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General
Welcome
Thank you for your purchase of a Bryston BP2-MM/
MC moving magnet phono preamplifier. Powered by
a Bryston PS-3, the BP2-MM/MC is an extremely high
performance, yet compact and practical active gain
stage for your vinyl playback system with moving
magnet cartridge. Our customers are a valuable
resource to whom we turn for a measure of success.
We welcome your comments on the Bryston BP2-
MM/MC.
Description
The Bryston BP2-MM/MC is a phono preamplifier
designed to amplify signals from a moving magnet
or moving coil phono cartridge to line-level voltage.
The BP-2 MM/MC includes high quality step-up
transformers factory configured for either 20 or
30dB of gain.
Features
Bryston BP2-MM/MC includes the following features:
• High quality / low distortion active gain stage
• Factory option for 20 or 31dB step-up
transformer.
MC-20 - 1:10 step-up for mc cartridges up to 45Ω
- optimum 25 ohms with >3mV output
MC-30 - 1:37 step-up for mc cartridges up TO 5Ω
- optimum 3 ohms with ≤ 3mV output
• Selectable loading between 100pF and 400pF
when used for MM cartridge gain
• Switchable between MC and MM mode.
• Powered by external Bryston PS-3 power supply
• Superb RIAA accuracy
• All steel chassis and top cover.
Shipping Box and Packing Material
Please keep the original shipping box and all
packing material. This will ensure the BP2-MM/MC is
protected in future transport. In the unlikely event
you have a problem and must return it for service,
you must use the proper packing material. Ship the
unit only in the original packing material, as the unit
is not insurable by carriers otherwise. Replacement
packing materials consisting of a shipping carton
with plastic foam inserts is available from Bryston
for a small fee.
Installation and Usage
Placement
The BP2-MM/MC is a cool-running gain stage and
can be placed in the position most convenient to
your circumstance. The nature of the product is
to amplify very low level signals, so some care in
placement is worth while to maximize performance.
Do not place the unit next to electronics known to
radiate a high amount of noise. Do not stack upon
the Bryston power supply.
Connecting to Power Supply
The BP2-MM/MC must be used with a Bryston
power supply model PS-3 or MPS-2. Only the XLR-6
terminated interconnect included with the BP2-
MM/MC should be used to connect the BP2-MM/
MC to the power supply. Insert the female end of
the cable into the BP2-MM/MC and the male end to
the approved power supply. A secure connection
is established when you hear the cable click into
place.
Cartridge Loading
Moving magnet cartridges perform best when
presented with a capacitive load. The BP2-MM/
MC offers four settings for capacitive loading which
can be set internally with jumpers. The desired
loading for your cartridge may be found in the
documentation included with the cartridge. Note
that the attached interconnects also present
some capacitive load. Consult the documentation
included with your interconnect for specifics of your
model.
To set additional loading, disconnect the BP2-MM/
MC from the power supply. Remove the top by
unscrewing each of 4 screws (2 on each side) using a
T-8 Torx screwdriver. Lift the top straight off. Locate
the jumpers for each channel highlighted in green
below and labeled JC1 and JC2 respectively.
