Pure Resonance Audio DA2240 2-Channel 240W 70V Power Amplifier

Flexible 2-Channel Power for 70V and Low-Impedance Systems

The Pure Resonance Audio DA2240 is a 2-channel Class D power amplifier designed for distributed audio, paging, PA, and installed sound systems. Each channel provides up to 240W and can independently operate in either 70V or 4–16 ohm mode, giving you flexibility to power different speaker types from the same amplifier.

The DA2240 combines dual-impedance operation, balanced Euroblock connections, remote fault monitoring, fan-assisted cooling, and built-in protection in a compact 1U rack chassis.

Key Specifications

• Model: DA2240
• Amplifier type: 2-channel Class D power amplifier
• Rated output at 70V: 2 × 240W
• Rated output at 4 ohms: 240W per channel
• Rated output at 8 ohms: 120W 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 consumption: 600W

Who Should Choose the DA2240?

Choose the DA2240 when you need separate amplification for two speaker zones and want the freedom to use 70V distributed speakers, conventional low-impedance speakers, or one of each.

Its independent channel configuration makes it useful for offices, schools, restaurants, warehouses, retail spaces, houses of worship, fitness facilities, and other multi-zone audio systems.

240 Watts Per Channel

The DA2240 provides up to 240W per channel at 70V or 4 ohms and 120W per channel at 8 ohms.

This makes it suitable for medium-size paging, background music, and installed sound systems that require more flexibility than a single-channel amplifier.

Independent 70V and 4–16 Ohm Channels

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

One channel can power a 70V distributed speaker line while the other drives compatible low-impedance speakers, allowing mixed system designs without requiring two separate amplifiers.

Balanced Euroblock Inputs and Outputs

The DA2240 uses detachable Euroblock terminals for balanced audio inputs and speaker 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 provides Euroblock connectivity for remote power control and fault indication monitoring.

This can be useful in equipment racks and installed systems where amplifier status needs to be monitored remotely.

Front-Panel Channel Controls

Independent front-panel level controls allow each amplifier channel to be adjusted separately.

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

Fan 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 DA2240 uses Class D amplification with a high-efficiency switching power supply. Pure Resonance Audio specifies approximately 85% efficiency, helping reduce power loss and heat output.

Compact 1U Rack Chassis

• Height: 1.73" (44 mm)
• Width: 19" (484 mm)
• Depth: 12.4" (315 mm)
• Weight: 10.36 lb (4.7 kg)

What's Included?

• 1 Pure Resonance Audio DA2240 power amplifier
• Power cord

Complete Your Audio System

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

Need Help Matching the DA2240?

Send Bear Security Shop your speaker models, quantity, impedance or transformer tap settings, and planned channel configuration. We can help confirm amplifier loading and system compatibility.

How much power does the Pure Resonance Audio DA2240 provide?

The DA2240 provides up to 240W per channel at 70V or 4 ohms and 120W per channel at 8 ohms.

Does the DA2240 support 70V speaker systems?

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

Can the DA2240 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. Each channel has an independent output-mode switch, so one channel can operate at 70V while the other powers compatible 4–16 ohm speakers.

How much power does the DA2240 provide at 8 ohms?

Pure Resonance Audio specifies 120W per channel at 8 ohms.

What type of inputs does the DA2240 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 DA2240 is rated at 95dB or greater.

What protection features are included?

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

Does the DA2240 use cooling fans?

Yes. It uses fan-forced cooling to manage heat during extended operation.

Does it support remote monitoring?

Yes. The DA2240 supports remote power control and fault indication monitoring through a Euroblock connection.

How many rack spaces does the DA2240 use?

The DA2240 occupies one standard 19-inch rack unit.

Does the DA2240 include Bluetooth or a built-in mixer?

No. The DA2240 is a dedicated power amplifier and should be paired with a compatible mixer, processor, or audio source.