Bass Settings | Precision Power PCX1250 manual

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.

PCX1250 specifications

The Precision Power PCX1250 is an impressive monoblock amplifier designed for both car audio enthusiasts and professional sound installers. With its robust construction and state-of-the-art technology, it stands out in the competitive world of automotive audio equipment.

At the core of the PCX1250 is its powerful 1250-watt maximum output, providing ample power to drive even the most demanding subwoofers. The amplifier's class D topology ensures high efficiency, minimizing heat generation while maximizing audio performance. This means that users can enjoy loud, clear sound without worrying about overheating during extended use.

One of the standout features of the PCX1250 is its variable low-pass filter, which allows users to customize the sound to their preference. This filter plays a critical role in enhancing the bass response and ensuring that the subwoofer produces clean, undistorted low frequencies. The low-pass filter can be adjusted between 40Hz and 200Hz, giving users the flexibility to dial in the perfect setting for their specific system.

Convenience is another hallmark of the PCX1250. The amplifier is equipped with adjustable gain control, which lets users set the input sensitivity to match the output of their head unit or other source. This helps to prevent distortion and ensures that the audio maintains its clarity, even at higher volume levels.

Additionally, the PCX1250 features a built-in thermal protection circuit and a short-circuit protection system, which safeguard the amplifier from damage under adverse conditions. The power and ground terminals are designed for easy installation, with substantial gauge inputs that can handle high current levels without compromising performance.

In terms of design, the PCX1250 boasts a sleek and modern aesthetic, featuring a durable aluminum casing and stylish accents. Its compact size allows for flexible installation options, fitting comfortably in various vehicle layouts without sacrificing performance.

Overall, the Precision Power PCX1250 is an exemplary amplifier that combines power, performance, and versatility. With its robust features and cutting-edge technology, it is an excellent choice for anyone looking to elevate their car audio experience. Whether driving a single subwoofer or a full sound system, this amplifier delivers impressive sound quality, making it a top pick among audio aficionados.