SNR (MC)
SNR (MC) is the signal-to-noise ratio of a phono stage’s moving-coil input. It compares a stated reference signal with background noise, in decibels (dB).
A larger figure means less noise relative to that signal, provided the test conditions match. Equivalent input noise instead expresses noise as an equivalent level at the input; it is not a signal-to-noise ratio.
SNR (MC) — Phono Preamp
Compare the reference signal level, gain setting, bandwidth, weighting and source termination. Bandwidth is the frequency range measured; weighting changes how frequencies contribute to the noise reading. Source termination is the impedance connected to the input during testing. Without these conditions, the figures cannot fairly rank two stages.
Use the MC result: an MM or line-input figure cannot stand in for it. A high MC SNR does not guarantee a quiet complete setup: external interference can still add noise through the cartridge, cables or other circuitry.
Sources
- Marantz PM-10: Specifications — Marantz
- Accuphase AD-60 specifications — Accuphase
- Analog Devices AN-940: Low Noise Amplifier Selection Guide — Analog Devices