Making circle cutouts for subs?

[Super98 10+ year member]

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.

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[swaptrex 10+ year member]

you must have something in your garage thats 12 inches in diameter, thats what i used.

 

[Super98 10+ year member]

I need a 16" cutout.

 

[bigjus 10+ year member]

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 10+ year member]

I need a 16" cutout.

What size sub are you running?

 

[Ray21 10+ year member]

Compass works just fine for me...

 

[theCybe 5,000+ posts]

Router + Jig.

 

[swimfreak26 10+ year member]

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 10+ year member]

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 10+ year member]

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 10+ year member]

I used my router to make all my cut outs for my 'glassed box.

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

 

[nosaj070 10+ year member]

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 10+ year member]

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 10+ year member]

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 10+ year member]

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