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View Full Version : Making circle cutouts for subs?



Super98
03-21-2005, 06:44 PM
What do you guys use? I have a couple of subs w/ no templates, and any compass I see being sold around here make small circles. A neighbor told me to draw lines from the center and connect the ends to form a circle, but I figure maybe there's a better way. Thanks.

swaptrex
03-21-2005, 06:47 PM
you must have something in your garage thats 12 inches in diameter, thats what i used.

Super98
03-21-2005, 06:53 PM
I need a 16" cutout.

bigjus
03-21-2005, 07:23 PM
not sure if i totally understand, why not just take a piece of string with pen on it 8" long, screw it in the center and move it in a circle?

ANeonRider
03-21-2005, 07:25 PM
I need a 16" cutout.

What size sub are you running?

Ray21
03-21-2005, 07:49 PM
Compass works just fine for me...

theCybe
03-21-2005, 09:15 PM
Router + Jig.

swimfreak26
03-21-2005, 09:17 PM
I use a ruler, drill two holes the radius of your circle apart. Now, put a nail in one hole and trace the perimiter by putting a pencil into the other hole and making a circle.

Make sure you have REALLY small holes though so that the measurement is accurate.

joeldirt
03-21-2005, 10:05 PM
I showed a method of cutting your holes out in this forum. check it out. you may be able to use it for your own

Super98
03-21-2005, 11:09 PM
Ok thanks. I'm getting an 18" avalanche and the cutout is 16-17" in diameter. I'll search for that post too Joedirt. I checked out an art store and they wanted $70 for a compass w/ an extension that can cover a circle that size. Shiiiiyat, they must be crazy.

jrz126
03-21-2005, 11:16 PM
I used my router to make all my cut outs for my 'glassed box.
http://memimage.cardomain.net/member_images/3/web/435000-435999/435572_72.jpg
I made up a little jig here. Then after making some measurments and a few test cuts, i got it to the right dimensions. I made multiple passes on it as well. It took a bit more time, but it came out perfect
http://memimage.cardomain.net/member_images/3/web/435000-435999/435572_74.jpg

nosaj070
03-21-2005, 11:20 PM
Use a router and a circle cutting tool. Takes a bit of time due to my crappy router, but comes out with a perfect circle.

seth350
03-21-2005, 11:23 PM
not sure if i totally understand, why not just take a piece of string with pen on it 8" long, screw it in the center and move it in a circle?

You know what.........


I never thought of that.....................

joeldirt
03-21-2005, 11:59 PM
JRZ126...... That is exactly what I am talking about in the thread I started on circle jigs. Mine looks alot like jasper200. But they do the exact same thing, good job and thanks for the reinforcement.............

I wish you would have tucked the carpet inside the sub holes so you dont see the MDF rings

jrz126
03-22-2005, 12:08 AM
I wish you would have tucked the carpet inside the sub holes so you dont see the MDF rings


Yeah I kinda cut the outter rings alittle too small so there wasnt much room for the subs, let alone some carpet. I just half assed the carpet on there anyways. If I find time to do it again, I'll throw some black paint on those rings so they dont stick out like a sore thumb

Super98
03-22-2005, 08:38 PM
Well, what I did was draw radius lines from the center and connected the dots. Took 5 minutes and wasn't all that bad.