Pure Resonance Audio DA2500 2-Channel 500W 70V Power Amplifier

High-Power Dual-Impedance Amplification in a 1U Rack

The Pure Resonance Audio DA2500 is a 2-channel Class D power amplifier designed for distributed audio, paging, PA, and installed sound systems. Each channel provides up to 500W and can independently operate in either 70V or 4–16 ohm mode, allowing one amplifier to support different speaker types at the same time.

The DA2500 combines high output, flexible impedance selection, balanced Euroblock connections, fan-assisted cooling, and built-in protection in a compact 1U 19" rack chassis.

Key Specifications

• Model: DA2500
• Amplifier type: 2-channel Class D power amplifier
• Rated output at 70V: 2 × 500W
• Rated output at 4 ohms: 500W per channel
• Rated output at 8 ohms: 250W per channel
• Speaker outputs: 70V / 4–16 ohms
• Input sensitivity: ±385mV / 20kΩ balanced
• Frequency response: 80Hz–16kHz (+1dB / -3dB)
• Signal-to-noise ratio: ≥95dB
• THD: ≤0.1% at 1kHz, 1/3 rated power
• Cooling: Fan-forced cooling
• Protection: High temperature, overload, and short circuit
• Rack height: 1U
• Power supply: 110–120V AC, 60Hz
• Power consumption: 1200W

Who Should Choose the DA2500?

Choose the DA2500 when you need substantial power for a 70V distributed-audio system, low-impedance speakers, or a combination of both.

Because each channel can be configured independently, one channel can power a 70V speaker line while the other drives compatible 4–16 ohm speakers.

500 Watts Per Channel

The DA2500 provides up to 500W per channel at 70V or 4 ohms, with 250W per channel available at 8 ohms.

This makes it suitable for higher-output paging, music, fitness, venue, warehouse, and other multi-speaker systems that require more power than a typical mixer amplifier can provide.

Independent Dual-Impedance Channels

Each amplifier channel has its own 70V / 4–16 ohm output selector.

The two channels can use different output modes simultaneously, giving you the flexibility to run a distributed 70V speaker system on one channel and conventional low-impedance speakers on the other.

Balanced Euroblock Connections

The DA2500 uses detachable Euroblock terminals for balanced audio inputs and outputs, making it easy to integrate with compatible mixers, processors, and installed audio equipment.

Use appropriately rated speaker wire based on the amplifier output mode, speaker load, and cable length.

Remote Power and Fault Monitoring

The amplifier includes a Euroblock connection for remote power control and fault indication monitoring.

This can be useful in installed systems where centralized equipment control or status monitoring is required.

Front-Panel Level and Status Controls

Independent front-panel controls allow adjustment of each channel's level.

Status indicators provide visual feedback for signal, peak clipping, protection, and power conditions.

Fan-Forced Cooling and Protection

Automatic cooling fans help dissipate heat during extended operation.

Built-in high-temperature, overload, and short-circuit protection help protect the amplifier during abnormal operating conditions.

Efficient Class D Design

The DA2500 uses Class D amplification with a high-efficiency switching power supply. Pure Resonance Audio specifies approximately 85% operating efficiency, helping reduce wasted energy and heat compared with less efficient amplifier designs.

Compact 1U Rack Chassis

• Height: 1.73" (44 mm)
• Width: 19.05" (484 mm)
• Depth: 12.4" (315 mm)
• Weight: 10.8 lb (4.9 kg)

What's Included?

• 1 Pure Resonance Audio DA2500 power amplifier
• Power cord

Complete Your Audio System

• Pure Resonance Audio
• Audio Mixers & Signal Processors
• Speaker Wire

Need Help Matching the DA2500?

Send Bear Security Shop your speaker models, quantity, impedance or transformer tap settings, and planned channel configuration. We can help confirm amplifier loading and whether the DA2500 is appropriate for your system.

How much power does the Pure Resonance Audio DA2500 provide?

The DA2500 provides up to 500W per channel at 70V or 4 ohms and 250W per channel at 8 ohms.

Does the DA2500 support 70V speaker systems?

Yes. Each channel can independently operate in 70V mode.

Can the DA2500 power low-impedance speakers?

Yes. Each channel can be switched to 4–16 ohm operation for compatible low-impedance speakers.

Can one channel run 70V while the other runs 8-ohm speakers?

Yes. The two channels have independent output-mode switches, so one channel can operate at 70V while the other powers compatible 4–16 ohm speakers.

How much power does it provide at 8 ohms?

Pure Resonance Audio specifies 250W per channel at 8 ohms.

What type of inputs does the DA2500 use?

The amplifier uses balanced detachable Euroblock connections.

What is the frequency response?

Pure Resonance Audio specifies 80Hz–16kHz with a tolerance of +1dB / -3dB.

What is the signal-to-noise ratio?

The DA2500 is rated at 95dB or greater.

What protection features are included?

The amplifier includes high-temperature, overload, and short-circuit protection.

Does the DA2500 have cooling fans?

Yes. It uses fan-forced cooling to manage operating temperature during extended use.

Does it support remote monitoring?

Yes. A Euroblock connection supports remote power control and fault indication monitoring.

How many rack spaces does the DA2500 use?

The DA2500 occupies one standard 19-inch rack unit.

Does the DA2500 include a mixer or Bluetooth?

No. The DA2500 is a dedicated power amplifier and should be paired with a compatible mixer, processor, or audio source.