Bryston BP26DA - Manual (Page 4)

BP26 Preamplifiers
INTRODUCTION
Thank you for choosing a Bryston Preamplifier. Bryston
welcomes any suggestions you may have, or comments
regarding the operation of your amplifier. We con-
sider you, our customer, to be Bryston’s most important
resource, and your opinion is very much appreciated.
SETUP
The Bryston BP26 pre-amps, with remote-control,
should be placed where there is a direct line-of-sight
between the hand-held remote and the remote infra-red
sensor eye located on the left side of the pre-amplifier’s
front panel.
If you purchased the BP26P or BP26MC, both of
which include a Phono section, avoid placing the pre-
amplifier directly on top of your power amplifier. Power
amplifiers usually employ large power supplies and the
transformers) in the power supplies can cause interfer-
ence (hum) with the sensitive phono section inside the
pre-amp.
Next, insert the 6-pin XLR cable from the outboard
power supply into the “Power Supply” input connector (6
pin XLR) located on the rear of the preamplifier. Then
plug the power supply into an appropriate AC power
outlet. The preamplifier is powered up by engaging the
push button switch located on the front of the MPS2
external power supply. The “green” LED on the outboard
power supply and the preamplifier front panel indicates
power-on.
MPS2 Power Supply
The BP26 preamp is powered by the MPS2 power
supply. Please refer to the MPS2 POWER SUPPLY
OWNERS MANUAL for more information.
A power supply cable, for the sole purpose of connect-
ing the BP26 preamp to the MPS2 power supply, is
supplied with your BP26 preamp. Do not dissassemble
or attempt to modify this cable in any way as it may be
unsafe to do so.
WARNING! Main output 1, 2, 3 & 4 connector ter-
minals on the MPS2 Power Supply rear panel are
HAZARDOUS LIVE and present a risk of electric
shock. Use only preassembled power interconnect
cables provided by Bryston for connection of these ter-
minals.
ANALOG AUDIO CONNECTIONS to OTHER
EQUIPMENT
All inputs and outputs employ fully discrete active cir-
cuitry and all input and output connectors have gold
plated contact surfaces. Only cables with high quality
gold plated connectors should be used with your pre-
amp to avoid noise and distortion from the corrosion that
will eventually appear on poorly plated cable connectors.
Connect the pre-amplifier’s left and right outputs from either
the RCA or Balanced XLR connectors to the appropriate
left and right input jacks on your power amplifier. Balanced
cables are an advantage if you are using long runs of cable,
(greater than 10 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 stage equipped models, (BP26P
& BP26MC) 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 post adjacent to the phono
inputs on the rear panel.
The Bryston BP26 pre-amps also feature two pairs of bal-
anced XLR input jacks. Many signal sources, including CD-
players and separate D/A converters are now available with
Balanced outputs for minimum 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 external processor’s
input cables into the “To Tape” jacks, and the processor or
deck’s output cables into the “From Tape” jacks at the rear
of the pre-amp. The tape or processor loop may be oper-
ated via the “Tape/Source” toggle switch located on the front
panel of the preamplifier.
HEADPHONE OUTPUT
It is recommended that you use headphones with an
impedance of greater than 50 ohms for optimal perfor-
mance. The main outputs, both balanced and single-
ended, will be muted when a phone plug is inserted into
the headphone jack (TAPE outputs are not muted). The
front panel indicator LED will not turn red, however, as is
does when the outputs are muted via the MUTE toggle
switch or the hand held remote control.
ANALOG AUDIO INPUTS
BP26 preamplifiers are equipped with five pairs of RCA input
connectors: two pairs of balanced XLR input connectors,
and one pair of RCA tape input jacks.
Balanced inputs use 3 pin XLR female connectors with pin
1 being ground, pin 2 as positive signal, and pin 3 as nega-
tive signal. Input sensitivity is 1 volt and input impedance is
15K ohms.
Single-ended (or unbalanced) inputs employ gold plated
RCA (Phono) jacks. Line input sensitivity is 500mV and input
impedance is 50K ohms. See also PHONO EQUALIZATION
MODULES for Phono input details.
ANALOG AUDIO OUTPUTS
There are two pairs of parallel RCA main outputs and one
pair of RCA tape output jacks. One pair of balanced outputs,
using 3 pin male XLR jacks, are also provided.
Balanced Outputs: As with the input XLR jacks, pin 1 is
ground, pin 2 is positive and pin 3 is negative. These outputs
3