Simaudio Moon 340i Neo D2PX, Руководство пользователя

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Owner’s Manual
11
There are three (3) types of settings available on the
optional phono section of the
Nēo 340i ; 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
Nēo 340i 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
340i phono module to achieve
optimal sonic performance.
Resistance Loading :
There are two (2) different settings available for setting
the resistive load; 100
Ω
and 47k
Ω
which are
represented by jumper sockets R12 for the left channel
and jumper socket R29 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 R12 and R29.
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 J18
for the left channel and jumper socket J24 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 340i
. When using a
MC cartridge, you should insert the supplied jumpers
into each of the two left-most sockets labeled MC.
Optional Balanced Inputs
The balanced input provides for one additional line-
level input on an XLR connector. The “B1” input uses a
fully balanced differential circuit and is intended for use
with a source component that outputs a fully balanced
differential signal. The
Nēo 340i balanced input takes
full advantage of the benefits of balanced circuitry:
When using an unbalanced interconnect, the audio
signal runs through both the center wire and the
shield/ground wire. Any noise picked up by this
interconnect (ie. nearby magnetic fields such as an AC
power cord) will be reproduced by both the
preamplifier and amplifier, then heard through the
loudspeakers. Conversely, a balanced interconnect has
three separate conductors; one for the ground and two
for the actual signal. These two signals are identical
except that one is 180 degrees out of phase with the
other. For example, when one conductor is carrying a
signal of +10 Volts, the other will be carrying a signal of
–10 Volts. When these two inverted signals on a
balanced line are output from the
Nēo 340i , any noise
picked up by the interconnect will be eliminated since a
differential circuit amplifies only the difference between
these two signals: Noise on a balanced interconnect will
be equal on both conductors and therefore cancel out.