FULODE DP-26 Professional Digital Audio Processor User Manual

Introduction

The FULODE DP-26 is a high-performance, 1U rack-mountable digital audio processor designed for professional sound reinforcement systems, including line array applications. It integrates multiple essential audio functions into a single unit, such as crossover, equalizer, limiter, delayer, and filter. This comprehensive system offers precise control over audio signals, ensuring optimal sound quality and system management.

The DP-26 is engineered for ease of use, allowing configuration via its intuitive front panel controls or dedicated PC control software. Its robust design and advanced digital signal processing capabilities make it an ideal solution for demanding audio environments.

Figure 1: Front and Rear Panels of the FULODE DP-26

This image displays the front and rear panels of the FULODE DP-26. The front panel features an LCD display, control knob, function keys, and LED level indicators for inputs and outputs. The rear panel shows the power input, cooling fan, RS232 and RS485 ports, USB port, and XLR input/output connectors.

Setup Guide

This section provides instructions for connecting and initially setting up your FULODE DP-26 digital audio processor.

1. Power Connection

• Ensure the DP-26 is switched off before connecting power.
• Connect the provided power cable to the power socket on the rear panel of the DP-26.
• Plug the other end of the power cable into a suitable AC power outlet (110V/60Hz or 220V/50Hz, depending on your region and unit specification).

2. Audio Connections

The DP-26 features 2 input channels and 6 output channels, all utilizing balanced XLR connectors for professional audio signal integrity.

• Inputs: Connect your audio source devices (e.g., mixing console, preamplifier) to the INPUT A and INPUT B XLR connectors on the rear panel.
• Outputs: Connect your power amplifiers or other audio destination devices to the OUTPUT 1 through OUTPUT 6 XLR connectors.

3. Computer Connection (Optional)

The DP-26 offers multiple interfaces for computer control, allowing for advanced configuration and management.

Figure 2: Available Connection Methods

This diagram illustrates the three primary connection methods for the FULODE DP-26: USB, RS232, and RS485. Each icon represents a different interface for connecting the processor to a computer or network for control and configuration.

• USB Connection: For direct connection to a single computer, use a standard USB cable to connect the USB port on the front panel of the DP-26 to your computer. This allows for easy configuration using the PC control software.
• RS232 Serial Port: Connect a serial cable from the RS232 port on the rear panel to your computer's serial port (or a USB-to-serial adapter). This provides an alternative direct control method.
• RS485 Connection: For controlling multiple DP-26 units (up to 250 machines) or for long-distance control (over 1500 meters), use the RS485 interface. Connect the RS485 ports of the units in a daisy-chain configuration to a suitable RS485 converter connected to your computer.

After connecting, install the dedicated PC control software on your computer. The software provides a graphical interface for comprehensive control over all DP-26 functions.

Figure 3: PC Control Software Interface

This image shows the FULODE DP-26 connected to a laptop, displaying the PC control software interface. The software allows for detailed adjustment of parameters such as 31-band equalization, 10-segment PEQ for inputs and outputs, and high/low pass filters, providing a visual representation of the audio signal path and settings.

Operating Instructions

The FULODE DP-26 offers extensive control over audio processing. This section details its key operational features.

1. Digital Signal Processing (DSP)

The DP-26 utilizes a 32-bit DSP processor with a 96KHz sampling frequency and 24-bit A/D and D/A conversion, ensuring high-fidelity audio processing.

Figure 4: High-Speed Digital Signal Processing

This image highlights the core digital signal processing capabilities of the DP-26, featuring a 255MHz main frequency, 96KHz sampling frequency, 24-bit A/D and D/A conversion, and a 32-bit DSP chip, all contributing to precise and accurate audio manipulation.

Each input channel features a 31-segment Graphic Equalizer (GEQ) and 10 segments of Parametric Equalizer (PEQ). Each output channel provides 10 segments of PEQ for fine-tuning.

