Thiele box dimensions and photos, please

[Jaroslav]

Hi all,
these boxes are almost impossible to get here, but I can maybe get some used EVM12Ls. I would like to build an exact copy - and therefore I am asking for pictures of the opened box and inner dimensions of the bassreflex port, its placement, etc. Thanks in advance!

 

[Russ]

I would find this info useful as well....

 

[MetalMatt]

Me too!!!

 

[hans-jürgen]

If everything else fails, I could take the measures of my self-built one...

On that old picture it doesn't have the necessary bass reflex hole on the front though, because at that time it was an open back cab.


Here's the EVM-12L Engineering Data Sheet / EDS file from Electro-Voice with the necessary Thiele specs:

http://www.srl.utu.fi/~tke/MesaBoogie/Loudspeaker/evm12L-eds.pdf

In that file they mention another EV document for exact cab dimensions:

Details on vented box design, construction and equalization may be obtained from Electro-Voice by requesting “TL806 Builders Plans”(Form 1544-523).

Googling for that did not come up with a download URL yet, but it was once available from Electro-Voice themselves.

Tadaa...

http://archives.telex.com/archives/EV/Builders%20Plans/

This site seems to be the official archive for discontinued products from Electro-Voice and affiliated manufacturers, so you can also download all EDS files for different EVM 12" versions there:

http://archives.telex.com/archives/EV/Speakers/EDS/

Furthermore they also provide DIY, owners and service manuals:

http://archives.telex.com/archives/EV/Speakers/

 

[Jaroslav]

Hans-Jürgen, thanks a lot! From what I have seen it looks as Mesa Boogie took the TL806 and made some cosmetical changes. Great! Now I have to try to find some EVM12Ls