Having just upgraded to set of Audio Physic Virgo 25's on Marks recommendation which to say are incredible is a gross understatement, I happened to mention what he would consider would be a good upgrade on my current excellent Krell KAV250a power amp. Having read numerous reviews on Macintosh, Sugden, Cary Audio & of course the other Krell he's mention the Wyred 4 Sound SX1000R's mono's that they had used with great success at various shows & with existing customers. First impressions of the SX1000R's is are these really going to compete with the legendary Krell's etc that everyone seems to rave about over many years, as they simply don't look up to the job. Funnily enough once placed in my system they didn't look unlike the Krell in terms of looks as they are very similar design in both colour & design. After powering them up & leaving for a few hours decided to put on Hells Freezes Over - classic Eagles CD- clearly these mono's are in a very different league to the Krell in every way, soundstage, clarity & very analogue sounding which is the last thing expected from Class D. Although they need a good 2-4 weeks bedding in according to Wyred 4 Sound who I emailed recently, they are something very special . Having spoken to Tony Holt at the company people in the US have been using them in seriously Hi End systems & blown away by them. Mark has also arranged for a Mamp for my centre channel which I'm sure is going to be just as good, What's really amazing is the Wyred 4 Sound product range they aren't stupidly expensive unlike some of the so called competition on the market which is a massive plus for the consumer. Overall Mark has managed to transform what I thought was a great system into what is now a truly breathtaking one along with my bank balance to boot- A true Sales Professional there's no doubt?