I have a set of ICEPower 1000 ASP mono blocks and got interested in the Hypex NC400 (hope to hear NC1200 at RMAF 2013 in Denver). In order to save money since this was just an evaluation I only built one mono block (using an SMPS600 and NC400 so just 1 channel). I have only had it in the system a few days, it works fine, there are slight differences between it and the ICEPower module but I am not hearing anything like the type of improvement I expected based on all the postings.
Am I doing myself a disservice by trying to evaluate with only 1 channel (is it even possible). I have been using a combination of a stereo mix with Hypex (L) & IcePower (R) and a single channel comparison using a mono recording.