mc1500d
the st line are the older ones that break real easily, the Mclass (hince the mc) is ALOT better quality all around. and the PR is thier pro referance series.....never used it but IMO the mclass is where the goods are at. ive used several old and new memphis amps and the quality is AMAZING....hard to destroy too //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif