Octave Phono Module Manual page 28

5.5. Input IN 5: MC Step Up Transformer Fixed Impedance
Specifications
Sensitivity
Input Impedance
Gain Factor
Cartridge Resistance
Signal to Noise Ratio
Noise of a Transformer (graph 2) compared to an electronic MC-Input (graph 1)
The noise of the Transformer is around 10 dB lower than the noise of a low noise electronic MC
preamplifier design.
Frequency response with a cartridge DC resistance of 5 Ohm
Due to the lossless core of the Transformer the input impedance is high and constant. This results
in the flat frequency response of 20 Hz - 75 kHz (-1/-3 dB) even with a cartridge resistance up to 5
Ohm.
Advice: Due to the low frequency filter characteristic of a Transformer it is acceptable to switch off
the subsonic filter of the Phono Module if the tonearm resonance is below 8 Hz.
5. INPUTS
0.2 - 1 mV
< 80 Ohm / 30 Hz – 40 kHz
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0.5 - 5 Ohm
- 100 dB / 1 kHz Bandpass Measurement
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