i got some mdf wood and im about to make some speaker rings for my fiberglass setup, i have a dremel right now, is there an attachment that will cut it good? the wood is like 3/8 so i figured i'd double them up, but anyways just looking to see what cuts best. i dont have a jig saw or anything special just a dremel at this time

maybe this? http://www.dremel.com/html/owners_club/index_fr.html ok nevermind i found it. its #561 Multipurpose Cutter

bandsaw.

along with a cutting bit, i belive that dremel offers a router kit. that would be your best bet, as you would get very accurate and perfectly round cuts. go to home depot/lowes/whatever and check it out, im 95% sure on this one.

awesome. i just watched pimp my ride and they were making speaker rings or some shit and i figured it was some bit they used. thanks for the help!

roto zip imo

cuts circles really quick

ok i got my stuff to make the rings, now what im going to do is make speaker rings above the speaker so it sets in the box and not out. what my qusetion is, is how big of a ring do i need for the outside of the speaker, i guess you would call it like a doughnut? and also should i put a circular piece of wood in where the speaker is to keep the fabric tight when i put resin on it? if your confused ill try and make a picture or something

heres how you do it:

1) find the dimentions for the cutout diameter and overall speaker diameter.

2) add an inch or so to the "overall" diameter. if its a 12" speaker, the inside cutout will be 11", the outised diameter will be 12", and the added inch will make 13".

3) make two rings. both will have outside dimentions of 13", but one will have an inner diameter of 11" (this one will hold the speaker), and the other will have an inside diamteter of 12" (this will surround the speaker).

4) for the surround ring, save the inner scrap piece.

5) round off the edges of the surround (13/12) ring. this will prevent the cloth from being torn, and will make the finished product smoother.

6) center and clamp both rings together and secure them with wood glue and recessed wood screws to form a bond. lay the center scrap piece in place. invert the sub and drill mounting holes for the speaker through the scrap piece and the 13/11 ring that will hold the speaker. put a dark tic mark so you can line the pieces up later.

7) cover the center scrap piece with aluminium foil.

8) after positioning the rings where you want them, stretch the cloth over the combined ring pieces. then take the scrap center piece and "stuff" it into the center cutout. if you can make out the tic mark, this should help you line up the screw holes. if not, you should have a good idea of how it fits based on how you positioned the ring. you only need to but 2-3 screws in. secure the scrap piece into place, and then glass over it all.

9) after a couple layers, remove the center scrap piece. you can now see the main form. continue glassing like normal.

as a side note, you will be filling the inside diameter where the "donught" where the speaker will drop into place. it might be a good idea to leave a 1/4" extra opening (i.e., 13.25" outside dimention, 12.25" inside dimention). that will give you enough room for a bit of bondo, fiberglass seepage, and covering material.

edit: i got a little carried away with my number keys, lol. i dont recommend making a 113" diameter cutout, or installing a 122" sub :P finger spasms.

Rotozip rocks...my newest woodworking toy

Terry

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sweet!

i just got a bit for my dremel and made the rings. now i have to find some fiberglass matting. thanks for the assistance