First box 2 sq hds12's

[furbee86 10+ year member]

I want to build my own box. Never built one. But here it goes. Have 2 sq hds12's powered by a ED nine 1 in dodge avenger. Max specs for trunk are 36w 14.25 h and depth is negotiable up to around 45. All outer measurements. Ported. All i listen to is rap. I want to feel the bass. Current box from prev subs is h 14.25 w 35.5 d 17.25 all outer measurements.. And to be honest it doesnt have the deep feeling bass im looking for.. Any imput is appreciated

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[CSCStang]

Current box is only 3.95 gross cubes, way too small for 212's. You need 5 net cubes tuned to 35hz. 36x26.5x14.25. 73 sqin and 14.53" port per cube.

 

[furbee86 10+ year member]

Thanks for the help. I really have no experience with boxes. Have always had them built for me. Just seeing the costbof a box with shipping has me thinking it may be worth a try. I get the dimensions but creating the port has me scratching my head

 

[Jeffdachef 5,000+ posts]

Thanks for the help. I really have no experience with boxes. Have always had them built for me. Just seeing the costbof a box with shipping has me thinking it may be worth a try. I get the dimensions but creating the port has me scratching my head

Use a round port and you can adjust tuning easily.

 

[Jeffdachef 5,000+ posts]

Thanks for the help. I really have no experience with boxes. Have always had them built for me. Just seeing the costbof a box with shipping has me thinking it may be worth a try. I get the dimensions but creating the port has me scratching my head

Follow this design just like it says. Attach the port in the center between the subs. You basically just make a square box, cut 3 holes, two for subs one for port and glue on the port to the box. Try with low tuning first and start chopping the port shorter inch by inch until you get the sound you want. Use threaded rods or wooden dowels to brace the box. when it says number of extra baffles 1, it means have an extra front side cut and glue them together so it can support the subs properly. Use Birch ply or 7 layer or higher plywood. MDF will be heavy.

Buy this Take a tape measure and try to get as close as you can to 8 inches in inner diameter because they all vary in size.

Shop QUIKRETE 48-in Concrete Tube Form (Common: 8-in; Actual: 7.5-in) at Lowes.com

 

[furbee86 10+ year member]

And would that port be internal or attached outside lol

 

[DaytonLax14 10+ year member]

Internal.

 

---------- Post added at 01:59 PM ---------- Previous post was at 01:59 PM ----------

 

Could go external but you won't need to

 

[furbee86 10+ year member]

Follow this design just like it says. Attach the port in the center between the subs. You basically just make a square box, cut 3 holes, two for subs one for port and glue on the port to the box. Try with low tuning first and start chopping the port shorter inch by inch until you get the sound you want. Use threaded rods or wooden dowels to brace the box. when it says number of extra baffles 1, it means have an extra front side cut and glue them together so it can support the subs properly. Use Birch ply or 7 layer or higher plywood. MDF will be heavy.
Buy this Take a tape measure and try to get as close as you can to 8 inches in inner diameter because they all vary in size.

Shop QUIKRETE 48-in Concrete Tube Form (Common: 8-in; Actual: 7.5-in) at Lowes.com

Would i be better to use pvc? That way flared would be possible.

 

[furbee86 10+ year member]

Would i be better using pvc for aero port?

 

[Jeffdachef 5,000+ posts]

Would i be better to use pvc? That way flared would be possible.

With an 8 inch diameter port, You have plenty of port area to never see port noise. Flare is needed when you have low amounts of port area which is causing port noise. Aka if you used a 6 inch port instead of 8 is when you'd want the flare. Plus 8 inch pvc is a lot more expensive than sonotubes.

 

[furbee86 10+ year member]

With an 8 inch diameter port, You have plenty of port area to never see port noise. Flare is needed when you have low amounts of port area which is causing port noise. Aka if you used a 6 inch port instead of 8 is when you'd want the flare. Plus 8 inch pvc is a lot more expensive than sonotubes.

Ya i looked and im not payin that much for plastic lol. If u say it'll work ill trust u. Been playin around with torres. Would i b ok to increase the height just a little for sturdiness

Sent from my Trio AXS 4G using Tapatalk

 

[Jeffdachef 5,000+ posts]

Ya i looked and im not payin that much for plastic lol. If u say it'll work ill trust u. Been playin around with torres. Would i b ok to increase the height just a little for sturdiness
Sent from my Trio AXS 4G using Tapatalk

Sure go ahead, your tuning will be lowered a bit with the airspace increase

 

[furbee86 10+ year member]

So puing my shopping list together. So far: circular saw,jig saw tube jeff recommended for port, wood glue and screws and sandpaper. Any other basic thing i may be forgetting?

 

[furbee86 10+ year member]

Well i finally got my circ saw and other stuff needed to try making my box.. Even followed guides online and well its alot harder than i expected. Today was cut day and it didnt go so pretty. Im still gonna finish making it. But she aint gonna be pretty. What i thought were straight cuts were off.. Not sure how its gonna affect sound but at this point i started this ***** and im finishing. I can only try and brainstorm how im gonna get my sub cutouts and port to go.. Pics over the weekend. If im not to ashamed

 

[AnthonyO 10+ year member]

Well i finally got my circ saw and other stuff needed to try making my box.. Even followed guides online and well its alot harder than i expected. Today was cut day and it didnt go so pretty. Im still gonna finish making it. But she aint gonna be pretty. What i thought were straight cuts were off.. Not sure how its gonna affect sound but at this point i started this ***** and im finishing. I can only try and brainstorm how im gonna get my sub cutouts and port to go.. Pics over the weekend. If im not to ashamed

No reason to be ashamed...we all started somewhere...Hell I remember using a belt sander to sand off the uneven edges back in the day...lol