Cuved PVC port

[j3bus2k3 5,000+ posts]

Or because the flared ends on TRUE round ports reduce the air turbulence that causes port noise? And they do in fact flow better than slot ports allowing you to get away with less port noise...

Just buy the **** flares and stick em on...

 

[Lakota 5,000+ posts]

Or because the flared ends on TRUE round ports reduce the air turbulence that causes port noise? And they do in fact flow better than slot ports allowing you to get away with less port noise...
Just buy the **** flares and stick em on...

I agree.

 

[req 5,000+ posts]

round ports done correctly = better airflow than slot ports.

its easier to get more area with slots, but theres less surface area to slow down the air molecules 'sliding' on the edges of the port. put some flares at the end and it helps even more.

just measure down the center and make sure you have enough port area for the box\sub\power //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[15nissen 10+ year member]

pvc pipe = lots of port noise
i just tried a box like that.

im throwing it in the fire and building a slot port tonight actually

it actually doesnt make the box that loud either

//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

thats because loud boxes of that sort use a flared port. You can not just stick"pvc pipe" in a box and expect it to wang. I feel its so much more work to make a slot port as loud then aero ports that its worth buying the ports from the e-net.

 

[ItalynStylion 10+ year member]

I'm building a box (with the help of chevyaudio an Jntar) that I will need to use the elbow piece too.

Since I am tuning to 30hz I need my two 2" ports to be about 18in long for my box.

Problem is my box is only 8 inches high and the ports will be on the top.

If I run the precision ports 6inches down, elbow towards the middle of the box and add a 12 inch piece what can I use to keep it from moving?

Here is a pic of what I am talking about...Ports from each top down and toward center

 

[Beginer 10+ year member]

So flared ports is better than simple pvc pipe?

But does it have any difference in SPL boxes?

Let's say we need two 6" width and 10"long ports. So does it has a lot difference what ports to use if it's SPL box?

 

[James Bang 5,000+ posts]

i didn't have luck with PVC/ABS pipes and elbows. I made a box for a 15" mag w/ two 4" pipes w/ elbows and it had port noise. I'd say go with flares if you go that route.

 

[ItalynStylion 10+ year member]

well yea of course flares would be used on both ends. How do you keep the port tube stable on the inside of the box? It just seems like the tube would wiggle around in there if it was long.

 

[James Bang 5,000+ posts]

well yea of course flares would be used on both ends. How do you keep the port tube stable on the inside of the box? It just seems like the tube would wiggle around in there if it was long.

brace them w/ some mdf that has the diameter cutout for the pipes and stick them through...

 

[ItalynStylion 10+ year member]

brace them w/ some mdf that has the diameter cutout for the pipes and stick them through...

You're the ****ing man, I dont know why I didnt think of that!

 

[BLD 25 10+ year member]

2" ports are also pretty worthless. You might want to look into something with a larger diameter, maybe 1 4" port.

 

[ItalynStylion 10+ year member]

Well the ports are for a 1 cube box that is housing 2 EU700s (6.5 inch subs)

I was told that 2" ports will be fine but no smaller than that.

 

[BLD 25 10+ year member]

i would probably do 1 3", but those might work for the ed's.

 

[newusername 10+ year member]

Just for interest's sake, it's worth noting that use of a flared port over an identically sized straight port results in a decrease of the port velocity of roughly 50-60%.

 

[ItalynStylion 10+ year member]

Just for interest's sake, it's worth noting that use of a flared port over an identically sized straight port results in a decrease of the port velocity of roughly 50-60%.

In English chief?