Simaudio Neo 350P Preamplifier - Manual (Page 11)

350P Preamplifier
____________________________________________________________________________________
11
Internal Settings
We strongly recommend that you ask your
MOON Authorized Dealer to make these
adjustements. If you decide to do this on your
own, any damage cause to this component,
including from static discharge, will not be
covered under warranty.
There are three (3) types of settings available on the
optional phono section of the Nēo 350P;
Capacitance loading, Resistance loading, 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 phono section’s
genuine mirror-image circuit design which yields
exceptional stereo separation.
Always disconnect all audio connections and the AC
power cord of your Nēo350P prior to changing any
of the following input settings.
There are six (6) screws, located on the top of the
chassis, that you must remove using a phillips head
screw driver. 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 350P phono module to
achieve optimal sonic performance.
Resistance Loading:
There are two (2) different settings available for
setting the resistive load; 100
Ω and 47kΩ which are
represented by jumper sockets R9 for the left
channel and jumper socket R24 for the right channel
(refer to figure 2 – section labeled “LOADING”). The
factory default setting is 47k
Ω, therefore both
jumpers will be found in each of the two left most
sockets.
For moving magnet (MM) cartridges, it is
recommended that you leave the jumpers inserted
in the factory default setting of 47k
Ω. Conversely, if
you’re using a moving coil (MC) cartridge, you
should use the 100
Ω jumper settings by simply
inserting the supplied jumpers into each of the two
right-most sockets of jumpers R9 and R24.
Capacitance Loading:
There are two (2) different settings available for the
capacitive load; 0pF and 100pF which are
represented by jumper sockets C9 for the left
channel and jumper sockets C17 for the right
channel (refer to figure 2 – section labeled
“LOADING”). The factory default setting is 100pF for
a moving magnet cartridge, therefore both jumpers
will be found in each of the two right most sockets.
For MM cartridges, it is recommended that you leave
the jumpers inserted in the factory default setting of
100pF. Conversely, if you’re using a MC cartridge,
you should use the 0pF jumper settings by simply
inserting the supplied jumpers into each of the two
left-most sockets of jumpers C9 and C17.
Gain Level:
There are two (2) different settings available for
gain level. They are 40dB for MM cartridges and
60dB for MC cartridges, which are represented by
jumper socket J17 for the left channel and jumper
socket J22 for the right channel (refer to figure 2 –
section labeled “GAIN”). The factory default setting
is for a MM cartridge , therefore both jumpers will
be found in each of the two right most sockets
labeled MM; It is highly recommended that you
do not use the jumpers labeled MC for an MM
cartridge as this will overload the 350P . When
using a MC cartridge, you should insert the supplied
jumpers into each of the two left-most sockets
labeled MC.