Yes Brian, that's a good move.
Back in the 70s we built the first console for the show 'Jesus Christ - Superstar' when it opened in London. It had 106 mic channels and was arranged as 6 stereo mixing buses. To keep the mix-amp noise down, I split the buses into 4 sections each with their own mix amp, then combined them in a master section.
Nowadays, I would do it balanced; there's a 3dB (or is it 6?) noise advantage in the balanced mixing, plus 6dB in overload advantage; and you can say goodbye to ground path problems.
Analag's tube mixing schematic is interesting, but I don't see much advantage in using the transformer impedance converter and tube amplifier, when you still only have an unbalanced mixing system. Would it not be more sensible to use a good low noise solid state virtual-earth type mix amp operating at low gain, then use a simple tube amplifier as gain makeup? :wink:
Ted Fletcher
Back in the 70s we built the first console for the show 'Jesus Christ - Superstar' when it opened in London. It had 106 mic channels and was arranged as 6 stereo mixing buses. To keep the mix-amp noise down, I split the buses into 4 sections each with their own mix amp, then combined them in a master section.
Nowadays, I would do it balanced; there's a 3dB (or is it 6?) noise advantage in the balanced mixing, plus 6dB in overload advantage; and you can say goodbye to ground path problems.
Analag's tube mixing schematic is interesting, but I don't see much advantage in using the transformer impedance converter and tube amplifier, when you still only have an unbalanced mixing system. Would it not be more sensible to use a good low noise solid state virtual-earth type mix amp operating at low gain, then use a simple tube amplifier as gain makeup? :wink:
Ted Fletcher
