Hi Sugarbrie - it's my understanding that Michael Creek hasn't had anything to do with Cambridge Audio in quite some time. Could be wrong though...
I'd be curious to hear the 640P compared to the newer Creek phono-stages. The specs from the 640P don't match any of the recent Creek designs though as far as I can tell:
Gain @ 1kHz: 39dB / 55dB
Nominal output: 300mV
Sensitivity for nominal output: 3.35mV / 0.5mV
THD 20Hz-20kHz: <0.007%
RIAA curve accuracy <+/-0.3dB 20Hz-50kHz
Signal to noise ratio (using Audio Precision RIAA-1 with grounded inputs) >85dB / 82dB
Crosstalk @ 20kHz >76dB / >72dB
BTW, Spearit Sound (where I purchased my 640P) has some great internal pics of the 640P and 540P (I was not impressed at all with the 540P...):
http://www.northamptonaudio.com/Cambridge_Audio/Cambridge_Audio_540p.asp
I'd be curious to hear the 640P compared to the newer Creek phono-stages. The specs from the 640P don't match any of the recent Creek designs though as far as I can tell:
Gain @ 1kHz: 39dB / 55dB
Nominal output: 300mV
Sensitivity for nominal output: 3.35mV / 0.5mV
THD 20Hz-20kHz: <0.007%
RIAA curve accuracy <+/-0.3dB 20Hz-50kHz
Signal to noise ratio (using Audio Precision RIAA-1 with grounded inputs) >85dB / 82dB
Crosstalk @ 20kHz >76dB / >72dB
BTW, Spearit Sound (where I purchased my 640P) has some great internal pics of the 640P and 540P (I was not impressed at all with the 540P...):
http://www.northamptonaudio.com/Cambridge_Audio/Cambridge_Audio_540p.asp