I’ve been thinking about this, and as they say…”It’s a 2 way street”.
The chart above only provides a correlation for a ‘generic Mic-In resistance of 10 kOhms’ with the actual resistance of 47 kOhms utilized on Line-In.
To correlate the Mic-In and the Line-In with the roll-off frequencies ‘based on a generic Mic-In of 10 kOhms’, with the Mic-In and Line-In of the pcm-m1, you would end up with the following chart.
Mic-in frequencies (based on the pcm-m1 Mic-In resistance of 4.7 kOhm) :
(16Hz) > 32Hz 2,3,4
(69Hz) > 138Hz 1,4
(95Hz) > 190Hz 1,3
(107Hz) > 214Hz 1,3,4
(160Hz) > 320Hz 1,2
(195Hz) > 390Hz 1,2,4
(888Hz) > 1776Hz 1,2,3
Line-in frequencies (based on the pcm-m1 Line-In resistance of 47 kOhm) :
(16Hz) > 3,2Hz 2,3,4
(69Hz) > 13,8Hz 1,4
(95Hz) > 19Hz 1,3
(107Hz) > 21,4Hz 1,3,4
(160Hz) > 32Hz 1,2
(195Hz) > 39Hz 1,2,4
(888Hz) > 177,6Hz 1,2,3
Therefore, it appears that any pcm-m1 users that record Mic-In may be rolling off twice as much bass as they think they are.
Any thoughts on this? Agree / Disagree?