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setup Recommendations:
Congratulations on your purchase of a Bryston
preamplifier.
We are confident it will provide you with
many years of musical enjoyment.
You may place your preamplifier in any conive-
mient location, with two possible exceptions. If you own
the Bryston BP-25 remote-control version, position the
preamplifier to maintain a direct line-of-sight between the
hand-held remote and the remote sensor eye located on
the left side of the preamplifier's front panel.
If you purchased the BP-25P or BP-25MC,
which includes a Phono section, avoid placing the pream-
plifier directly on top of your power amplifier.. Power
amplifiers usually employ large power supplies and the
transformer(s) in the power supplies can cause interfer-—
ence (hum) with the sensitive phono section inside the
preamp.
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BP-PS Power Supply:
The BP-PS outboard power supply provides AC
power for the BP-20 and BP-25 preamplifiers. It has a
slide power switch located on the front and a green LED
to indicate power on.
On the rear of the unit is a three-position con-
nector which provides a control voltage for remote turn
on/off of your Bryston THX amplifier(s) or other ampli-
fiers so equipped. This feature can be used in two ways
depending on the wiring arrangement utilized:
Option one provides for the preamplifier and
power amplifier to be turned on or off when you
operate the power switch located on the front of the
external power supply. Turning the power off with the
switch on the outboard power supply removes AC power
Connections:
Connect the preamplifier's left and right outputs
from either the RCA or Balanced XLR connectors to the
appropriate left and nght input jacks on your power
amplifier.
Balanced cables are an advan
if you are
using long runs of cable, (greater than 20 feet), between
your preamplifier and power amplifier.
~
Connect your CD player, tuner, tape deck, video
recorder, or laser disc, etc. to the specific left/right pream-
plifier inputs. With phono-equipped models, (BP-25P or
BP-25MC), connect your phono cables to the phono
input jacks. If your turntable leads have a separate ground
wire, it may be connected to the ground lug adjacent to
the phono inputs on the rear panel.
Next, insert the 5-pin din cable from the out-
board power supply into the input connector located on
the rear of the preamplifier. Then plug the power supply
into an appropriate AC power outlet. The preamplifier 1s
powered up by engaging the slide switch located on the
front of the extemal power supply. The "green" LED on
the outboard power supply and the preamplifier front
panel indicates power-on.
If the preamplifier has been placed in the "mute"
position operating the volume up button on the
remote will automatically un-mute the BP-25 pream-
plifier, turning the LED from red to green. On the
BP-20 you must manually activate the mute toggle
on the front panel.
Both the Mute switch and the
Polarity Invert switch are momentary-toggle types, oper-
ated by push-and-telease.
from both the preamplifier and the power amplifier(s) for
complete system shut-down.
Option two allows the power amplifier(s) to
be turned on or off with the mute button on the
hand-held remote control unit or the mute toggle on
the front panel of the preamplifier. This will shut down
your systern "for the mght', completely removing power
from the amplifiers, but leaving the preamp in the Mute/
standby mode, indicated by the red LED on the prearpli-
fier's front panel.
Please refer to the diagram on the included
separate instruction sheet for further clarity and optional
wiring afrangements.
The Bryston BP-20 and BP-25 preamps also
feature two pairs of balanced XLR input jacks. Many
signal sources, including CD-players and separate
D/A
converters are now available with Balanced outputs for
munimum noise pickup on the cables.
The tape loop may be used to insert a surround
sound processor, cassette tape deck or video tape recorder
into your system. Plug your tape deck or extemal proces-
sor's imput cables into the "To Tape' jacks, and the proces-
sor or deck's output cables into the 'From Tape' jacks at
the rear of the preamp. The tape or processor loop may
be operated via the toggle switch located on the front
panel of the preamplifier.
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