Simaudio 110LP Phono Preamplifier - Manual (Page 6)

MOON 110LP Phono Preamplifier
Internal Adjustments
There are three (3) types of input adjustments available on the MOON 110LP Phono Preamplifier allowing you to configrue it
for either a moving magnet or moving coil cartridge; Capacitance loading, Resistance loading and Gain level. Each adjustment
is made through the use of jumpers. For each type of adjustment, there are 2 banks of jumpers – one each for the left and
right channels. This is the result of the 110LP’s genuine mirror-image circuit design which yields exceptional stereo
separation.
Always disconnect your 110LP from either your preamplifier or integrated amplifier prior to changing any of the following
input settings. Then disconnect the external AC power supply from the rear of the MOON 110LP
There are a total of four (4) screws on the rear side of the chassis that you must remove using the included allen-key. Once
these screws are removed, carefully slide off the chassis cover. Once the cover is removed, you are ready to make all of the
necessary internal adjustments to the 110LP to achieve optimal sonic performance.
Moving Magnet Cartridge Loading:
There are two (2) different settings available for each the resistive load and capacitive load; One for moving magnet (MM)
cartridges and moving coil cartridges (MC). The 110LP has a factory default setting for an MM cartridge (refer to figure 2).
The capacitance is set to 100pF, whereby both of the jumpers are mounted into the two right-most pins in socket C9 (left
channel) and socket C17 (right channel). The resisitance is set to 47k
Ω, whereby both of the jumpers are mounted into the
two left-most pins in socket R9 (left channel) and socket R24 (right channel).
Figure 2: Left and right channel jumper banks for moving magnet (default) loading adjustments
The gain setting for an MM cartridge should be 40dB (refer to figure 3), whereby the jumpers are mounted into the right-most
pins for socket J17 (left channel) and socket J22 (right channel).
Figure 3: Left and right channel jumper banks for moving magnet (default) gain adjustment
The capacitance, resistance and gain setting sockets for each channel must always have a jumper inserted into them,
otherwise the 110LP will not produce an output signal. As well, you should always maintain the same settings for both
channels, otherwise sound will vary significantly between the left and right channels of your audio system.
Moving Coil Cartridge Loading:
To configure your MOON 110LP for use with a moving coil (MC) cartridge (refer to figure 4), we recommend setting the
capacitance to 0pF, whereby both of the jumpers are mounted into the two left-most pins in socket C9 (left channel) and
socket C17 (right channel). The resisitance must be set to 100
Ω, whereby both of the jumpers are mounted into the two
right-most pins in socket R9 (left channel) and socket R24 (right channel).
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Internal Settings 6