Bryston 9B ST - Manual (Page 4)

BRYSTON 9B ST MANUAL
Clipping indicators:
All Bryston amplifiers use bicolor LEDs with
green indicating power on and flashing red indi­
cating actual overload or distortion. Upon power-
up the 9B’s LED’s will remain “red” until all volt­
ages stabilize and the unit comes out of mute
and the LED turns green.
If the LED indicator contains a substantial red
content, when program is present, it should be
considered as a sign that the level is too high and
may cause speaker damage if it continues. It
should be remembered that the Bryston ST se­
ries are powerful amplifiers, and that it is possible
to damage almost any speaker if an amplifier is
used in a thoughtless or abusive manner. Brys­
ton will not be responsible for damage caused in
this manner.
The clip-sensing circuit uses an AC comparator
to detect any source of signal distortion including
clipping, short circuits in cabling, excessive DC or
supersonic signals, whether at the input or out­
put. Most conditions which could cause the red
LED to light for more than a moment or two can
be dangerous to your loudspeakers and should
be corrected immediately.
If a specific LED remains “red" without signal
present, it may indicate a thermal overload
condition and the channel is shut down until
safe operating temperatures return.
Bryston 9B ST Remote Power Control - THX units only
r REMOTE POWER CONTROL^
LOCAL
h
:
REMOTE
SELECT 'LOCAL' WHEN NOT
USING REMOTE POWER CONTROL
DC -I
OR
AC
4-12V
FRONT PANEL POWER SWITCH
MUST BE 'ON' WHEN USING
REMOTE POWER FUNCTION.
The 9B ST remote power control
function allows the user to link the
power on/off of the 9B to an exter­
nal
preamplifier, processor, or
other control device. This is useful
in installations, such as home the­
ater, for powering up multiple am­
plifiers, often at distant locations
from the source.
Located on the back panel of the
9B ST is a two screw terminal
input connector. The amplifier
can be powered-up by applying
4-12 Volts (AC or DC of either
polarity) connected to the termi­
nals of the jack. This jack will
accept 1/4 inch stripped wire
ends, inserted into the square
holes provided, and the adjacent
screws carefully tightened to
hold them in place. The input
current remains at less than 3
ma regardless of voltage, there­
fore 22 Ga wire is sufficient.
The front panel power switch must be left in
the "on" position (in), at all times for the am­
plifier to operate in remote power control
mode.
In ‘REMOTE’ position the amplifier can only
be turned on by applying a remote controi
voltage of 4-12 volts.
In the ‘LOCAL’ position the amplifier will not
respond to remote control voltage, only the
front panel power switch.
At aii times the power can be turned off by
using the front panel power switch.
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