box for zv3 with warden softparts

[conor_thompson 10+ year member]

And as for displacements I'm not really sure, I built my box big for a tiny massive cw12 and now I need to rebuild it, Accounting for a double baffle, I have 4cf. How much displacement should I account for the port, sub, and bracing? I was thinking .35 but then after thinking about it I'm assuming it would be higher?

 

[conor_thompson 10+ year member]

And it's a 12 btw

 

[adulbrich 5,000+ posts]

how can you just use tape?

Yea, probably. I don't see why duct-tape wouldn't work unless it would stretch/flex too much and not do anything.

Holy cow lol I went away for a couple hours and this thread blew up! Anyways, I could make an inch or two come out of the box if that would help it any? I'm putting a bunch of circle cutouts together, and gonna fiberglass them so i can make the flare as little or big as I should

External aeroports are fine. That's what I've done in the past.

And as for displacements I'm not really sure, I built my box big for a tiny massive cw12 and now I need to rebuild it, Accounting for a double baffle, I have 4cf. How much displacement should I account for the port, sub, and bracing? I was thinking .35 but then after thinking about it I'm assuming it would be higher?

If you do an external port, it will have no displacement.

 

[conor_thompson 10+ year member]

Well I mean have 20 inches in the box, and then 2 extra inches or w.e if it would help my port area

 

[adulbrich 5,000+ posts]

Well I mean have 20 inches in the box, and then 2 extra inches or w.e if it would help my port area

Port area is how big your port's opening is. Extra length will not affect that at all.

 

[conor_thompson 10+ year member]

I see now, so I'm pretty much limited in the amount of port area I can have because of my dimensions and tuning goals?

 

[hispls 5,000+ posts]

so out of curiosity i always see people say you "must be flared"... why is this? i have done alot of builds and not flared it. I know plenty of other poeple and competitors dont flare thier round ports all the time. I have flared my ports in the last 4 builds ive done and they still did great. I even tested 2 of 4 builds flare vs not before i sold them and the only real difference i seen was like 1 10th on the meter. All of my dimensions specs and tuning were still spot on with the aeroport calc's
Im not saying its not "the right way", i just dont understand the whole must be flared.

This is generally because people are trying to use too little port area in too small of a volume and port turbulence will become more of an issue.

 

[adulbrich 5,000+ posts]

The bigger the pipe, the more expensive it is too. It's all about the size of your driver and port area to cube ratio. T/S parameters also come into play. Do you want a narrow bandwidth that's really loud or a wide flat response?

 

[conor_thompson 10+ year member]

The bigger the pipe, the more expensive it is too. It's all about the size of your driver and port area to cube ratio. T/S parameters also come into play. Do you want a narrow bandwidth that's really loud or a wide flat response?

Basically I want to play from 27-38 with authority. Is that a narrow bandwidth lol? And is there a way to get my t/s parameters even though its rebuilt with different soft parts

 

[adulbrich 5,000+ posts]

Basically I want to play from 27-38 with authority. Is that a narrow bandwidth lol? And is there a way to get my t/s parameters even though its rebuilt with different soft parts

This is cool. I'm thinking about getting it to test my custom N3's

Dayton Audio DATS V2 Audio Test System

 

[conor_thompson 10+ year member]

Yeah I've been spending WAY too much money between car audio, school, and the dentist lol send it to me to test it out for you if you decide to get it //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[bgowdy 5,000+ posts]

The dimensions will have him at 7.8 por per cube and tge subs excursion is on the high side. Good chance of port noise without a flare.

yea i didnt really take that into account.

 

[bgowdy 5,000+ posts]

This is generally because people are trying to use too little port area in too small of a volume and port turbulence will become more of an issue.

i see.... i think im pretty good, mines 7.5" port and have like 10.77 per cube and box is 4.1 cubes

 

[Jeffdachef 5,000+ posts]

Basically I want to play from 27-38 with authority. Is that a narrow bandwidth lol? And is there a way to get my t/s parameters even though its rebuilt with different soft parts

Unless you have a tester for TSP, then no, you are just gonna eyeball and experiment. That is a very narrow range, I'm pretty sure you are gonna get more response up to 50hz at least up top. To narrow the range, you will want a bigger box more port area and tuned around 28hz. However its not possible with your box specs so you will have to deal with extra bandwidth and use a low pass filter to filter out the freqs you dont like.

 

[hispls 5,000+ posts]

Basically I want to play from 27-38

Actual music doesn't even begin below 40hz unless you're listening to pipe organ.