Precision Power PCX1250 manual Q BASS Settings

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™ dash mounted level control. Adjust the level control clockwise for up to +18dB of boost at your selected frequency.

Q BASS™ Settings

1	2	Freq.
IN	IN	30Hz
IN	OUT	36Hz
OUT	IN	44Hz
OUT	OUT	60Hz

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.

PrecisionPowerPCX™ amplifiers no longer need an optional QPORT™ to connect multiple QBASS PLUS™ equipped amplifiers while using one QBASS 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 PrecisionPower Dealer for more information! (See diagram pg.18)

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.

Both excessive temperature and low impedance (or short circuit) conditions will activate the amplifier'sAM-Vprotection circuitry, which turns down the amplifier's output. When the amplifier cools down, or the impedance is corrected, the AM-Vwill 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.

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