Meridian 562 User Manual page 32

The lowest noise contribution from the analogue–digital converter.
The best loudness match when switching from LP to other sources.
However, under many circumstances you may prefer to set 562 to a lower
sensitivity – i.e. larger number in Gain – because you prefer the sound
overall. The reason is that the analogue–digital converter has such a wide
range compared to the surface-noise of LPs, that you can allow more
headroom (for very short clicks due to dust etc.) without any noise
penalty. This alternative fitting of the available dynamic-range of the LP
signal into the 562 input 'window', can give better sound overall but at the
expense of level matching between sources.
Tip Start at the 2dB setting.
Technical information
562 User Guide
32