DA-2125 Stereo Amplifier

Digital Stereo 2 x 125W Audio Amplifier

At the heart of every great audio system is a power amplifier.   It’s what brings the system to life.  Vanguard Dynamics amplifiers are carefully designed and engineered to provide incredible acoustics while performing reliably.  The Vanguard team has decades of experience in amplifier design and has put all of their experience into this outstanding line of amplifiers.   Each part of the amplifier has been carefully considered and built for the best possible performance.  That’s why in many models where others would use digital power supplies we have chosen toroidal copper power supplies.  That’s also why while others manufacture in large scale facilities we instead choose a smaller manufacturing partner that only does amplifiers and has a decades long history of manufacturing some of the best amplifiers ever made.  We back all of this confidence in our performance and reliability with a unique 5-year warranty.


  • 2 x 125 W Per Channel Full Digital Amp
  • Dual Mono Amplifier Design
  • 2U Rack Height
  • Bridgeable Adjoining Channels
  • Auto On/Off w/ 3-24V AC/DC Trigger Input for Remote Power On
  • 12V Trigger Output to Power On Other Devices with Voltage Trigger
  • DigiPro™ Class D Amplifier Design for Maximum Sound Quality and Cooling
  • 5 Way Binding Posts
  • Analog RCA Input
  • Independant Level Controls for Each Channel
  • Includes Rack Ears


  • Rated Power Output:  125 Watts Per Channel at 8Ω / 200 Watts Per Channel at 4Ω
  • Bridged Power Output:  400 Watts at 8Ω
  • Input Impedance:  >22K Ω
  • S/N Ratio: (A-WTD) 100dB
  • Frequency Response:  10Hz to 70KHz
  • Input Sensitivity:  1.1V for 8 ohm Rated Output
  • Damping Factor:  >150
  • Separation:  70dB at 1KHz
  • Total Harmonic Distortion:
    • <0.2% 20Hz to 20kHz
    • <0.04% at 1kHz
  • Fuse Rating:  120V Version: T8A/250V
  • Dimensions 6″ H x 17 ½” W x 16 1/8″ D
  • Unit Weight: 28 lbs

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