2. Crossover Functions

Each output channel can be configured with independent High-Pass Filters (HPF) and Low-Pass Filters (LPF). Filter parameters can be adjusted to achieve asymmetrical crossover functions.

• Filter Slopes: Variable slopes can be set for Bessel and Butterworth filters (12dB, 18dB, 24dB per octave) and Linkwitz-Riley filters (12dB, 24dB, 36dB, 48dB per octave).

3. Delay and Phase Control

Each input and output channel includes independent delay and phase control, along with mute settings.

• Delay Range: Up to 1000ms.
• Step Distance: 21us for delays less than 10ms; 1ms for delays greater than 10ms.
• Delay Units: Configurable in milliseconds (ms), meters (m), or feet (ft).

4. Limiter and Other Effects

The DP-26 integrates a built-in limiter to protect your system from signal peaks. It also includes mixer functions, noise gates, and multi-effects processing.

Figure 5: Multi-Purpose Functions

This image visually represents the various functions integrated into the FULODE DP-26, including Equalizer, High-Medium and Low-Frequency Filters, Crossover, Mixer, Delayer, Limiter, Signal Distribution Router, Effects Processors, and Gain Audio Processor.

5. Front Panel Display and Controls

The front panel features a 2x24 LCD display for function setup and an 8-segment LED display for accurate digital level metering of inputs and outputs. Mute and edit status are also indicated.

Figure 6: Audio Signal Level Indicators

This image provides a close-up view of the five-segment illuminated tri-color level indicators on the FULODE DP-26, which display the volume level and mute status for each input and output channel.

6. User Programs and Presets

The DP-26 can store 12 user programs, allowing you to save and recall different configurations for various applications. This feature simplifies setup for recurring events or different sound environments.

Figure 7: 12 Saveable Preset Modes

This image illustrates the utility of the 12 saveable preset modes on the FULODE DP-26, showing different event types such as weddings, live concerts, parties, and presentations, for which custom audio settings can be quickly recalled.

Maintenance

Proper maintenance ensures the longevity and optimal performance of your FULODE DP-26.

• Cleaning: Regularly wipe the unit with a soft, dry cloth. Avoid using abrasive cleaners, solvents, or waxes, as these can damage the finish and internal components.
• Ventilation: Ensure the cooling fan exhaust port on the rear panel is clear of obstructions to prevent overheating. Do not block ventilation openings.
• Environment: Operate the DP-26 in a dry environment, away from direct sunlight, excessive heat, dust, and moisture. Do not expose the unit to rain or moisture.
• Connections: Periodically check all cable connections (power, audio, USB, RS232, RS485) to ensure they are secure and free from damage.

Troubleshooting

This section addresses common issues you might encounter with your FULODE DP-26.

If you encounter issues not listed here or if the suggested solutions do not resolve the problem, please refer to the support section for further assistance.

Technical Specifications

Below are the detailed technical specifications for the FULODE DP-26 Digital Audio Processor.

Figure 8: Product Panel Description with Dimensions

This image provides a detailed labeled diagram of the FULODE DP-26's front and rear panels, indicating the location of the USB port, LCD display, digital encoder, function menu, level indicators, input/output mute and edit keys, RS232 serial port, power socket, power switch, cooling fan exhaust port, RS485 port, and all input/output channels, along with overall dimensions.

Warranty and Support

FULODE is committed to providing high-quality products and customer satisfaction. Your DP-26 Digital Audio Processor is covered by a standard manufacturer's warranty against defects in materials and workmanship.

For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official FULODE website. Keep your purchase receipt as proof of purchase for warranty claims.

Customer Support

If you have any questions, require technical assistance, or need to report an issue with your DP-26, please contact FULODE customer support through the following channels:

• Online Support: Visit the official FULODE website for FAQs, troubleshooting guides, and contact forms.
• Email Support: Refer to your product documentation for the dedicated support email address.
• Brand Store: You can also visit the FULODE Brand Store on Amazon for additional information and contact options.

When contacting support, please have your product model (DP-26) and purchase details ready to expedite the process.