Ross 12x2 mixing console schematic?

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you'd be lucky to get any info on these even when they where in production their tech support was pretty poor.
at one point in my life i purchased a set of "Typhoon" speakers they made along with two amps after a problem with the amp and the frustration i went through trying to get parts and info i gave up and unloaded everything
 
What is your exact noise problem anyway?
Please describe or even better record and post.

That´s a decent generic mixer, no better and no worse than a million others.
Noise should not be objectionable or even noticed unless recording a hummingbird 30 feet away but on a Rock/Pop situation it dissappears.

Unless you are setting gain and EQ levels wrong.
 
Hi JMFahey,

yes, I agree on you. It's noise performance is acceptable but I thought about adding the missing P48-supply and in the same run improving the input stage. I've seen TL072's in it - they are no crap, neither very low noise. Just replacing them may not yield a huge noise improvement as the other impedances in front of the opamps may be dominant in terms of noise. I regard this subject as solved and would like to thank you all for your time!

All the best,

Martin
 
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