INST
ALLA
TION
OUTPUT ASSIGNMENT
PIN 1+ :
PIN 1- :
SIGNAL
GROUND
LINK A
LINK B
INPUT A
INPUT B
Push To Reset
~220
240V 10A 50/60Hz
OUTPUT A
OUTPUT B
BRIDGE
PIN1:
PIN2:
PIN3:
SIGNAL GND
SIGNAL +
SIGNAL -
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
OFF
80Hz
110Hz
LOW PASS -A
OFF
35Hz
80Hz
HIGH PASS -A
26dB
32dB
1.4V
GAIN
STEREO PARALLEL BRIDGE
MODE
STEREO
MODE
OFF
35Hz
80Hz
HIGH PASS -B
OFF
80Hz
110Hz
LOW PASS -B
ON
OFF
LIMITER
LIFT
GROUND
GROUND
DESIGNED BY QUEST ENGINEERING,AUSTRALIA
MODEL:
Stereo Operation
System con
fi
guration diagrams
each other. The A channel handles the positive voltage
swing and the B channel becomes the negative, thus
doubling the output voltage swing. Via the “bridge
output” speaker connector, the speaker is now
connected across the two channels.
Power is proportional to the square of the voltage
swing, so four times the output power is possible. The
reality is that this would exceed the capability of the
output stage but a considerable increase in output will
result all the same.
Caution: In this mode output voltages are high
enough to constitute a shock hazard.
Wiring will need to conform to CLASS 1 wiring
standards. Check your local electrical codes for the
appropriate electrical standards.
Output is via the middle Speakon connector. The
output signal is across pins number 1+,1-.
ALWAYS SWITCH OFF AMPLIFIER BEFORE
OPERATING BRIDGE SWITCH
The minimum load impedance in bridge mono
mode is 8
Ω
2+
2-
1+
1-
3. SPEAKON CONNECTOR WIRING
3. Speakon input and output connector wiring.
QA
SERIES
User Manual
User Manual
QA
Series
Power Amplifiers
9
