EMT mixing console

[Aleguitarpro]

A friend of mine bought a vintage console by EMT.

Inputs modules (16ch) are marked A411, master module (4ch) are A112, monitor module are A415 and A414.

It seems to have a problem because the outputs in each selected option will always works only one channel on two (R channel), taking stereo output from "monitor" module A415.
(The other monitor module A414 has a Tuchel connector and A415 has normal XLR marked as L and R).

I recently restored and racked some channels of a studer 169 and for the few experience of these mixers I realized that the channels in the bus are always assigned in pairs mono even in groups.
So to have a stereo out L-R in monitor module A415 (taken from the input modules A411) I think I have to select Group 1-2 to have it routed to the first couple of "master" modules A112 and the second couple of master modules are assigned with Group 3-4 switch but it don't work...
Also mono inputs panned in "center" works only from R channel.
I haven't any schematics of them or manual so if someone could help me with material or suggestions would be welcomed!

I haven't found nothing relevant in the web (schematics, manuals, descriptions) and these console seems to be very rare...
There is only a discussion here in which I found scheme of A112.

Thanks!

 

[Rogy]

Hello,

Yes, those EMT's are rare but very nice sounding! I own two EMT MM450's.

I have all the schematics (lots of A3 pages), will try to find a scanner...

Yours seems to be a custom version; normally there are four groups and four sums (all of them are mono; you use two of them for stereo). Your version has just the four sums.

Normally, to listen to a sum, you would select the ∑1-2 or ∑3-4 button on the A414 module (above the MONO, L-R REV and PHASE button and below the PFL button).

To use a pair of input channels for stereo, you either route both of them to sum 1 and sum 2 and pan the first left and the second right, and make sure the pan rotaries are not pulled up, as this defeats the panning. Or you send the first channel to sum 1 only and the second channel to sum 2 only.

It looks from the pic that only three A112 summing modules are installed. On each of those modules you can select if they sum the odd or the even channels, by setting a jumper on the PCB.

I hope this makes sense.

Let me know if you need a fourth summing module A112, I have some spare modules left.

All the best,

Rogy

 

[Aleguitarpro]

Thank you for your answer!
Nice to hear that you have this model that seems to be quite rare.
I found only a lot of A100 models but not this one (EMT multioutput Mix system 40)

I think this mixer has been modded and modules have been randomly assembled.
So yes, one A112 is missing.
In the "frame" and in the pcb there isn't space for the "Group" modules: with 14 inputs there are only 5 empty slots for "output/routing" modules and then there is talkback and A414 and A415.
The only thing I see in the main pcb of the frame is a sort of separation between the connections for the input modules and the outputs/monitoring (sum, group, monitor, talkback) but I cannot understand where the group module should go.

Also I don't know what is the code and how the modules that handle groups are… I can use more A112 for the groups?

I understand in these days that 2 of the 3 A112 modules doesn't work.
Surely with the schematics I can fix almost 1 of 2 to have one working L-R outputs.

Also 8 of 14 input channels are not working. Some of them has been pillaged during the years to fix other channels so it will be an hard work!

If you can scan A3 pages into 2 A4 format it's ok instead of scan them with a A3 scanner!
Then I print them and put them together.
I'd like to have schematics of A411 and A112.
A415 and A414 seems to work perfectly.

If you have some spares A112 would be great!
Thanks!