MOON P-5 Dual-Mono Preamplifier
Front Panel Controls
Figure 1: Front panel of Moon P-5 Dual-Mono Preamplifier
The front panel will look similar to Figure 1 (above). The large digital display window indicates the
relative gain setting (from ‘0’ to ‘50’) for both the left and right channels. As well, whenever you
change the selected input source, it’s number will appear in the window for 3 seconds before reverting
back to the gain setting. Directly to the right of the digital display window is a button labeled “Display”
which allows you to turn the digital display on and off. The sonic performance of the MOON P-5
Dual-Mono preamplifier may improve slightly when the display is turned off simply because the power
supply has one less task to perform.
The “Stand by/On” button disengages the input section from the rest of the P-5’s circuitry and turns
off the digital display. However, when in “Stand by” mode all audio circuitry remains powered up to
help maintain optimal performance. When switching back from “Stand by” to the “on” mode, both the
‘input’ and gain level settings will be memorized from the previous listening session. The blue pilot LED
will not be illuminated when the P-5 is in “Stand by” mode, however the PS-5’s LED will remain on.
The “Monitor” button switches the output signal for the “tape out” on and off. The output level is fixed
and therefore independent of the P-5’s gain setting. A small round LED will illuminate in the lower
right corner of the display window when the “Monitor” is on. As a result of the proprietary gain stage
design used in this preamplifier, the gain setting must be greater than ‘0’ for an output signal to reach
the “tape out”.
The “Mute” button triggers a decrease in the output gain setting to a factor of 10% of the current
setting. For example, if your current setting was ‘30’ and you pressed the “Mute” button, the gain
setting will drop to ‘3’. Pressing the “Mute” button a second time will reinstate the output gain level
back to ‘30’.
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Front Panel Controls 7
(13 pages)
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