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

The Pure Resonance Audio DA2240 is built for real commercial audio jobs where you need flexibility, predictable power, and clean rack design. It is a 2-channel Class D rack mount power amplifier that can drive 70V distributed speaker lines and low-impedance speakers, and it can do both in the same system because each channel has its own independent 70V or 4–16 ohm switch.

That channel-by-channel switching is the feature that makes the DA2240 especially useful. You can run a 70V ceiling speaker zone for paging and background music, while using the second channel to power a low-impedance zone where you want more traditional speaker wiring. This is a practical way to simplify racks and reduce amp count in offices, schools, restaurants, houses of worship, warehouses, retail, and public facilities.

Output is designed for distributed audio without overbuilding the system. You get 2 x 240W at 70V, 240W at 4 ohm, and 120W at 8 ohm. For most small-to-mid commercial zones, that is a strong sweet spot, plenty of headroom for intelligible paging and consistent music coverage, with efficient Class D performance to keep heat and power draw under control.

For integration and troubleshooting, the DA2240 includes balanced inputs (±385mV/20kΩ) to help keep signals clean, especially when equipment is spaced out in a rack or closet. You also get front-panel indicators for signal, peak clipping, protection, and power supply, so techs can validate status fast. And for systems that need visibility, power and fault indication remote monitoring is available through a Euroblock connection.

Reliability is covered with protection for high temperature, overload, and short-circuit conditions, plus fan-forced cooling to keep the amp stable in long-hour environments. In other words, it is designed to live in a rack and run all day.

Benefits
You can power mixed speaker systems from one 1U amplifier, which helps reduce equipment count and keeps racks cleaner. The independent 70V or 4–16 ohm switching per channel gives you real install flexibility. Balanced inputs, monitoring, and clear front indicators make setup and troubleshooting easier, while cooling and protection features support reliable, long-hour operation.

2-channel Class D rack mount power amplifier for commercial installs
Dual-impedance switching per channel, choose 70V or 4–16 ohm independently
2x240W at 70V for distributed speakers and multi-room zones
240W at 4 ohm and 120W at 8 ohm for low-impedance speaker loads
Run 70V on one channel and low-impedance on the other at the same time
Balanced input sensitivity ±385mV, 20kΩ for cleaner long cable runs
Remote power and fault monitoring via Euroblock connection
Front indicators for signal, peak clipping, protection, and power supply
Protection modes for high temperature, overload, and short-circuit
Fan-forced cooling for long-hour operation in AV racks
Standard 1U 19 inch chassis, space-saving and lightweight