Port Noise Question

[Decado 10+ year member]

I'm getting a little bit of port noise (sounds kind of like there's a piece of paper taped on the inside of the port), I have 41.25 inches of port area and it's 21.75 inches long. I was wondering, if i sand down the corner where the port takes the turn and i sand down the end of the port more so that it is flared even more can that reduce port noise somewhat?

Click to read more...

 

[puppie_chow 10+ year member]

Sure.

 

[Decado 10+ year member]

Sure.

Lol, is this sarcastic or serious?

 

[hdave 10+ year member]

im not sure either.

sorry to hear about your port noise though.

if u can crack it open try to get all the edges smooth

 

[Decado 10+ year member]

Can't crack it open, but i may be able to reach the first corner in, cant get the end of the port though //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif . Ohh well, it shouldnt be that much of a problem, I can only hear it when i listen to it with my trunk open, otherwise it's just fine.

 

[negativezeroz 5,000+ posts]

thats pretty loud noise then if you open your trunk and can hear it....my JBL L1 fronts have port noise because that was beofer JBL developed the flared port but I can only hear it if Im right next to the lil port..

 

[Moe Lester 10+ year member]

flaring it more should help you out, go for it.

 

[Decado 10+ year member]

flaring it more should help you out, go for it.

Alright man, thanks. And for future reference (think i may build a new box if i can't get rid of this noise, maybe a lil smaller too so i dont have to pull out the backseat and support bar to get the box in and out) how much port area should I have for a 15 SX?

 

[Moe Lester 10+ year member]

id give 45 minimum with everything flared, but 60+ if possible while still flaring and rounding everything.

 

[Decado 10+ year member]

id give 45 minimum with everything flared, but 60+ if possible while still flaring and rounding everything.

Wow, that's quite a bit, may even defeat the purpose of building a smaller box //content.invisioncic.com/y282845/emoticons/uhoh.gif.c07307dd22ee7e63e22fc8e9c614d1fd.gif , alright man, thanks for the help.

 

[Decado 10+ year member]

How about 50.75? 60 sq inches of port area that calls for 40 inches port length //content.invisioncic.com/y282845/emoticons/uhoh.gif.c07307dd22ee7e63e22fc8e9c614d1fd.gif , even with 50.75 that's still 32 inches //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif . Btw, 32 hz tuning.

Edit: could I do two 4x14.5x20 inch ports?

 

[Moe Lester 10+ year member]

How about 50.75? 60 sq inches of port area that calls for 40 inches port length //content.invisioncic.com/y282845/emoticons/uhoh.gif.c07307dd22ee7e63e22fc8e9c614d1fd.gif , even with 50.75 that's still 32 inches //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif . Btw, 32 hz tuning.
Edit: could I do two 4x14.5x20 inch ports?

no, an increase in the port area is gonna make your required port length go way up. (i.e. 60 sq in vs 50.75 lol) 50.75 sq in 32 long sounds good, flare the ends and round the bend.

 

[Decado 10+ year member]

no, an increase in the port area is gonna make your required port length go way up. (i.e. 60 sq in vs 50.75 lol) 50.75 sq in 32 long sounds good, flare the ends and round the bend.

****, been makin plans for this box and this just isnt going to work out...what i wanted to do on my box is make it about 2 inches shorter, and a few inches less deep, but with this extra port area (even if i do the same port area as b4) the box is just going to have to be bigger to accommodate for the extra internal volume i have to add (I want to do this for one, because the tortion bars of my trunk are bending over the box right now, and because I will be able to get it in and out of my trunk w/o having to remove the backseats and seat support bar). Now i'm thinking I should go with 4 4" round ports, that would be 50.25" of port area. Now in winisd it says for 4 4" round ports the port length would have to be 38.16", does that mean 9.54" a port or 38.16" a port?

 

[Moe Lester 10+ year member]

****, been makin plans for this box and this just isnt going to work out...what i wanted to do on my box is make it about 2 inches shorter, and a few inches less deep, but with this extra port area (even if i do the same port area as b4) the box is just going to have to be bigger to accommodate for the extra internal volume i have to add (I want to do this for one, because the tortion bars of my trunk are bending over the box right now, and because I will be able to get it in and out of my trunk w/o having to remove the backseats and seat support bar). Now i'm thinking I should go with 4 4" round ports, that would be 50.25" of port area. Now in winisd it says for 4 4" round ports the port length would have to be 38.16", does that mean 9.54" a port or 38.16" a port?

all 4 would have to be 38.16.

 

[Decado 10+ year member]

all 4 would have to be 38.16.

Ouch, not good, not good. I guess i'm going to have to have port noise //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif . Does port noise even affect anything other than listening to it with the trunk open anyways?