Evaluate My Box Design!

[AceAnderson]

Alright guys, yes it's 5AM! I've been slaving away over this all night, and I'll be building it tomorrow. Can you guys look this over for me and make sure there's nothing I've missed? Any minor design flaws I skipped over?

Box specs

18H x 36W x 22D

6.75 Cu Ft.

16.5H x 5W Port Opening - 22.75in long

Tuned to 33hz

Any reason I shouldn't make this box?View attachment 26554185View attachment 26554187View attachment 26554186

Click to read more...

 

[The_Dealer]

You didn't mentionwhat sub(s) and amp your running. That'll help us help you better.

Sent from my G870a on 38's

 

[AceAnderson]

Wow, I didn't!. It was late, oops. They're Kicker L5's, BRZ 2400 watt amp.

 

[cfox10 10+ year member]

Wow, I didn't!. It was late, oops. They're Kicker L5's, BRZ 2400 watt amp.

10's, 12's, 15's?

 

[Jeffdachef 5,000+ posts]

Alright guys, yes it's 5AM! I've been slaving away over this all night, and I'll be building it tomorrow. Can you guys look this over for me and make sure there's nothing I've missed? Any minor design flaws I skipped over?
Box specs

18H x 36W x 22D

6.75 Cu Ft.

16.5H x 5W Port Opening - 22.75in long

Tuned to 33hz

Any reason I shouldn't make this box?View attachment 26554185View attachment 26554187View attachment 26554186

Your tuning and airspace claims are a bit off but those subs will work fine with 35-36hz tuning

I'm guessing these are 12s with only 5.3 cubes of usuable airspace.

 

[AceAnderson]

Where is that calc? I'm not OK with 5.3 cubes at 36hz, I wanted 6.5 cubes at 33hz. Thank you for pointing this out I was literally about to go buy the materials. I'm going to redesign that box.

How big would the box have to be for 6.5 usable cubes?

Yes, the L5s are 12"s

 

[Jeffdachef 5,000+ posts]

Where is that calc? I'm not OK with 5.3 cubes at 36hz, I wanted 6.5 cubes at 33hz. Thank you for pointing this out I was literally about to go buy the materials. I'm going to redesign that box.
How big would the box have to be for 6.5 usable cubes?

Yes, the L5s are 12"s

Torres' Box Tuning Calculator - Updated 8/18 - Subwoofers / Enclosures - SMD Forum

Let me guess, you used the 12 volt port calculator huh. Its basically garbage if you dont know the difference between NET cubic feet and GROSS cubic feet. Port takes up space which will make the available airspace of the box smaller which will also require the port to be longer if you want to keep the same tuning which will in turn make the box even smaller and then port has to be longer and it goes around in a loop like that. Torres Box Calc gets rid of that headache.

 

[AceAnderson]

Yeah I calc'd by using the formulas and forgot a step. That will help. ***** now I gotta redesign it lol