[ryno]

In a small room, sitting against the back wall, the WR125 in a ported box was to boomy. A sealed box of 0.375ft3 is much better, but a little more low end would be great.  A previous thread mentioned a dayton 8inch passive radiator in a 0.5ft3 box would be -3db at 45hz, so I bought a couple.
I've never used a radiator before, is it OK to mount it on either the front or back of the box?  Any opinions on box size other than the 0.5ft3? There's a place to add mass to the radiator,  How do you tune it?
Thanks, Ryan

[Voodoo Rufus]

PRs can be mounted front or back, I don't think it matters. You tune the radiator by adding washers typically to the threaded rod.

Using Winisd:
.5 ft^3 would work with no added mass decently, -3 at 60Hz, 17ms group delay.
Going smaller just gives a larger bass bump.
Going larger flattens the response, with no good affects by adding mass.

.5 with no more mass seems to be as good as you're going to get.

[ryno]

Thanks for the response voodoo. I hadn't recieved any responses so I went ahead and built the 0.5ft3 boxes with the pr's in the rear. I think this is a great box for my room, not boomy when I'm against the back wall like the ported, and more bass than the sealed. Now I need to transfer over the tweeters and put a finish on the boxes.
Ryan

[Voodoo Rufus]

Glad to hear it, and sorry I didn't post sooner.

I'm finishing my own pair of 7L sealed boxes for FR125s I ordered from Kevin as well.