i have noticed that Rega is still using the Wolfson chip that was used in the original Rega DAC c.2012 for the DAC-R c.2015. why change why fix something if it ain't broken. i have a Wolfson in my iPod Video and it is considered to be the best iPod that Apple ever produce. so Rega in 2015 decided not to down the Sabre road but kept the Wolfson? the Cirrus DAC in my NAD is very good sounding and Wolfson bought their company. maybe DSD and the newer formats me sound better, but just another excuse to buy the White Album. we may have reached the pinnacle of standard PCM, not sure what DSD can offer, have not heard it. to recreate a perfect analog signal we would have to sample to infinity? is this possible. can the human ear really decern the difference between a well recorded analog that has been converted to digital. the source analog recording is just as important as the DAC at the other end. a great sounding record will most likely yield a good sounding CD. i agree with lowrider57 that PSU's can make a big difference. their is a company called SBooster out of the UK, that makes a linear outboard PSU for the NAD D1050. have not heard it. hard to find used also. looking forward to hearing the Qutest, but will have to fly down to Kuala Lumpur to Circle Audio when i attend the MPO next month. no Chord dealers here.