Let’s look into some measurements with audible effect – from John Atkinson:
The Squeezebox's frequency response (fig.1) showed a slight shelving-down at low frequencies that might just be audible given the wide range covered. (this has nothing to do with SMPS). Now to something that may be effected by the minuscule wall-wart.: Fig.2 shows the spectrum of the Squeezebox's analog output analyzed with a swept 1/3-octave bandpass filter while it decoded dithered data representing a 1kHz tone at –90dBFS. The traces are free from both power-supply and harmonic-distortion spuriae and peak at –90dBFS, suggesting good DAC linearity. The right-channel trace has some energy peaks centered on 9kHz and 18kHz, but these are low in level. Both channels also have a small energy peak evident at 30Hz, and the overall noise floor is 10–20dB higher in the midrange and bass than with the best 16-bit playback devices. Summarize: …the Squeezebox measures very well. Its noise floor is higher than that of good CD players. +-------------------------------------------------------------------+ |Filename: 906SB3FIG2.jpg | |Download: http://forums.slimdevices.com/attachment.php?attachmentid=9272| +-------------------------------------------------------------------+ -- baardbaard ------------------------------------------------------------------------ baardbaard's Profile: http://forums.slimdevices.com/member.php?userid=36420 View this thread: http://forums.slimdevices.com/showthread.php?t=75092 _______________________________________________ Touch mailing list Touch@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/touch
