Microplane 901 Stereo Amplifier User Manual


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5
ANALOG INPUTS The 901 provides both balanced and unbalanced inputs. Input
connections are made using the female XLR connector on the rear panel. These
connectors are wired with pin 2 positive, pin 3 negative and pin 1 ground. The unbalanced
phono type jacks are wired in parallel with pin 2 of the XLR balanced jacks. Connecting
unbalanced and balanced signals simultaneously is not recommended.
Model 901 Specifications
GAIN
Normal Mode -∞ to +10dB
Boost Mode -∞ to +20dB
FREQUENCY RESPONSE
@ 0dBu out +/- .25dB 22Hz - 120kHz
@ 0dBu out +/- .5dB 12Hz - 260kHz
@ 0dBu out +/-3dB 4Hz - 600kHz
MAXIMUM OUTPUT LEVEL
@ 1kHz, 50 Ohm load +23dBu (10.9Vrms, 30.8V p-p)
INPUT IMPEDANCE
40K Ohms balanced
20K Ohms unbalanced
OUTPUT IMPEDANCE
5 Ohms
DYNAMIC RANGE
@ 0dB gain, 50 Ohm load 116dB
@ -10dB gain, 50 Ohm load 121dB
CMRR
3.5Vrms in, 10dB gain >75dB
DISTORTION
THD+N
10dB gain, +10dBu out, 50 Ohm load 0.0051%
SMPTE
4:1 10dB gain, +10dBu out, 50 Ohm load <0.012%
ATTENUATOR CHANNEL MATCHING <0.05dB
D\A SPECIFICATIONS
Input sample rate 44.1, 48, 88.2, 96kHz
Input word length 16 to 24 bits
THD+N
44.1kHz, 24bit, 1kHz, +20dBu out 0.0016%
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