Control Definitions

Alrighty, here comes the fun stuff. We’re going to break this down to it simplest form so that there is no way you can possibly do any damage in the installation process to your audio system. We’re going to explain in detail how every single knob and switch work rather than turn you loose on a sophisticated amplifier and have problems. READ EVERYTHING!

Trust us, it’ll be worth it… Before you do anything, undo the ground cable from the battery.

Power Terminal Block

GND – This is the Ground connection. Bolt the Ground cable to a bare metal part of the chassis/ frame. Do NOT us self-tapping screws or seat/seatbelt bolts!

+12V – This is the Power Connection. This cable gets connected directly to the battery. You MUST use a fuse holder or circuit breaker within 18” of the battery. All cables ran through the firewall must be protected by a rubber or plastic grommet. If you have multiple amplifiers, the main fuse or circuit breaker at the battery should be the sum of all fuses or slightly less.

REM – This is the remote Turn-On connection. Connect to the amplifier output or power antenna output of the source unit. If the unit does not have a switched +12V output, you can use another switchable +12V.

Speaker Terminal Block

This is the Speaker(s) Connection. All components, coaxials and subwoofers connect here.

Crossovers

These controls allow you to pass and block frequencies to each driver. This is one of the most important parts of tuning any audio system.

LOW PASS – This control allows you to pass only frequencies lower than the frequency you choose to the drivers. For example, if you are powering a sub woofer and you choose 70Hz, then only 70Hz and lower tones will be passed through to the subs while all unwanted higher frequencies above 70Hz will be blocked.

HIGH PASS - This control allows you to pass only frequencies higher than the frequency you choose to the drivers.

High Pass crossover filters below 50Hz are also considered “subsonic” filters.

Multiplier Switches – Sometimes you may need a range that is not within the range supplied by the control potentiometer. In this case, if the amplifier has a multiplier switch, the range can change to accommodate your needs. For example, let’s say you have a 4 channel amplifier and you want to put the tweeters (1”) on the front channels and the midbass (6.5”) on the rear channels, and use all electronic crossovers. You can set the High Pass for the tweeters at 4kHz. The low pass, if it as two ranges, may be from 50-800Hz which is not high enough. By using the multiplier switch, that same control can change the range from 50Hz-800Hz to 250Hz-4kHz. If this doesn’t make sense and you do not understand frequencies clearly, PLEASE TAKE YOUR AMP TO A PROFESSIONAL PRECISION POWER DEALER!

Bass EQ – This circuit allows you to choose a frequency between 30Hz and 90Hz and boost that frequency by 0-12dB.

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Precision Power PC400.4, PC740.5, PC650.2, PC640.4, PC360.2, PC1000.1 owner manual Control Definitions
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PC650.2, PC640.4, PC360.2, PC740.5, PC1000.1 specifications

Precision Power is renowned for its high-quality audio amplification products, and their lineup features various models like the PC400.4, PC1000.1, PC740.5, PC360.2, and PC640.4. Each model is tailored to meet the diverse needs of car audio enthusiasts, offering powerful performance, innovative technologies, and solid construction.

The PC400.4 is a versatile four-channel amplifier that excels in delivering crisp and clear sound. It features a durable aluminum chassis, ensuring efficient heat dissipation and longevity. With an impressive output of 100 watts per channel at 4 ohms, this amplifier ensures your speakers receive ample power for an enhanced audio experience. Its built-in crossover network allows for seamless integration with subwoofers or additional speakers, making it an ideal choice for anyone looking to build a high-quality audio system.

For those seeking serious power, the PC1000.1 is a monoblock amplifier capable of delivering a staggering 1000 watts at 1 ohm. This model includes advanced technologies such as a variable low-pass filter and bass boost, allowing users to customize their sound according to their preferences. The Class D design of the PC1000.1 ensures high efficiency, which translates into less heat generation and more power handling. This model is perfect for driving subwoofers and will truly elevate your audio experience.

The PC740.5 is a five-channel amplifier designed for users who want to power an entire system with one unit. With 75 watts per channel for four channels and a robust 300 watts for the subwoofer channel, the PC740.5 packs a punch. Its integrated electronic crossovers allow for precision tuning, ensuring that each component in your system works harmoniously together. This amplifier is ideal for those looking for a compact solution that doesn’t compromise on power.

Next in line, the PC360.2 model offers a two-channel configuration suited for those who want to power stereo speakers or use it in a bridged mode for subwoofers. It provides 90 watts per channel at 4 ohms, delivering dynamic sound and impressive clarity. The robust construction and reliable performance of the PC360.2 make it a solid choice for any audio setup.

Lastly, the PC640.4 is another four-channel option that combines flexibility and power. With 100 watts per channel at 4 ohms, it is perfect for powering multiple speakers without sacrificing quality. It features adjustable crossovers and EQ controls, allowing users to fine-tune their audio experience.

In summary, the Precision Power amplifiers PC400.4, PC1000.1, PC740.5, PC360.2, and PC640.4 exemplify high performance, versatility, and user-friendly features, making them excellent choices for anyone passionate about sound quality in their vehicle.
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