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Connect interface line out to Stage box

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I'd like to connect RME UCX line out to PA.
The mixer is far away so I have to connect to stage box which has XLR inputs that go to Mixer Mic input.

RME UCX line out specs:
• Output: 6.3 mm TRS jack, servo-balanced
• Output impedance: 75 Ohm
• Output level switchable Hi Gain, +4 dBu, -10 dBV
• Output level at 0 dBFS @ Hi Gain: +19 dBu
• Output level at 0 dBFS @ +4 dBu: +13 dBu
• Output level at 0 dBFS @ -10 dBV: +2 dBV

I am not sure about the PA Mixer specs or even if it has Pad on inputs.

I am sending full stereo mix, so don't want any artifacts like tonal shifts or loss of dynamics.

What is the best way to connect this ?
Is simply lowering output level going to work ?
Do I need a DI Box ?

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source is having enough cojones to drive long trace


but you really need to connect that line (high level) to appropriate input in PA Mix , to preserve dynamics

worse case would be using custom balanced attenuator box or balanced to balanced DI Box , but you can still do that


in any case - long trace must stay balanced

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