> Most of the tests were done using a pair of highly regarded, > smooth-measuring full-range loudspeakers in a rural listening room with > an ambient noise floor of about 19 dBA SPL, all electronics on (see Fig. > 2).
This vagueness about the equipment being used is a bit of a concern, but I managed to find out from another source that: > The playback equipment in this system consisted of an Adcom GTP-450 > preamp and a Carver M1.5t power amplifier. Speaker cables were 8 feet > of generic 12-gauge stranded wire; the line-level connecting cables > were garden-variety. Three different players were used: a Pioneer > DV-563A universal player, a Sony XA777ES SACD model, and a Yamaha > DVD-S1500. The loudspeakers were a pair of Snell C5s. It seems as if the equipment used to evaluate the audibility of the 16/44.1 bottleneck was variable and never itself truly verified for audio bandwidth and dynamic range. If this were my measurement campaign I would insist on a frequency sweep of the entire equipment chain from source to sound waves captured with a calibrated microphone at the listening position. As it is, I am not convinced that the introduced 16/44.1 bottleneck was truly the dominant system bottle neck. I don't have any worries about the Carver amp, but the Adcom pre has a 0.5dB bandwidth of 20Hz to 20kHz, and the speakers top out at 22kHz. It's 2011 and its still "well past time to settle the matter scientifically." -- dsdreamer ---------------------- "Dreamer, easy in the chair that really fits you..." ------------------------------------------------------------------------ dsdreamer's Profile: http://forums.slimdevices.com/member.php?userid=12588 View this thread: http://forums.slimdevices.com/showthread.php?t=85879
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