That 12" Dayton PR has an xmax of 10mm. I've always heard you want the volume the PR moves to be 150% - 200% what the driver moves so you'd need at least two. After that, it basically acts like a ported enclosure which means if you were hitting overexcursion in a 8 cubic foot ported box, you will also hit overexcursion in an 8 cubic foot PR box.
Off the cuff I'd say once tuned it would sound okay. I will plug the numbers into Unibox when I get home to verify. One thing you will want to verify is whether it is best for you to have a $25 active driver with $45 in pasive radiators or just find a $70ish driver you like.So If I got two of those, get the enclosure size down to day, 4 c.u. ft, How well should/would it perform do you reckon?
Instead of using a column of air as a "spring", a PR uses a column of air's equivalent mass. Each PR will have a bolt that you can remove and add washers until it is the proper weight. It is actually very easy. For tuning you just install the PR's backwards so you can easily get to the washer bolts. When you get them set right, just flip the PR's around and re-install.Well I already have the $25 driver, so I guess I'll have to work with what I have. And I always like to try new things and experiment. So, PR's do that job.
18*18*45 box, with the two PR's on the sides of the ED sub.
** Wait, you said 'tune' the PR's? How does that work?
I don't know. To be honest, I always just use Unibox and let the computer crunch the numbers. Without seeing your work the only thing I can suggest is that you double check that all your units match up (esp. for the density of air).See my edit, I keep on getting some insanely large numbers.
Well, according to the spec sheet the stock mass is 200 grams and the maximum moving mass is 500 grams (total, I assume). So, if the tune you are trying for requires 1307 grams then you may need three PR's, buy a 15" Dayton DVC PR or a TC-Sounds PR or change the tune of the sub.Well, I did it for just one PR (instead of two) and came up with 1307 grams, which is like 2.88 lbs. That has to be way too much, I mean, they sample driver they used was like 280 grams, which is less than a pound.
Can it support ~ 3 lbs on the bolt?