Bryston ST Series - Clipping Indicators; Remote Power Control

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 thermai 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
REMOTE
SELECT ’LOCAL’ WHEN NOT
USING REMOTE POWER CONTROL
DC
OR
AC
4-12V
FRONT PANEL POWER SWITCH
MUST BE ’ON’ WHEN USING
REMOTE POWER FUNCTION.
n
©
I
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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 control
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 all times the power can be turned off by
using the front panel power switch.
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