Phoenix Gold pt1800 - Manual (Page 13)

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8. XLR POLARITY SWITCH
The XLR Polarity Switch conveniently configures both XLR connectors for Pin 3 +, (Pin 2-) or Pin 2 +, (Pin 3-). [the
clear security cover can be installed after switches are set.]
9. INPUT CONNECTORS
The pt2400/pt1800 amplifier comes equipped with XLR and Barrier inputs. The XLR connector is wired in parallel
with the barrier strip connector on each channel. Channel 1 is used to drive both channels in either mono configuration.
10. FAN FILTER
An expanded foam filter is used to keep dust and airborne debris out of the amplifier’s cooling system.
11. OUTPUT BINDING POSTS
Two sets of binding posts for each channel provide a convenient means to connect multiple loudspeaker boxes. The
channels alternate vertically and allow the connection of multiple loudspeaker boxes in the Series Mono Bridged
configuration.
12. GROUND LIFT TERMINALS
These two connections on the barrier strip are provided to help eliminate noise in systems where ground loops are a
problem. For maximum safety during an amplifier fault condition the jumper between chassis and power supply
grounds should remain installed. When using the power supply ground terminal for the control voltage common (-) in
the power sequencing operation, leave the jumper installed.
13. SEQUENCE TERMINALS
Separate SND (send) and RCV (receive) terminals for each channel allow the amplifier to be sequenced on and off
within a system of multiple amplifiers. The two sets of terminals also allow the two channels to be independently
turned on and off from a remote location that can provide a +5 to +15 Voltage source. The jumper connected from the
SND terminal of Channel 1 to the RCV terminal of Channel 2 must be removed for independent operation.
14. AC POWER CONNECTORS
Two positive locking power cords permit connections to AC distribution systems already pre-wired for 12-15 amps per
plug. Dual A.C. power cords facilitate easy installation and removal of the pt2400/pt1800 from the amplifier racks.
15. FUSES
Channel 1 and Channel 2 have independent A.C. line fuses.
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