Simaudio 810LP Phono Preamplifier - Manual (Page 9)

810LP Reference Dual-Mono Phono Preamplifier
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9
Cartridge Loading Adjustments
Prior to making any of these adjustments, always
disconnect the AC power cord and all interconnects
from MOON 810LP. We strongly recommend using
the pen shaped plastic hand tool that we have
included with your 810LP as it was specifically
designed for this purpose. Using another tool made
from a material other than plastic may damage the
DIP switches and/or scratch the painted surface on
the bottom of the 810LP’. Finally, to achieve the
best possible sonic performance, it is absolutely
necessary that all settings be identical for both the
left and the right channels.
In the following examples, the color
white always indicates the
position - left (‘ON’) or right
(‘OFF’) of the DIP switch. In the
example to the left, the DIP switch is in the left
position (‘ON’). This is to be consistent with the
actual white color of these switches.
Capacitance Loading:
There are sixteen (16) unique capacitance loading
settings available using DIP switches 7 through 10,
located at the top of the upper DIP switch bank. The
range of available settings begins at 0pF and ends at
1120pF:
Figure 2: Left and right channel DIP switches for capacitance loading adjustments
The factory default is 100 pF, whereby DIP switches
10, 9, and 8 are all in the right (‘OFF’) position and
DIP switch 7 is in the left position (‘ON’) as seen in
the example to the right. This setting
would be applicable for most moving
magnet cartridges.
When you are using a moving coil cartridge, you will
most likely want to set the capacitance loading to
0pF. This is done by positioning all four DIP switches
(7, 8, 9, & 10) to the right position (‘OFF’)
as seen in the example to the right.
A comprehensive diagram of the DIP switch
combinations for all 16 available capacitance loading
settings can be seen on the bottom panel,
immediately to the right of the switches. Finally, the
values written beside the DIP switch number
represent the capacitance load if only that switch is
in the left position (‘ON’). For example, when only
switch 10 is in the left position (‘ON’), the load value
will be 470pF; when only switch 9 is in the left
position (‘ON’), the load value will be 330pF; and
finally when only switch 8 is in the left position
(‘ON’), the load value will be 220pF.