Meridian call their processors 'controllers' and not 'pre amps' for a reason, because they control their speakers.

The speakers are a DAC, pre amp, power amp and speaker in one cabinet.

They take a fixed level digital signal and the controller then sends signals to each to tell it what to do in regard to volume etc.

You simply can't use other kit with them as other kit does not have the control.

No Darling, I've had it months!