Further to RFR's excellent advice, may we know the make and model of receiver and speakers please?
Mainly because I am tekky/nosy but also, the amplifier needs to have adequate power for clean results.
A budget 12W per channel receiver might be fine with some 'shouty' speakers of a similar grade but will not cope with a passive monitor rated at 50W programme 100W peak.
Plus, manufctrs HAVE been known to tell slight (!!) porkies about their amplifier's power capabilities.
Dave.