Simaudio P 5.3 - Manual (Page 8)

MOON P 5.3 Stereo Preamplifier
Front Panel Controls (continued)
Pressing the “Mute” button reduces the current volume to “0”. Pressing the “Mute” button a second time will reinstate the
volume back to its previous level.
The rotary “volume” control determines the gain setting, which ranges from ‘0.0dB’ (no output) to ’50.0dB’ (full output). This
control does not function like a typical volume: When you rotate the dial, either clockwise to raise the volume or counter-
clockwise to lower the volume, you are actually engaging a precision optical encoder which selects, via a relay network, very
high quality metal-film resistors that the audio signal passes through. The result is a proprietary gain circuit, called M-eVOL,
that doesn’t degrade the audio signal regardless of the setting, unlike all potentiometer based circuits. Futhermore, since
there are no actual moving parts, this technology has a minimum life expectancy of one million rotations.
The range of fifty (50) unique gain settings is based on neither a linear nor logarithmic scale. Instead, we decided on
relatively small variations for each of the lower position settings from ‘1’ to ‘35’. The variations are somewhat larger from
positions ‘36’ through ‘50’. For the best possible performance, it is recommended that you don’t turn the rotary control too
quickly as some gain settings will be skipped and extra rotations will be required to reach position ‘50’.
Note: To change the balance between the left and right channels, please refer to the section “Remote Control Operation”.
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Front Panel Controls 8