Speaker enclosure dimensions – oops

Folded - Oops

The pipe with the new 53mm straight lengths comes a little short of the planned box enclosure end……

I’d calculated the ‘missing’ 57.5mm length based upon the centre path of the diameter  having a diameter of 95mm……

The pipe itself has a diameter of 85mm

So, the actual pipe itself will need an additional 42.5mm either side of the path it follows………..

Which means, a new sketch………Something like this.

 

folded6

  • R47.5 is the 95mm diameter of the centre of the pipe
  • R90 is the outer diameter of the 85mm diameter pipe
  • 10 is the thickness of the speaker enclosure

Finally, we have at least one outer enclosure dimension sorted! – 200mm – Err, that’s a bit bigger than planned! – The speaker itself is only 98.2mm diameter……Looks like some more iterating needed, BUT, now I understand the dimensions, I can experiment a little with the Tube’s cross sectional area and therfore diameter…….

In hindsight, the speaker enclosure dimension was fairly obvious…….

  • enclosure thickness ( 10mm ) +
  • Transmission Line Diameter ( 85mm ) +
  • enclosure thickness ( 10mm ) +
  • Transmission Line Diameter ( 85mm ) +
  • enclosure thickness ( 10mm ) +

= 200mm!

The smallest enclosure possible has a Transmission Line area the same as the speaker – i.e.

  • SD of 28.3 gives a Diameter of 6cm….
  • 10mm + 60mm + 10mm + 60mm + 10mm

Smallest possible size = 150mm

More fun to follow………..

Lets look

 

Author: bleughbleugh

Early Fourties, Wife, two kids in primary school. Both of us work full time...3 years now Back in Blighty after a decade away...It's a new country for everyone! Still finding time to tinker!

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s