The setup I am using is like this:
– Denon MCX 8000 standalone mixing system, with balanced XLR outputs at +4 dBU nominal level
– Reloop RMX 60 Digital mixer, with balanced XLR outputs at 0 dBV (+2 dBU) nominal level
– Allen & Heath Zed 6 mixer
– Behringer FBQ 6200 HD equaliser
– Behringer CX 3400 crossover
The Denon MCX 8000 mixer balanced XLR master outputs are connected to the Allen Heath Zed 6 stereo input channel (ST1) with a Cordial XLR to TRS cables and the input gain knob, channel level knob and the main mix output fader are set to 0 dB attenuation (unity gain).
The Reloop RMX 60 mixer balanced XLR master outputs are connected to the Allen Heath Zed 6 stereo input channel (ST2) with a Cordial XLR to TRS cables and the input gain knob, channel level knob and the main mix output fader are set to 0 dB attenuation (unity gain).
Now, although the MCX 8000 balanced master outputs are sending a +4 dBU signal level, the output on the Zed 6 main mix is only around 0 dBU when it should hover around +6 dbu mark on the output meters.
The Reloop RMX 60 mixer balanced master outputs are set to send +4 dBU signal level and the Zed 6 main mix level meters are hovering around +6 dBU mark, as it should be.
I opened a support ticket explaining the situation and I also asked if there could be any mismatch between Denon MCX 8000 balanced master output impedance and Allen Heath Zed 6 stereo TRS (supposedly balanced) input impedance.
Mr. Chris Panks from Allen Heath support replied: “The TRS jacks on the stereo inputs are not balanced. ST1 and ST2 are unbalanced. They will accept TS and TRS jacks.”
