BRYSTON POWERPAC 60/120/300
Grounding and Ground LIft Switch (except PP300 and PP120):
Input and Output Connectors:
Bryston PowerPac amplifiers come
standard with two input connectors: one un-
balanced RCA/phono connector and a bal-
anced combination XLR - 1/4-inch jack with
fully discrete active input circuitry.
All input connectors are gold-plated
and should only be used only with high-
quality, gold-plated interconnect cable as a
poorly plated connector will eventually cor-
rode through the gold flash.
Bryston offers interconnect cables
with heavily gold plated, quality connectors
available through any Bryston authorized
dealer or directly from Bryston.
Output connectors consist of one
pair of five-way binding post terminals (1
red and 1 black) that can accept either
standard banana plugs, spade lugs, pins or
bare wire. Since the binding posts are gold-
plated, we recommend gold plated connec-
tors also be used on the speaker cables.
All Bryston amplifiers will accept bal-
anced or single-ended (RCA) input connec-
tors. The balanced inputs use combination
3-pin XLR (pin-1-ground), (pin-2-+) and
1/4-inch tip-(+), ring and sleeve (ground)
input connectors.
A ground lift switch is located on the
front panel of the amplifier. It is connected
between the chassis ground (including the
third prong on the power cord) and the signal
ground.
This switch is normally left in the con-
nected (up) position. Occasionally a multi-
amplifier installation or an unusual grounding
situation with another component (CD player,
video recorder, television etc.) will cause a
ground loop between the signal ground and
the chassis ground. This switch will reduce
the resultant hum in many cases without re-
sorting to a “ cheater plug ” by switching to
the separated (down) position.
Note: this switch does not disconnect the
chassis from the third prong on the power
cord which must be left intact for safety
reasons.
Power Clipping Indicator
Dual colour LED pilot lights indicating GREEN at normal level, flashing RED at clipping.