Bryston BP26DA User Manual
Page 5
are capable of driving 30 volts into any load of 600 ohms or
greater. Do not short any of these three pins together!
Single-ended or unbalanced outputs: As with unbal-
anced inputs, these connectors are gold plated RCA
(phono) jacks.
They are capable of driving 15 volts into any
load of 600 ohms or greater.
TAPE LOOP
Tape Outputs: The “TO TAPE” outputs are selected by
the rotary ‘SOURCE” knob and are provided as a record-
ing output. This feed is unaffected by the operation of other
front panel controls.
Tape Inputs: The “FROM TAPE” (unbalanced RCA)
inputs are useful for monitoring tape playback or pro-
cessed signals. Moving the “Tape/Source” toggle to Tape’
(up) position monitors the recorded signal on recorders
equipped with a separate playback head, or the processed
signal when using a signal processor. Input sensitivity is
500mv, input impedance is 10K ohms.
REMOTE CONTROL
The Bryston model BP26 preamplifier is
supplied with a hand held infra-red remote
control unit. The remote features include
volume control, mute and polarity (or signal
phase). All remote control functions may
be operated manually from the front panel
of the preamplifier if desired.
Volume is remotely controlled via
the ▲ (up)
and ▼ (down) arrow buttons.
A motorized volume control ensures the
lowest distortion with maximum long term
reliability. It is also manually accessible on
the front panel.
The
Phase switch (or the “Polarity/Invert” toggle switch
on the front panel) allows you to reverse the absolute phase
of the audio signal (not to be confused with the left-versus-
right channel phase), because polarity reversal can occur
in the recording chain. It is desirable to maintain absolute
phase as originally played in the recording hall as that will
provide the most accurate representation of the original
wave front. This may be audible in some cases as a more
realistic rendition of musical transients when the preampli-
fiers maintain non-inverting polarity at the Main output for
all inputs when the pilot light (or status LED) is green. The
polarity is inverted when the status LED is yellow. The “To
Tape” outputs are always non-inverted.
The
Mute control mutes the main outputs (both bal-
anced and unbalanced) of the preamplifier, but not the
tape outputs (labeled “To Tape”). Refer also to the Power
Supply section earlier in this manual for information regard-
ing remote amplifier control (on/off) via the mute switch
PHONO EQUALIZATION MODULES (optional):
Bryston’s optional phono equalizer circuitry features highly
accurate equalization, extremely low noise and distor-
tion and provides headroom margins sufficient to prevent
overload from any known phono source. If your turntable
provides a separate ground lead system noise may be mini-
mized by connecting it to the ground post adjacent to the
phono inputs on the rear panel.
Moving Magnet Phono Cartridge Input (MM):
This is Bryston’s standard RIAA phono equalization stage. It
is found in both the “-P” and “-MC” versions of the BP26 pre-
amp. Input impedance is 50K ohms and sensitivity is 5mV.
Moving Coil Phono Cartridge Input (MC):
Moving coil phono cartridges require much more gain than
the more common moving magnet types. To accommodate
moving coil cartridges Bryston offers the BP26MC pre-amp
which include specially designed, custom made step-up
transformers in addition to Bryston’s standard RIAA phono
equalization stage found in the “-P” versions of the BP26
pre-amp. Which phono equalization stages are engaged
is determined by the front panel toggle switch labeled “MC
Phono / MM Phono”. This switch is not present on the
BP26P model; it is replaced, instead with a “Mono / Stereo”
switch. Please note that it is important that your phono car-
tridge is connected to the correct inputs in order to achieve
proper performance.
Input impedance is 180 ohms and sensitivity is 350uV.
DIGITAL AUDIO INPUT MODULE (Optional):
The BP26DA model contains two SPDIF compatible digital
audio inputs. To select either the DAC-1 or DAC-2 digital
audio input, first set the rotary SOURCE selector to DAC,
and then select between the two SPDIF inputs with the
DAC-1/ DAC-2 toggle switch. The digital-to-analog conver-
tor can handle input sample rates from 16KHz to 108KHz,
and word lengths of 16, 18, 20 or 24 bits.
VISUAL INDICATORS:
MPS2 Power Supply: The LED on the front panel of the
MPS2 lights GREEN when power is on.
BP26 Preamp: The three colour LED (light emitting
diode) located on the front panel lights RED when the out-
put is muted, GREEN when the output signal is non-invert-
ing polarity and YELLOW when the output signal is invert-
ed with respect to the input. When the LED is unlighted,
the power is off.
BP26 Preamplifiers
4
PREAMP REMOTE CONTROL