PRORECK PR18 18-inch 2000W Active Powered PA DJ Subwoofer Cabinet Instruction Manual

1. Introduction

Thank you for choosing the PRORECK PR18 Active Powered Subwoofer. This 18-inch subwoofer is designed to provide powerful bass reinforcement for various audio applications, including parties, bars, weddings, meetings, speeches, churches, gymnastics, conferences, and home theaters. This manual provides essential information for the safe and efficient operation of your subwoofer.

Figure 1: Front view of the PRORECK PR18 Active Powered Subwoofer.

2. Safety Information

Please read and understand all safety instructions before operating this product. Retain this manual for future reference.

• Power Source: Connect the unit only to a power supply of the type specified in this manual or on the unit.
• Ventilation: Ensure proper ventilation. Do not block ventilation openings.
• Water and Moisture: Do not expose the unit to rain or moisture. Do not place objects filled with liquids on the unit.
• Heat: Do not place the unit near heat sources such as radiators, heat registers, stoves, or other heat-producing appliances.
• Servicing: Do not attempt to service this product yourself. Refer all servicing to qualified service personnel.
• Placement: Place the subwoofer on a stable, level surface. Use the pole mount for satellite speakers as intended.

3. Package Contents

The PRORECK PR18 package includes:

• One (1) PRORECK PR18 Active Powered Subwoofer Cabinet

Figure 2: The PRORECK PR18 Subwoofer as packaged.

4. Product Overview

The PRORECK PR18 is an active powered subwoofer designed for robust sound reinforcement. It features an 18-inch low-frequency driver with a 3-inch voice coil, delivering 400 Watts RMS / 800 Watts Program / 2000 Watts Peak power. The unit incorporates a built-in Class-D amplifier for deep stereo sound. Its housing is constructed from plywood with a special impact-resistant material to reduce resonance and ensure durability.

Key Features:

• 18-inch woofer with 60oz magnet and 3" voice coil.
• Balanced XLR combo input and stereo RCA input.
• Stereo RCA output and full range XLR combo output.
• Filtered XLR output for audio signals between 100Hz and 20KHz.
• Selectable phase from 0° to 180° for multiple subwoofer setups.
• Adjustable crossover from 40Hz-160Hz.
• Power-on and max volume indicators.
• Two side handles for easy transport.

Figure 3: Rear panel of the PRORECK PR18 Subwoofer, showing inputs, outputs, and controls.

Figure 4: Internal construction of the PRORECK PR18 Subwoofer, highlighting its plywood build.

5. Setup

5.1 Placement

Position the subwoofer on a stable, flat surface. The unit is equipped with a pole mount on top, allowing for the placement of a satellite speaker (not included) directly above it for an integrated sound system. The two side handles facilitate easy transport and positioning.

5.2 Connections

Refer to Figure 3 for the rear panel layout.

1. Input: Connect your audio source (mixer, DJ controller, etc.) to the subwoofer using either the balanced XLR combo inputs or the stereo RCA inputs. The XLR combo input accepts both XLR and 1/4" TRS connectors.
2. Output:
   • Full Range XLR Output: Use these outputs to send the full audio signal to other subwoofers or full-range speakers.
   • Filtered XLR Output (High Pass): These outputs provide an audio signal with frequencies above 100Hz (up to 20KHz), ideal for connecting to satellite speakers to prevent them from reproducing low bass frequencies.
   • Stereo RCA Output: Provides a stereo RCA signal for connecting to other devices.
3. Power: Connect the power cable to the AC IN port and then to a suitable power outlet. Ensure the power switch is in the OFF position before connecting.

6. Operating Instructions

6.1 Power On/Off

After all connections are made, switch the power button to the ON position. The power-on indicator light will illuminate.

6.2 Controls

The rear panel (Figure 3) features the following controls:

• Volume Knob: Adjusts the overall output level of the subwoofer. Start with a low volume and gradually increase it.
• Crossover Knob (40Hz-160Hz): Sets the upper frequency limit for the subwoofer. Frequencies above this setting will be sent to the filtered XLR outputs. Adjust this to blend seamlessly with your main speakers.
• Phase Switch (0°-180°): Allows you to invert the phase of the subwoofer's output. This is useful for optimizing bass response when using multiple subwoofers or when the subwoofer is positioned at a different distance from the main speakers. Experiment with both settings to find the best sound.
• Indicators: Power-on and max volume (clip) indicators provide visual feedback on the unit's status and signal level. If the clip indicator frequently illuminates, reduce the volume to prevent distortion and potential damage.

6.3 Typical Usage

The PR18 is ideal for enhancing the low-frequency response of any PA system. For optimal performance, ensure the subwoofer's crossover frequency is set appropriately relative to your main speakers. For example, if your main speakers handle frequencies down to 80Hz, set the subwoofer's crossover to around 80-100Hz.

7. Maintenance

Proper maintenance ensures the longevity and optimal performance of your PRORECK PR18 subwoofer.

• Cleaning: Use a soft, dry cloth to clean the exterior of the subwoofer. Do not use abrasive cleaners, waxes, or solvents.
• Storage: When not in use for extended periods, store the subwoofer in a cool, dry place, away from direct sunlight and extreme temperatures.
• Inspection: Periodically check all cables and connections for any signs of wear or damage.
• Housing: The plywood housing with special impact-resistant material is designed for durability. Avoid dropping or subjecting the unit to severe impacts.

8. Troubleshooting

If you encounter issues with your PRORECK PR18 subwoofer, refer to the following common troubleshooting steps:

• No Power:
  • Ensure the power cable is securely connected to both the subwoofer and a working power outlet.
  • Check the power switch on the rear panel is in the 'ON' position.
  • Verify the power outlet is functional by plugging in another device.
• No Sound:
  • Check all audio input and output cables are correctly and securely connected.
  • Ensure the volume knob on the subwoofer is turned up.
  • Verify the audio source (mixer, controller) is sending a signal and its volume is adequate.
  • Check the crossover and phase settings. Incorrect settings might lead to perceived lack of bass.
• Distorted Sound:
  • Reduce the volume on the subwoofer and/or the audio source. The clip indicator should not be constantly lit.
  • Ensure all cables are in good condition and not damaged.
• Rattling Noise:
  • Check for loose screws on the grille or amplifier mount. Tighten if necessary.
  • Ensure no external objects are vibrating against the subwoofer cabinet.

If the issue persists after following these steps, please contact PRORECK customer support.

9. Specifications

10. Warranty

The PRORECK PR18 Subwoofer comes with a One Year Warranty from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal use. Please retain your proof of purchase for warranty claims. For detailed warranty terms and conditions, refer to the documentation included with your product or contact PRORECK customer support.

11. Support

For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact PRORECK customer support through their official website or the contact information provided with your purchase. Always provide your product model (PR18) and proof of purchase when seeking support.