NBVOICE PRX ONE 15-inch Stage PA Speaker System Instruction Manual

1. Introduction

The NBVOICE PRX ONE is a professional-grade 15-inch Stage PA Speaker System designed for high-performance audio applications. This system delivers 2400W peak power and crystal-clear 131dB audio, suitable for venues up to 5,000 sq.ft. Featuring a 15-inch subwoofer, proprietary ArrayShade technology, Bluetooth DSP control, and a road-ready birch enclosure, it ensures exceptional sound quality and durability. This manual provides essential information for the safe and effective setup, operation, and maintenance of your NBVOICE PRX ONE system.

2. Safety Information

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

• Power Supply: Connect the unit only to a grounded AC power outlet of the correct voltage.
• Ventilation: Ensure adequate ventilation around the unit. Do not block ventilation openings.
• Moisture: Do not expose the unit to rain or moisture. Avoid placing liquid-filled objects on the unit.
• Heat: Keep the unit away from heat sources.
• Servicing: Refer all servicing to qualified service personnel. Do not attempt to service this product yourself.
• Hearing Protection: Prolonged exposure to high sound pressure levels can cause permanent hearing damage. Use appropriate hearing protection when operating the system at high volumes.

3. What's in the Box

Verify that all components are present upon unboxing:

• 1x 15" Active Subwoofer
• 3x 4" Array Speakers (6 tweeters)
• 1x Telescopic Stand (78"-84" adjustable)
• 1x Telescopic Bracket
• 4x Spare Universal Wheels
• Necessary Power and Speaker Cables

4. Setup

Follow these steps to assemble and connect your NBVOICE PRX ONE system:

1. Attach Universal Wheels: Secure the 4 universal wheels to the bottom of the 15" active subwoofer for easy mobility.
2. Install Telescopic Stand: Screw the telescopic stand into the designated mounting point on top of the subwoofer. Adjust the height as needed.
3. Assemble Array Speakers: Connect the three 4" array speakers to the telescopic bracket. Ensure they are securely fastened.
4. Connect Speaker Cables: Use the provided short speaker cables to link the array speakers to each other, then connect the bottom array speaker to the subwoofer's speaker output.
5. Power Connection: Connect the power cable to the subwoofer and then to a grounded AC power outlet.

Figure 4.1: Line Array Speaker Assembly Steps. This image illustrates the four main steps for assembling the speaker system: installing three speakers, installing speakers to brackets, installing the bracket pole to the subwoofer, and connecting audio cables.

Figure 4.2: Space-Saving Stack Industrial Casters. This image highlights the industrial casters on the subwoofer, emphasizing its portability and ease of movement.

5. Operating Instructions

Familiarize yourself with the control panel and various input options:

5.1. Control Panel Overview

Figure 5.1: Control Panel. This image displays the rear control panel of the subwoofer, showing inputs for CH1/CH2 (Mic/Line), BT Level, DSP Mode selector, and various output options.

5.2. Power On/Off

Locate the power switch on the rear control panel of the subwoofer. Flip the switch to the 'ON' position to power on the system. Flip to 'OFF' when not in use.

5.3. Audio Input Connections

• Microphone/Line Inputs (CH1/CH2): Use XLR or 1/4" TRS cables to connect microphones or line-level devices (e.g., mixing desks, musical instruments). Adjust the corresponding CH1/CH2 Level knobs. Ensure the 'MIC/LINE' button is pressed for microphone input or released for line input.
• Auxiliary Inputs: Connect devices via RCA or 3.5mm AUX inputs.
• USB Playback: Insert a USB flash drive into the USB port for direct audio playback.

5.4. Bluetooth Connectivity

The system supports Bluetooth 5.3 for wireless audio streaming up to 30m.

1. Activate Bluetooth: Press the 'PAIRING' button on the control panel. The Bluetooth indicator light will flash.
2. Pair Device: On your smartphone or tablet, search for 'NBVOICE' in the Bluetooth settings and select to pair. The indicator light will become solid once connected.
3. Adjust BT Level: Use the 'BT Level' knob to control the volume of the Bluetooth audio.

Figure 5.2: Bluetooth Connection. This image demonstrates a smartphone wirelessly connected to the speaker system via Bluetooth, with the Bluetooth indicator light illuminated.

5.5. DSP Mode Selection

The built-in Dual-Mode DSP processor offers 4 preset modes to optimize sound for different applications:

• Normal: Standard sound profile for general use.
• Monitor: Optimized for stage monitoring.
• Playback/DJ: Enhanced bass and treble for music playback and DJ sets.
• Speech: Clear vocal reproduction for presentations and speeches.

Rotate the 'DSP MODE' knob to select the desired sound profile.

Figure 5.3: Bluetooth DSP Control. This image focuses on the DSP section of the control panel, showing the DSP Mode selector and Bluetooth pairing options.

5.6. TWS (True Wireless Stereo) Pairing

For a true stereo experience, you can pair two NBVOICE PRX ONE systems wirelessly:

1. Ensure both systems are powered on and Bluetooth is enabled on both.
2. On one system (Master), press and hold the 'TWS LINK' button until the indicator light flashes.
3. On the second system (Slave), press the 'TWS LINK' button briefly.
4. The systems will automatically pair. The 'TWS LINK' indicator lights on both units will become solid when connected.

Figure 5.4: Dual Speaker Symphony. This image visually represents two NBVOICE PRX ONE systems set up for a stereo sound experience, highlighting the TWS capability.

6. Maintenance

Proper maintenance ensures the longevity and optimal performance of your NBVOICE PRX ONE system.

• Cleaning: Use a soft, dry cloth to clean the exterior surfaces. Do not use abrasive cleaners or solvents.
• Storage: Store the system in a cool, dry place away from direct sunlight and extreme temperatures.
• Inspection: Regularly inspect cables and connections for any signs of wear or damage. Replace damaged components immediately.
• Durability: The 18mm birch plywood enclosure and scratch-resistant steel grilles are designed for road-ready durability, surviving 100-hour pressure tests.

Figure 6.1: Road-Ready Durability. This image emphasizes the robust construction of the speaker system, built with 18mm birch plywood for enhanced durability.

7. Troubleshooting

If you encounter issues with your NBVOICE PRX ONE system, refer to the following common troubleshooting steps:

• No Power: Check the power cable connection to both the unit and the outlet. Ensure the power switch is in the 'ON' position.
• No Sound: Verify all audio cables are securely connected. Check input source volume and the master volume on the control panel. Ensure the correct input channel is selected.
• Distorted Sound: Reduce the input volume from your source device and the channel level on the speaker. Check for damaged cables.
• Bluetooth Connection Issues: Ensure the 'PAIRING' light is flashing or solid. Try unpairing and re-pairing your device. Ensure your device is within the 30m range.
• Feedback: Utilize the automatic feedback suppressor feature on the DSP control. Adjust microphone placement and volume levels.

8. Specifications

Figure 8.1: Innovative Acoustic Structure. This image details the speaker components, including 6x 4" mid-high frequency speakers, 3x 1" horn tweeters, and a 1x 15" subwoofer, highlighting the system's acoustic engineering.

9. Warranty

The NBVOICE PRX ONE Stage PA Speaker System is backed by a 7-year warranty, which is three times the industry average. This warranty covers manufacturing defects and ensures long-term reliability.

For specific warranty details and claims, please contact the seller directly or refer to the manufacturer's official website.

10. Support

For further assistance, technical support, or inquiries regarding your NBVOICE PRX ONE system, please contact NBVOICE customer support through the platform where you purchased the product or visit the official NBVOICE website for contact information.