*PICS* 6.6 cuft 33hz 140sq.in. of port for (2) 15's getting 3300rms

[skadude016 5,000+ posts]

Anyone have any more input on this Im about to make the cuts?

I really dont think it will make a big difference. I have my box for my 15 at 4.5 cubes with 115 sq inches of port and for daily driving i enjoy it. I doubt 40 extra sq inches will be a big deal

 

[skadude016 5,000+ posts]

if anything more port area should be louder //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[SHiZNiLTi 10+ year member]

Good Luck

Good Luck

Thx!

BTW in teh pics the line drew out of the port is the outter wall of it not the inner wall of the port. It looks bigger then it really is.

What does increasing (more) port area do anyways, I still have a hard time understaing it.

 

[Calikid 5,000+ posts]

vids when its done please.

 

[azbass 5,000+ posts]

vids when its done please.

 

[Calikid 5,000+ posts]

^^^ BaStArd!!

 

[tommyk90 5,000+ posts]

LOL, I should have never posted the sub in above pics. That sub isnt going to be used in this setup, it's just there as a reference 15, but it's a prototype for Atomic/American bass. It has 4" voicecoil with a super strong motor and takes 4krms, also weighs like 70+lbs.
Anyways back to topic...

Tommy if i reduce the port area to 100sq.in. that would mean making the port narrower to 6" instead of 8" which would also effect tuning and make it at 28hz which is way to low I want to stay at 33-34hz where im at now.

And why do u say max you would do is 100sq.in. of port. What effects will I see from having 140 compared to 100?

Having that much port area will decrease power handling, especially in a box of that size.

It MAY be louder, but it's not worth it. No sense in having a port that large if you aren't going to benefit from it.

Every box that i've built for 15's had between 35 and 45 square inches of port per sub, both daily driver and SPL boxes.

 

[TypeRBass 10+ year member]

i'll agree when tommy says thats a lot of port...i have 84 sq inches of port per 2 15's in my box...you'll have almost double that amount. eh.

 

[Decipha 10+ year member]

i have 130sq in of port on my 2 xxx 15s.. got them powered off an orion 2500d at a half and i loves it

 

[SHiZNiLTi 10+ year member]

Having that much port area will decrease power handling, especially in a box of that size.
It MAY be louder, but it's not worth it. No sense in having a port that large if you aren't going to benefit from it.

Every box that i've built for 15's had between 35 and 45 square inches of port per sub, both daily driver and SPL boxes.

Thats exactly what I'm not looking for //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif I'm worried that I'll be pushing the limit of the woofers allready and I want to make sure they aren't going to get over powered with my T30001bd. But on the other hand I do want it as loud as it can be.

Should I completely redesign this box? What should I do?

 

[tommyk90 5,000+ posts]

Thats exactly what I'm not looking for //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif I'm worried that I'll be pushing the limit of the woofers allready and I want to make sure they aren't going to get over powered with my T30001bd. But on the other hand I do want it as loud as it can be.
Should I completely redesign this box? What should I do?

Here's a possible solution.

Build the port as you want to right now, the big one.

Then build a variety of port plugs with different port areas.

See which one you like the best. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[bdawson72 5,000+ posts]

ahhhhhhhhhh

 

[SHiZNiLTi 10+ year member]

Every box that i've built for 15's had between 35 and 45 square inches of port per sub, both daily driver and SPL boxes.

i'll agree when tommy says thats a lot of port...i have 84 sq inches of port per 2 15's in my box...you'll have almost double that amount. eh.

Dont you guys run aero ports? With those I've heard you dont need to use as much port area.

 

[97cavy 10+ year member]

I have 4 15''s (soundstream t4's) in 11 cubes with 200sq'' of port and it works GREAT. Bassraces a 147 with less then 700 watts per sub

 

[Calikid 5,000+ posts]

done already???