SoundCraft Spirit M5 + Kawai MP8

[Dk0r]

There is a severe degradation in sound quality when I monitor my kawai mp8 digital piano via the m5. For example my mp8 has a rhodes voice that uses some kind of stereo phasing to make a 'wah-wah' effect between the left and right channels. As soon as the mp8 is routed through the m5 such characteristics are lost.

I've tried both the m5's headphone and monitor outs and haveconnected the mp8 via xlr, 1/4" and 1/4" to rca to every input on the m5 with no change in result.

Any suggestions?