DPA-1 Stereo Hybrid Digital Power Amplifier

The DPA-1 Digital Power Amplifier was created to perform not just in today’s stereo systems, but in tomorrow’s systems, too. The core of the DPA-1 is a wizardly circuit topology that combines the musicality of traditional Class A and Class AB amps with the power, dynamics and efficiency of the latest Class D designs. From a chassis just 10.5 inches wide, the DPA-1 delivers 125 watts per channel into 8 ohms and 200 watts per channel into 4 ohms, plenty enough power even for the largest tower speakers. It might seem like magic, but it’s just solid engineering.

 

Pure Class A input stage

The input stage mirrors those found in many of the world’s best and most expensive amplifiers: Class A topology composed of discrete FETs and powered by a semi-toroidal transformer. This pure analog stage preserves every last detail and every ounce of musicality, and properly amplifies and buffers the incoming signal so it’s ready to move on to the output stage.

 

Powerful, efficient, cool

The cool-running efficiency of the Class D output stage allows the DPA-1 to deliver maximum performance even in areas with minimal ventilation, such as equipment cabinets and closets. The DPA-1 runs at about 80% efficiency, compared to about 30% for a typical Class AB amp. Power consumption at idle is about 20 watts, compared to 100 watts or more for a Class AB amp with comparable power and sound quality.

 

Key features

  • 125 WPC into 8Ω, 200 WPC into 4Ω
  • Class A discrete FET input stage
  • Cool-running Class D output stage
  • XLR and RCA inputs
  • Switchable gain and mute
  • Upgradeable to dual-mono power supply

Specifications

Power output per channel (0.1% THD+N, 1 kHz): 125 watts into 8Ω; 200 watts into 4Ω
Frequency response: +/-0.25 dB, 20 Hz to 20 kHz
Nominal THD+N (1 watt into 8Ω): 0.05%
Signal-to-noise ratio (1 kHz): 100 dB unweighted
Input impedance: XLR: 17.0 kΩ in low gain mode, 17.6 kΩ high gain; RCA: 10.7 kΩ in low gain mode, 11.6 kΩ high gain
Output impedance: 0.022 Ω
Channel separation (1 kHz): -80 dB
Gain: 20 or 26 dB switchable
Inputs: Stereo XLR, stereo RCA, IEC power, 3.5mm trigger
Outputs: 5-way binding posts
Available finishes: Silver
Height: 3.0 in / 76 mm
Width: 10.5 / 267 mm
Depth: 11.6 in / 295 mm
Net weight: 16.0 lb / 7.3 kg

 Owner’s Manual