Manual
310LP Phono Preamplifier
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9
Internal Settings
There are four (4) types of input settings available
on the MOON 310LP Phono Preamplifier;
Capacitance loading, Resistance loading,
Equalization curve and Gain level. Each setting is
adjustable through the use of jumpers. For each
type of setting, there are 2 banks of jumpers – one
each for the left and right channels. This is the
result of the 310LP’s genuine mirror-image circuit
design which yields exceptional stereo separation.
Always place the preamplifier that your 310LP is
connected to, either into mute or stand-by mode
prior to changing any of the following input settings.
Then disconnect the AC power cord from the rear of
the 310LP.
There are a total of eight (8) screws that you must
remove using the included allen-key four each on
either side of the chassis. Once these screws are
removed, carefully lift off the chassis cover. Once
the cover is removed, you are ready to make all of
the necessary internal adjustments to the 310LP to
achieve optimal sonic performance.
Resistance Loading:
There are five (5) different settings available for
setting the resistive load; 10Ω, 100Ω, 470Ω, 1kΩ
and 47kΩ which are represented by jumper sockets
J9, J10, J11, J12 and J13 respectively for the left
channel and jumper sockets J27, J28, J29, J30 and
J31 for the right channel (refer to figure 2). The
factory default setting is 47kΩ, therefore jumpers
will be found in sockets J13 & J31.
Figure 2: Left and right channel jumper banks
default setting for resistance load adjustments
In the event that you’re using a moving magnet
(MM) cartridge, it is recommended that you leave the
jumpers inserted in sockets J13 & J31 (the factory
default) for a 47kΩ resistive load. Conversely, if
you’re using a moving coil (MC) cartridge, experiment
with the four (4) other available loads ranging from
10Ω through 1KΩ, selecting the load that provides
the best possible sound quality. For example, if you
decided on using the resistance setting of 100Ω, then
you would insert the supplied jumpers into sockets
J10 and J28 (refer to figure 3) .
Figure 3: Left and right channels set to
a 100Ω resistance load