Originally Posted by BDP24
Smitty---My kits (same as yours, two DS1510's) came with sheets of polyfill rather that loose material. I haven't unfolded the fill yet (my boxes are getting cut tomorrow, on a CNC machine) so I don't know if it's one big sheet or two smaller ones. Brian recommends lining the outer walls of the enclosure only, so do one layer of fill and give the sub a listen. If it sounds like you think it should, leave well enough alone. Or, you could take the drivers out and put in a second layer (assuming there is enough material left to do so) and see if it's better. A PITA, so hopefully you can get an answer from Brian soon. Congratulations on your new State of the Art Subs!
I no more than posted the question and found/read on the Rythmik site that Brian recommends less "fill" than most due to the servo design. Initially, all the recommendations elsewhere stating approximated one pound fill per cubic foot of box had me wondering.
. The kits did come with the sheet of fill. It's about one inch thick and probably enough to make the recommended one layer on all sides - will stick with that as you commented.
Congrats on your kits - and the CNC job on the boxes. I'm sure that will make for a perfect and beautiful pair. I'll admit I was a tad hesitant to attack two and a half sheets of MDF with a skill saw, table saw, router, drill and jig. My father, in his upper 70s, near deaf, yet still very capable physically was a huge help and was totally interested and excited to assist. He had no idea what a dedicated subwoofer was but thought the Rythmik amp and drivers were "things of beauty".
We managed to get everything cut within a 32nd of an inch tolerance. The only cuts I didn't worry much about we're the 6 and 7 inch diameter circles/cutouts on the internal bracing - those were quick work with the jigsaw...
Are you performing the "assembly"? What size of box - did you utilize one of the Rythmik plans? -(You may have already mentioned the info in previous pages).
I've seen and heard two F15HPs in person a year ago yet my boxes look huge in comparison even though only larger by a couple of inches...
. I've taken pictures along the way and may post later this week. I'm enjoying the hell out of this build!