Form Tube Port help

[BoomBoxStereo 10+ year member]

so after work today i am going to pick up some 8" diameter form tube for a port. box is made of .75" birch. what is the best way to go about mounting this port to my box?

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[RangerDangerV2 5,000+ posts]

so after work today i am going to pick up some 8" diameter form tube for a port. box is made of .75" birch. what is the best way to go about mounting this port to my box?

just make the port out of wood... like this

 

[bubbagumper6 5,000+ posts]

just make the port out of wood... like this

lol, that is ridiculous...

 

[RangerDangerV2 5,000+ posts]

lol, that is ridiculous...

takes less than an hour to make... lol

 

[SounDrive Pro Seller]

just make the port out of wood... like this

And may I ask what the hell you did with all the inner MDF circles? Lol

 

[RangerDangerV2 5,000+ posts]

And may I ask what the hell you did with all the inner MDF circles? Lol

i use them to mix body filler on, then the rest I give to my mom, she makes tables and stuff out of them lol

 

[dB-SPL 10+ year member]

Those MDF ports gotta be heavy as fawk.. lol As for mounting the form tube, I used 2 pieces of MDF squares ust over the size of the tube. Then cut circles in each piece just big enough for the tube to fit inside. screwed/glued the MDF squares together and layed them flat on the ground and dropped the tube in and loaded it with gorilla glue and put a brick on top of the tube to hold it still while it dried. Now you can just screw the MDF squares to the inside of the box and use a flush-trim bit on a router and get the perfect circle by going around it after you've mounted it. Then a nice round-over bit to flare it.