The DPA is a Class D digital power amplifier with an extremely low power consumption (0.2 W per channel) during standby mode and a high amplification efficiency of 90%. A four-step DIP switch can be configured to enable/disable the standby mode function (power-saving mode) when powered by AC; to require the front panel LEDs to comply with EN54-16; and to enable/disable battery monitoring.

The amplifiers are powered by a backup battery of 100 VAC ~ 240 VAC 50/60 Hz or 48 VDC. Each model has line inputs with individual volume gain, status LEDs (power, battery, fault, general fault, overload, and signal) on the front panel, and the DPA models can bridge two channels to double the power output.

There are four models in the DPA range:

   
• DPA-8060: 8 x 60W
   
• DPA-4125: 4 x 125W
   
• DPA-4250: 4 x 250W
   
• DPA-2500: 2 x 500W