Show and tell: converting vintage monkey-coffin into ported sub (stupid)

[filtercoffee]

Hi folks, check out my latest creation.

Goals:

• use the JVC speaker enclosure
• use a walmart 12" subwoofer ($30)
• make it go low and loud

I did a similar sealed build documented here, which went low after EQ but didn't get loud, so I thought I'd fix that by making it ported.

Result:

(photo album)

Impedance sweep:

Ports are 4" drain/sewage pipes from home depot (link)

They're 1m long each, they down into the box till they're behind the woofer.

Thoughts:
While it was fun to build, shakes the whole house, it doesn't sound as good as the sealed sub. I know a couple of issues with it already. I'll let you guys guess based on the pics and impedance sweep down in the replies 🙂

More photos available here: (photo album)

 

[Xoc1]

Good to see someone thinking outside the box.
Maybe you could add some bends to allow you to to tuck the ports around the back or sides?

 

[filtercoffee]

Thanks. Hmm yeah I will try, but the pipes are surprisingly rigid. I may end up rethinking the ports altogether. I wonder if making the port exit location closer to the woofer will make it sound better.