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3-PYRAMID XPA-100/XPA-200/XPA-300 Amplifier Owner’s Manual PYRAMID XPA-100/XPA-200/XPA-300 Amplifier Owner’s Manual-4
Connecting to standard AC power
After making all other connections, set the POWER switch
to OFF position. Then connect the power cord to a standard
AC outlet.
Mounting the amplifier
This amplifier is designed to accept standard rack mounting
installations. Two slots on each end of the front panel make
it suitable for such an installation.
Tightly secure four mounting screws (not supplied) through
these fours slots and into your standard electronics equipment
rack.
Turning the amplifier on
1. Turn on the audio input source equipment which is
connected to the amplifier INPUT jacks.
2. Set the amplifier’s Channel 1 and Channel 2 output level
gain controls to the minimum level settings.
3. Push in the power switch to turn the amplifier on.
Using the power LED meters
The meter pointer position indicates the amplifier output
power. For ease of reading in dark environments, the meter
is illuminated.
Bridged Mode Operation
This amplifier can operate in a mono bridged output mode, if
your speakers can handle the following power output levels:
XPA-100: 1000 watts
XPA-200: 1600 watts
XPA-300: 2000 watts
As shown in the diagram below, connect the speaker's positive
(+) to the amplifier's red speakers left (1/2) terminals and
negative (-) to red speakers right (1/2) terminals.
The speaker right (+) on the amplifier is used as a negative (-)
terminal for a bridged connection.
NOTE: The extra amplifier output of 6.35mm phone
jacks can not be used for the bridged connection. It can only
be used in normal (non-bridged) operation as a stereo speaker
output.
Using the Channel 1 and Channel 2 Output Level controls
Rotate output level gain clockwise to increase, or counter-
clockwise to decrease the output power. To get the best
performance with the least sound distortion, always adjust
the output level gain so the meter's pointer does not
continuously exceed the extreme right of the meter's scale.
CAUTION: It is possible to overdrive the amplifier by
setting output level gain too high, which may cause
damage or failure.
About the internal protect circuitry
Special clip circuitry incorporated into your PYRAMID XPA
amplifier’s design protects the amplifier and speaker system
from being damaged from overdriving power.
Under normal conditions, the amplifier’s clip indicator will
flicker as the output power momentarily exceeds the level
as set by the output level gain selector.
However, under excessive output conditions, the protect
indicator lights remain on continuously, alerting you that
the special clip circuitry has become active. When this
occurs, you should simply reduce the output power level
by rotating the Master Volume control counterclockwise.
SWITCH IN “MONO” POSITION
USE
CHANNEL 1
INPUT ONLY
MONO OPERATION
USE
CHANNEL 1
INPUT ONLY
SWITCH IN “BRIDGED” POSITION
MONO BRIDGED OPERATION
CAUTION! Do not use
balanced and unbalanced
inputs simultaneously!!
CAUTION! Do not use
balanced and unbalanced
inputs simultaneously!!
CH 2
CH 1
DO NOT USE
BLACK TERMINALS