Look My Design Over! For my friends Mustang. 2 12" JL's

[SicAudio 5,000+ posts]

really OS then lucky for him lol

they will be decently loud but not alot of bottom end.

 

[Try2makeitwork 10+ year member]

Awesome, well thanks for checking it out. Ill post some pics when I'm done!

SicAudio; Thanks for the 2nd opinion, that was cool.

Gonna start cutting in the A.M.

 

[RAM_Designs 5,000+ posts]

Sounds like the W1V2(I think) from the way you described the cone.

 

[SicAudio 5,000+ posts]

Awesome, well thanks for checking it out. Ill post some pics when I'm done!SicAudio; Thanks for the 2nd opinion, that was cool.

Gonna start cutting in the A.M.

np man.. gl with the it let us know how it works.

and yes it does sound more like a W1 than a W3 or O

 

[Try2makeitwork 10+ year member]

Thanks, ill let you all know how it ends up sounding....

 

[SicAudio 5,000+ posts]

ruh roh shraggy!!!

the L part of your port looks waaaaay to close to the back wall...

it has to be the same distance from the wall as it is wide at the front...

 

[Try2makeitwork 10+ year member]

well thats the way it is in the plans. a 2" port that goes back and splits against the back wall 1" away on each side, the subs each share half of the port area.

Thats IMO ^

 

[RAM_Designs 5,000+ posts]

ruh roh shraggy!!!
the L part of your port looks waaaaay to close to the back wall...

it has to be the same distance from the wall as it is wide at the front...

When the port splits at the back of the box, each side needs to be half of the original port width.

 

[RAM_Designs 5,000+ posts]

The box and port area are both too small for a pair of ported 12's anyways...hopefully he isn't disappointed by the results.

 

[Try2makeitwork 10+ year member]

Thats what it does. Its only off 2 of 4 channels on a 1200W amp. there single 4 ohm, so i was going to series them up. 4+4=8/2 4ohm load bridged...

 

[SicAudio 5,000+ posts]

When the port splits at the back of the box, each side needs to be half of the original port width.

uh... no? it has ill effects on the tuning... been there done that and used to think the same thing then got reamed by a ton of people on here that charge for their designs for "misinforming" people and they posted all kinds of evidence to the contrary...

if it is accounted for then yes you can do it ...

 

[RAM_Designs 5,000+ posts]

Thats what it does. Its only off 2 of 4 channels on a 1200W amp. there single 4 ohm, so i was going to series them up. 4+4=8/2 4ohm load bridged...

What amp are you using exactly? Those subs wired together will give you either a 2ohm or 8ohm load, so you'll have to use the 8ohm option(series) with your 4 channel, as I highly doubt it's stable at 2ohms bridged.

 

[RAM_Designs 5,000+ posts]

uh... no? it has ill effects on the tuning... been there done that and used to think the same thing then got reamed by a ton of people on here that charge for their designs for "misinforming" people and they posted all kinds of evidence to the contrary..

It's common knowledge that you split the port into two ports that equal the same port area as the original single port...otherwise you're dealing with different amounts of port area at different parts of the box(in your instance, twice the port area once you split the port). Now what does happen is that you will need a slightly longer port to make up for the fact that you're splitting it into two smaller ports. How much longer just depends on a few things like port size, tuning, and how long the ports need to be after the main one splits.

I'm interested to see who said differently, as I have never once heard of anyone promoting what you're speaking of.

 

[SicAudio 5,000+ posts]

It's common knowledge that you split the port into two ports that equal the same port area as the original single port...otherwise you're dealing with different amounts of port area at different parts of the box(in your instance, twice the port area once you split the port). Now what does happen is that you will need a slightly longer port to make up for the fact that you're splitting it into two smaller ports. How much longer just depends on a few things like port size, tuning, and how long the ports need to be after the main one splits.
I'm interested to see who said differently, as I have never once heard of anyone promoting what you're speaking of.

if the port is 2" wide at the front it has to stay at 2" wide at the back

you account for it by calculating both L portions in the length...

the way you are saying to do it would be like putting a y pipe on a 4" round port and splitting it into 2 2" parts... it does not work...

reducing the port width like that creates all kinds of air movement problems and the tuning you think you have just changed by alot...

 

[RAM_Designs 5,000+ posts]

if the port is 2" wide at the front it has to stay at 2" wide at the back
you account for it by calculating both L portions in the length...

the way you are saying to do it would be like putting a y pipe on a 4" round port and splitting it into 2 2" parts... it does not work...

reducing the port width like that creates all kinds of air movement problems and the tuning you think you have just changed by alot...

That's not what I'm saying at all because two 2" pipes do not equal the same cross-sectional area as a single 4" pipe. But dividing the 12"x2" port into two 12"x1" ports will give you the same cross-sectional area. I wouldn't recommend a port as skinny as what the OP is using, but it's just an example.