This answer applies to MRx Mk1
Depending on its usage, please ensure that the mode switch on the rear of your MRx is correctly set. We envisage that most people will use MRx positioned horizontally and in this position the mode switch should be set to STEREO. LEFT, RIGHT and MONO settings are for when MRx is used as a stereo pair or if a mono output is required.
If not, please do not hesitate to contact us via our support enquiry form.