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Q BASS™ Settings
1 2 Freq.
IN IN 30Hz
IN OUT 36Hz
OUT IN 44Hz
OUT OUT 60Hz
On the PCX 1500 amplifier, we've taken bass control to a higher level with
QBASS PLUS™. The two QBASS™ switches (labeled 1 and 2) on the front end
of the amplifier allow you to select one of four frequency centers 30Hz, 36Hz,
44Hz and 60Hz, with a Q-Factor of 2. On the rear end plate you will find the
QBASS™ level control and the plug-in for an optional QBASS REMOTE™ d a s h
mounted level control. Adjust the level control clockwise for up to +18dB of
boost at your selected frequency.
CAUTION: QBASS PLUS™ should only be used in systems with a strong subwoofer
section. +18dB is a tremendous amount of bass boost and may damage your
speakers if abused.
Optional QBASS REMOTE™: This boost control can be mounted in the dash and
will supersede the boost control on the endplate.
P r e c i s i o nP o w e rP C X ™ amplifiers no longer need an optional Q P O RT ™ to connect
m u l t i p l e QBASS PLUS™ equipped amplifiers while using one Q B A S S
REMOTE™. The new QBASS PLUS™ circuitry in the PCX™ amplifiers is now
positioned before the crossover circuit. In doing this, PrecisionPower engineers
have allowed you to daisy chain your RCAoutput to the next amplifier input, causing
the first amplifier’s Q BASS Remote™ to become the master control amplifier. See
your Authorized PrecisionP o w e r D e a l e r for more information! (See diagram pg.18)
4
Both excessive temperature and low impedance (or short circuit) conditions will
activate the amplifier's A M - V protection circuitry, which turns down the amplifier's
output. When the amplifier cools down, or the impedance is corrected, the A M - V
will restore full power. If your amp is turning down, check your speakers and wiring
for low impedance and short circuits. Also, ensure that there is nothing blocking
the normal convective airflow of the amplifier. No obstruction should be within 2"
of the amplifier on all sides.
NOTE: Low battery voltage will cause the amplifier to run warmer and
possibly damage the amplifier.
17
Short Circuit Protection engaged: The amplifier will turn off and try to come
back on immediately. The amplifier will cycle like this indefinitely, with "blips" of
sound each time. If this is the case, check your speakers and wiring for low
impedance and short circuits.
Thermal Protection engaged: The amplifier will turn off and several minutes
later will come back on. In this case, ensure that there is nothing blocking the
normal convective airflow of the amplifier. No obstruction should be within 2" of
the amplifier on all sides.
NOTE: Low battery voltage will cause the amplifier to run warmer and
possibly damage the amplifier.