Mono Mixing

When switching to mono, I often use the mono button on the Stereo Enhancer - but what about the width setting… should that be 0 or 100 ?

Thanks

The width is presumably only active when the button is off so it should sound the same.
Do you hear a difference?

There does seem to be a difference

Do you have control room active?

Only reason I could imagine any difference is if you are hearing one mono version and also the stereo version because you have control room and stereo outs active at the same time. (bad!)

In correct use feeding a single stereo out there is no difference when the mono switch is on and the width knob is changed.