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Model PA635X
© 2001 Xantech Corporation
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They flash Amber 5 times during power up, then turn steady Green when Power On Mute releases. This
action occurs whether the unit is powered ON by the POWER switch (item # 3) or by a DC voltage applied to
the REMOTE MASTER ON/OFF CONTROL terminals (item #10). Be sure the rear panel master AC LINE
ON/OFF Switch, item #13, is set to the ON (I) position for the above to occur.
5. Line
Inputs
. These RCA-type jacks are the audio inputs for each of the amplifier pairs. Connect them to the
OUTPUT jacks of the driving preamp with good quality RCA-type patch cables. Note that the inputs are marked
LEFT-1-RIGHT, LEFT-2-RIGHT, etc., signifying the stereo channel pairs. Both the LEFT and RIGHT jacks are
also active when the MODE switch (item #7) is set to the MONO or BRIDGED mode.
6. Input
LEVEL Control
. This screwdriver adjustable control (for each stereo or bridged pair) allows the input level
for full rated power output to be adjusted over a range of 0.2 volts to 3 volts (24.3 dB). Normally you would adjust
the driving preamp to max. volume, then set this control to the maximum volume that the client desires for a given
zone or room. This prevents the system from being driven to potentially destructive power levels.
7. MODE
Switch
. Switches the amplifier pair between
STEREO
,
MONO
and
BRIDGED
modes.
a)
In
STEREO
mode, the two amplifiers operate independently of each other for 35 Watts of output each, except
IR control of Volume, Max-V, Mute, Standby OFF/ON and Balance functions is common to both.
b)
In
MONO
mode, left and right input signals are summed internally for Mono output from each of the two
amplifiers. Also, either the Left or Right (item #5) input may be used if the source is already a Mono signal.
c)
In
BRIDGED
mode, the two amplifiers are bridged for a single channel of high power output (150 Watts @ 8
Ohms). Either the Left or Right input (item #5) may be used to drive the resultant single channel amplifier.
CAUTION
: Be sure to have the POWER turned OFF when changing the position of this switch and when making
the corresponding speaker connection changes (see also item #9, following).
8. FUSE
. When required, replace only with a fuse of the same type and rating:
•
120 V Version: 6.25 AMP 250 VAC, SLOW BLOW.
•
240 V Version: 3.15 A Time-Lag 250 VAC.
•
Replacement with a fuse of higher rating will not protect the amplifier and will void the warranty.
9. SPEAKER
Terminals
. These plug-in 4-terminal screw type connectors permit speaker wire sizes up to 12
gauge. When making connections for the STEREO mode, be sure to observe the "+” and "–" polarity markings,
just under the LEFT & RIGHT markings, for each wire pair going to the speakers.
CAUTION: When making connections for the BRIDGED mode, remember, only one speaker is being attached
per amplifier pair. Be sure to observe the outer "+” and "–" polarity markings on each side of the word
"BRIDGED" on the panel above the 4-terminal connector when connecting the 2-conductor wire to the speaker.
10. REMOTE MASTER ON/OFF CONTROL
. This 2-terminal connector allows the entire PA635X to be powered ON
and OFF by a control voltage ranging between 5 and 30 Volts DC (16mA @ 12 V). Be sure to observe the
marked polarity. For instance, the 12 volt common CO (Control Output) of the Xantech ZPR68 preamp will power
the PA635X ON and OFF automatically with the first zone ON and last zone OFF commands. The DC Voltage
must be applied continuously to retain the ON condition and drop to less than 0.5 Volt to switch to the OFF
condition.
NOTE: The front panel POWER switch (item #3) must be left in the Manual OFF (Out) position and the
Master AC Line Switch (item #13) set to ON (I) to permit the REMOTE MASTER ON/OFF CONTROL to
operate. See also CAUTION notes, Fig. 9.
NOTE:
When powering up multiple PA635X’s, a delay of two (2) or more seconds should be incorporated
between “power on” using multiple Xantech AC2’s.