Bandpass designs

[Robert 2001 10+ year member]

Ill try to find it thanks for the help will get with u where can 1 find this

 

[duanebro 10+ year member]

m.facebook.com/WinISD?refsrc=http%3A%2F%2Fwww.google.com%2Fm&_rdr

 

[duanebro 10+ year member]

oops, that didn't work. they have a face book page. it is a beta - so there are issues. but it works great. you will need a guide to get you started.

 

[duanebro 10+ year member]

What are the exact models and years on those subs?

 

[brandinooooo 10+ year member]

The cvr's would hit better and lower. I have the perfect ported box design for cvr's. As for the p1's, you should just do ported as well.

 

[duanebro 10+ year member]

cvr's are best ported, at least the new models. (that is what I looked at) could you post your perfect box Brandin?

 

[wenn_du_weinst 10+ year member]

I sure hope you guys that are ''modeling'' are including cabin gain other wise it's much worse then experienced guesses

 

[duanebro 10+ year member]

I sure hope you guys that are ''modeling'' are including cabin gain other wise it's much worse then experienced guesses

I'd like to pm you - but your mail box is full.

If you want SQ. you need to stick to sealed with these subs. That will give you the flattest fr. with cabin gain. For ported these subs won't have the sq of sealed. But they will be much louder. Just my 2 cents.

 

[wenn_du_weinst 10+ year member]

they are gone now

 

[duanebro 10+ year member]

How much space do you have for a box? I don't want to design a box that won't fit!

How big is the sealed box you have now? Just to compare to what I modeled. And did you like it before you blew it up?

Duane

 

[duanebro 10+ year member]

Ok, this is for one P1 @ 150 watts. (I know you will be using 2)

The blue line is sealed response in 1cf. 80hz lp (Low pass crossover)

Green is ported 1.4cf tuned to 27hz (yes this is very low, It makes the FR roll off like a sealed box) 80hz lp

Red is band pass, about 1.3cf. NO lp filter.

I tried to make the boxes roll off to account for cabin gain. At first glance the ported box looks good. But it starts to roll off lower than the cg should start, so it could be "boomy." And unless you listen to music with bass lower than 41hz the band pass is louder. A single sub in the bandpass should be about as loud as 2 sealed. (In theory/on paper)

I'd like anyone with experience to give their opinion please.

Thank you,

Duane

 

[brandinooooo 10+ year member]

This was designed with cabin gain in mind (2001 Chevy Blazer SUV) which was about 52 (If I remember correctly). Somewhat flat response from 30 - 85 (LPF at 85). Not boomy or peaky at any frequency

 

[duanebro 10+ year member]

This was designed with cabin gain in mind (2001 Chevy Blazer SUV) which was about 52 (If I remember correctly). Somewhat flat response from 30 - 85 (LPF at 85). Not boomy or peaky at any frequency

That looks close to what I have with the ported box. You should look into updating WinISD. It is being developed again. I found a link: http://www.linearteam.org/download/winisd-07x.exe

 

[brandinooooo 10+ year member]

I have alpha but it ***** up too much and you can't add your speakers.

 

[RAM_Designs 5,000+ posts]

You can add your own speakers with the Alpha version, I do it all the time. Follow the instructions on what order to enter the t/s and it makes it a lot easier.