Bel Canto Design PHONO 1 - Manual (Page 6)

Page 6 PHONO Owner's Manual
Gain Settings, Initial Setup, and Placement
• Gain Settings
Internal jumpers accommodate Moving
Magnet, Moving Coil (Low Gain), and Moving Coil
(High Gain) settings. The Phono1 is shipped
from the factory set for Moving Magnet
operation. Gain structure changes are easily
made by first removing the two gold nuts from
the RCA output jacks using a 5/8” socket. Take
care not to scratch the chassis by avoiding
contact between the socket and the end panel.
Next, remove the four stainless steel screws
securing the opposite end panel with a 7/64”
Allen tool. Carefully slide the circuit board partly
out by slowly pulling on the input side end panel
while securely holding the chassis. The circuit
board only needs to be slid out part way to gain
access to the internal jumpers. There are a total
of 6 blue jumpers, which are labeled on the
circuit board in the following locations: J7, J4,
J6, J11, J3, and J5. They are easily removed by
pulling them off of the 2-pin headers. When
replacing the jumpers, be sure the jumper is
oriented with the characters ‘3M’ at the top,
otherwise the jumper may not function.
MOVING MAGNET CARTRIDGE
When using a Moving Magnet cartridge, the
jumpers in locations J4, J6, J3, and J5 need to
be placed in the positions labeled ‘MM’ (40dB of
gain at 1kHz). The two remaining jumpers in
locations J7 and J11 are inactive with this
setting, and their positions are therefore
irrelevant.
MOVING COIL CARTRIDGE
When using a Moving Coil cartridge, the
jumpers in locations J4, J6, J3, and J5 need to
be placed in the positions labeled ‘MC’. If low
gain (54dB at 1 kHz) is desired, place the
jumpers in locations J2 and J11 in the positions
labeled ‘LOW’. If high gain (60dB at 1 kHz) is
desired, place the jumpers in locations J2 and
J11 in the positions labeled ‘HIGH’.
Bel Canto recommends that you consult your
turntable consultant / dealer to ascertain the
exact setting to use with your particular system.
In the lack of specific system information the
following can be used as a guide:
- Use the Hi gain/MC setting when the output of
your cartridge has less than .5mv output.
- Use the Low gain/MC setting when your
cartridge has more than .5mv output.
When set for Moving Coil, the externally
accessible loading DIP switches located
between the input jacks are active. Loading
options range from 50 Ohms to 50K Ohms, and
right and left channels are adjustable
independently.
• Cartridge Loading
Cartridge loading settings should directly
correspond to the cartridge manufacturers
recommended loading figure. If you don’t know
the recommended loading of your cartridge,
please contact the manufacturer or your dealer
for this information.
Loading settings can be done using the DIP
switches seen through the opening near the
RCA inputs of your phono stage. For the normal
settings seen on the panel below the DIP switch
opening use a pen or small pointed object to
switch down the corresponding DIP switch. All
other switches should be in the up position.
Note: Changes to the DIP switch
positions only apply when the MM/MC
jumpers, located inside the Phono1, are
in the Moving Coil (MC) position.
Please refer to the following chart for a
complete listing of loading settings
possible to correctly match your
cartridge: