John and Mojo, thank you for taking the time to reply. I am by no means an expert on any of this. Human hearing ranges between 20Hz to 20kHz and lowest audible sound is somewhere between 0 and 4 dB. At the 20kHz, the roll-off by 0.6-0.7 is very unlikely to be audible to us. However, there are some people (see Stereophile's review of the Ayre C-5xe universal player) ,who feel that a filter that provides a flatter curve may not be audible in itself, but offers a better time-domain performance, particularly regarding the accuracy of stereo imaging. In any case, I am sure that my untrained ears still cannot tell the difference. Mojo indicated that the experts will find A1400's performance to be "exceedingly excellent". I have no doubt that this is indeed the case, and I am looking forward to reading the reviews by such experts.
John
