[quote author="nrgrecording"]Hi.
What about this idea of removing the mic preamp section:
http://www.nrgrecording.de/tempfolder/behringer_ADA_no_preamp.pdf
I changed some things in my little behringer mixer and i like the idea of removing smd resistors to make new connections.. at least for me... it works. And the mixer is working since month... without problems... :wink: ahem... whats that smell?... smoke! :green: :roll:
The idea is to remove the 10k series resistors of the line input, so you can connect two wires here (inverting and non inverting signal). The next connection to the following opamp (TL074) are for example the 825ohm resistors. (looks like an emitter-resistor). So when they're removed we have the point to connect the line input to the opamp...
For disconnecting the micpreamp section from the opamp it should be better to remove some parts... (see the red crosses)
So the mic input isn't working anymore, but the line input is symmetrical. Should be doable in an hour and we don't need to cut traces.
comments?
Frank.[/quote]
Hey Hey!
I just did this to one channel and it worked great!
I hooked up a high performance channel strip output though a
pair of 10k resistors to the inputs of the 1st tlo74 opamp.
When you open up the ada8000, you will see 8 cable harneses
with 5 wires each one red and 4 black. one for each channel.
With the ADA8000 knobs facing you, the left most red wire
is the + input to the tl084 opamp, the next wire to the right
of the red one is the minus input to the opamp. I cut both wires in the middle.
I soldered a 10k resistor to the red and black wire that lead to
the ADC/DAC board and wired my channel strip outputs hi and low
to the other leg of the 10 resistors.
Works great and sounds excellent! And Beh would have wanted
it this way too. 'Cause you can run your external cool preamp wires
right through the line in jacks on the ADA8000.
There are holes in the ADA8000 PCB so your cable can snake right though and to where you want to do your soldering. This makes is semi clean and while no etches were harmed and no SMD parts needed to be desoldered, with only 2 wires cut, one can put it back the way it was real easy. Why you would want to put it back however is beyond me, unless you can get an Appogee. And sell your ADA8000 off.
Do all this at your own risk and buzz out everything as you go.
Thank you to all in this thread, I am forever in your debt.
:Rock on
LSB