the moulding idea for bracing and smoother inner corners, but didn't get the stuff in time ( I have very little patience //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif)

 

[j3bus2k3 5,000+ posts]

I'ma just throw in some corner braces for good measure....cant hurt anything by doing it.

 

[nissanrider06 10+ year member]

i would do 5 cubes and 60 sq inches of port

 

[regal8r 5,000+ posts]

with all the Type-R users on this forum, and box builders in this section i figure I could get alittle help...please?//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

i can tell u tomorrow...just finishing up a 4cf 30hz ported box..it should wang lol

 

[mazdakid 5,000+ posts]

I didn't brace it at all. It is built with 3/4 MDF, Elmers Probond and 2in. 18 ga. brads. I thought about using the moulding idea for bracing and smoother inner corners, but didn't get the stuff in time ( I have very little patience //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif)

and you have no flexing with a 5cuft box without bracing?

 

[Astyl 10+ year member]

If youve got a Alpine Type R, youve only got half of the dream my friend... get a TCAB, dont bother with any other boxes

 

[j3bus2k3 5,000+ posts]

I can build a box for less than $50 dollars...i'm not willing to shove out the quoted $300. I know they get results and mad props to Mark for it, but I'm just not willing to spend it.

 

[j3bus2k3 5,000+ posts]

Here she is all modeled up...I threw in 3 1" Dowelsas bracing but again....should I even worry. I've settled on 4.5ft^3 @34Hz with a 16"x4"x29.5" port. all measurments displayed should be right on.



and obviously...no top is shown.

 

[j3bus2k3 5,000+ posts]

penny for your thoughts....via paypal //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

 

[j3bus2k3 5,000+ posts]

no one wants a penny?! jeez, whats a guy got to pay for opinions these days...

 

[dleccord 5,000+ posts]

looks nice

 

[twistedtrik 10+ year member]

and you have no flexing with a 5cuft box without bracing?

If there is, it isn't enough to matter. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif