Originally Posted by mike d263
Hey jay i was looking at you PR build. that looks easy enough.
So if i where to do the PR's with the dayton HO12 dvc (the dual voice coil is need to get the peak power from the amp)
what size would i need to make the box?
Is placement of the PR and woofer important?
could i fire the woofer out front and the PR down?
Yes a PR build is simple, there are some considerations you have to make. You need two of the PR's, placed on opposing sides of the cabinet
. With a small, light cabinet, the large excursion from the PR will cause your cabinet to rock and wobble if two arent placed on opposing sides to cancel out the effects. You also should not up/down fire a PR because it will sag, and reduce the amount of excursion available. You can down fire the active driver, or set it up like my build.
With a pair of the CSS APR 12's in each cabinet, here's both 1.5 ft3 and 2 ft3. The PR's require all of the mass they're supplied with (900g) added, so changing cabinet volume tweaks tuning.
The bigger box gets about 3hz lower, but the smaller box is stronger down to 26hz.
With a 20hz high pass filter in place on either of these you actually could handle 1200 watts without bottoming anything. If you do not plan on using a high pass filter do no watch of listen to anything with content below 20hz. This is a requirement for any bass reflex design, a filter is needed below the box tuning point.