ALCHEMY DPA-1

Power Amplifier
The DPA-1M Digital Power Amplifier doubles up on the DPA-1’s almost magical combination of power, musicality and efficiency. The DPA-1M conjures up an incredible 325 watts per channel into 8 ohms. Because it’s a monoblock, power is doubled and the left and right channels can hit full output and maximum dynamics without impacting the performance of the other channel. It’s mgical performance is a masterful combination of a Class A analog input stage with a high-efficiency Class D output stage.
Analog Class A input stage
The input stage is the same essential circuit used in many of the world’s best and most expensive amplifiers: a Class A design built using discrete FETs and powered by a semi-toroidal transformer. Because it’s pure analog all the way through, with no integrated circuits in the signal path, it provides the output stage with an ultra-clean signal and preserves every last tiny detail in the music.
Effortless, efficient power
How does the DPA-1M deliver so much power from such a tiny chassis? The secret behind this magic is a Class D output stage, which runs about 80% efficiency, compared to about 30% for a typical Class AB amp, and idles at about 20 watts rather than the 100 watts many Class AB designs consume. Because the DPA-1M’s output stage produces so little heat, it requires minimal ventilation. Thus, it operates flawlessly whether it’s out on the floor on an amp stand, or tucked away in an equipment cabinet or closet.


  • Product Information
    • Features

      • 325 WPC into 8Ω, 400 WPC into 4Ω
      • Class A discrete FET input stage
      • Cool-running Class D output stage
      • XLR and RCA inputs
      • Switchable gain and mute

    • Specifications

      Power output (0.1% THD+N, 1 kHz)  325 watts into 8Ω; 400 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 17.0 kΩ in low gain mode, 17.6 kΩ high gain;
      Input impedance  XLR
      Output impedance 0.022 Ω
      Channel separation (1 kHz)  -80 dB
      Gain  20 or 26 dB switchable
      Inputs  XLR, RCA, IEC power, 3.5mm trigger
      Outputs 5-way binding posts (two sets)
      Dimensions (w x h x d)
      Width 267 mm
      Height 76 mm
      Depth 295 mm
      Net weight 7.3 kg

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