Work Pro Pulse Drive 2004 – 4-Channel Class D Amplifier with Full DSP

The Work Pro Pulse Drive 2004 is a professional-grade four-channel Class D amplifier engineered for reliability, flexibility, and clean power delivery. Each channel is capable of delivering 500 W into 4 ohms, while bridge-mono operation provides 2 × 1000 W for applications demanding greater headroom and power density. Compact in size but extensive in capability, this amplifier combines efficiency with powerful DSP processing, making it suitable for live sound, installations, and multi-zone audio systems.

Work Pro has built its reputation on designing products that balance performance with usability. The Pulse Drive 2004 is part of this philosophy, offering a robust amplifier platform that incorporates essential DSP features directly into the unit. Users benefit from both front-panel control and remote management, giving them the flexibility to adapt to different system configurations with ease.

Design and Build Quality

At just 1U in rack height, the Pulse Drive 2004 is designed for space-conscious professionals who need maximum output without compromising rack real estate. Despite its compact form factor, the amplifier incorporates four analog balanced XLR inputs and four amplified outputs via XLN4 connectors, ensuring compatibility with a wide range of professional audio systems.

The front panel provides an OLED screen and encoder for direct configuration, allowing quick access to essential parameters even without a computer connection. When network control is needed, the amplifier communicates over Ethernet, enabling remote monitoring and adjustment through a PC interface. This makes it practical for both fixed installations and live environments where adjustments need to be made quickly and efficiently.

The construction emphasizes durability, with reinforced housing and internal protection systems that safeguard against thermal overload, short circuits, and power surges. These protections ensure consistent reliability even under demanding performance conditions.

DSP Features and Control

The Pulse Drive 2004 integrates a full suite of DSP tools that enable precise system optimization. Each channel features an 8-band parametric equalizer, adjustable high-pass and low-pass filters, compression, noise gating, delay, gain, and phase control. This level of processing ensures the amplifier can adapt to different loudspeaker types, room acoustics, and system requirements without the need for additional external processors.

Routing is flexible, with the ability to assign inputs to any output channel. This is particularly useful in multi-zone or distributed audio systems, where different areas require customized processing and output levels. The intuitive control interface, whether accessed via the front panel or remotely, makes managing these features straightforward.

Performance and Applications

The Pulse Drive 2004 has a frequency response from 20 Hz to 20 kHz with a low total harmonic distortion of less than 0.15%. This ensures clean reproduction across the audible spectrum, maintaining the integrity of both music and speech applications.

Its performance characteristics make it well suited for a range of professional scenarios:

• Live Sound Reinforcement – Delivering powerful output for full-range loudspeakers or subwoofers in portable or touring systems.

• Installed Sound Systems – Ideal for theaters, houses of worship, conference halls, and hospitality venues requiring multiple channels of reliable amplification.

• Multi-Zone Audio – DSP routing allows independent control of different spaces in one venue, improving system management.

• Subwoofer Integration – In bridge-mono mode, the amplifier delivers 1000 W per channel pair, providing the headroom required for low-frequency applications.

The combination of high output power, detailed DSP, and protection features ensures the Pulse Drive 2004 can adapt to both demanding live environments and long-term fixed installations.

Specifications

Amplifier Type: Class D
Channels: 4
Output Power: 4 × 500 W @ 4 Ω, 2 × 1000 W bridged mono
DSP Features: 8-band parametric EQ, high-pass & low-pass filters, compression, noise gate, delay, gain, phase control
Inputs: 4 × balanced XLR
Outputs: 4 × XLN4
Frequency Response: 20 Hz – 20 kHz
Total Harmonic Distortion (THD): < 0.15%
Control: OLED display with encoder, Ethernet remote control
Protection: Thermal, short circuit, power-on/off muting
Rackmount: 1U
Dimensions: 483 × 44 × 280 mm
Weight: approx. 6 kg
Power Consumption: approx. 1300 W

Conclusion

The Work Pro Pulse Drive 2004 is a versatile and dependable amplifier solution for professional audio systems. Its four channels of Class D power, combined with advanced DSP control, make it suitable for a wide variety of applications ranging from touring and live sound to fixed installations and multi-zone audio setups. With strong output capability, robust protective measures, and a compact rack design, it delivers both performance and reliability.

For professionals seeking a balance of power, precision, and control in a single amplifier, the Work Pro Pulse Drive 2004 stands as a strong choice in the Pulse Drive series.

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About Work Pro

Work Pro products are engineered and manufactured in Spain, combining advanced technology with rigorous quality control to deliver reliable professional audio solutions. Their modern production facilities integrate automated processes and comprehensive testing, ensuring consistent performance and durability across all products. Over the years, Work Pro has established itself as a trusted name in the professional audio market, offering high-quality amplifiers, speakers, and sound reinforcement equipment that provide excellent performance and value for both touring and installation applications.