Dan D’Agostino Momentum HD Preamplifier


The Dan D’Agostino Momentum HD Preamplifier is a triumph of engineering and refinement, elevating the already acclaimed Momentum Preamplifier to new heights. This “HD” iteration signifies a significant leap in high dynamic and high-definition performance. Meticulous upgrades in the input stage, power supply, audio circuitry, and control sections deliver a listening experience that surpasses previous benchmarks.

Key Features:

  1. Balanced Circuits for Optimal Performance: Much like the Momentum amplifiers, the Momentum HD Preamplifier employs a complementary balanced circuit topology, ensuring maximum bandwidth and minimal noise. It boasts fully discrete audio circuitry without using op-amps or integrated circuits. The design features zero feedback for the most authentic and musical sound quality. Volume control is achieved through a resistor network controlled by an optical controller, ensuring a transparent and pristine volume adjustment.
  2. Detail and Richness: The preamplifier introduces a redesigned discrete differential FET input stage with exceptional results. This stage features ultra-high input impedance, isolating the audio signal path from external factors. This enhancement renders fine-grain detail and delicate musical nuances with a previously unattainable richness.
  3. Striking Dynamics: The Momentum HD Preamplifier incorporates a main power transformer that is 33% larger than its predecessor, employing a unique winding technology to deliver greater power output from the same footprint. The output stages operate at a 36% higher voltage, significantly enhancing micro and macro dynamics, resulting in a striking contrast and speed in musical delivery.
  4. Advanced Remote Control: The included remote control utilizes Bluetooth technology, extending its range by a factor of five and eliminating line-of-sight limitations commonly found in IR remote controls. The tone and volume control circuits have also been newly designed to increase range and precision in both functions.
  5. Aesthetic Excellence: The design language of the Momentum HD Preamplifier harmonizes seamlessly with the Momentum M400 and S250 amplifiers, featuring copper accents that complement the amplifiers’ distinctive copper heat sinks. The front panel meter indicates the volume setting, polarity, and mute status, while selector buttons indicate the active input.
  6. Upgrade Path: Existing Momentum Preamplifier owners can upgrade to the new Momentum HD Preamplifier electronics enhancements.


  • Frequency Response: 0.1 Hz to 1 MHz, -1 dB / 20Hz to 20 kHz, ±0 dB
  • Signal-to-Noise Ratio: -105 dB, unweighted
  • Gain: +13 dB or +19 dB (switchable)
  • Input Impedance: 1 MΩ
  • Output Impedance: 10Ω
  • Power Consumption: <1 watt
  • Distortion (Full output): <0.006%, 20 Hz to 20 kHz
  • Inputs: 6 balanced XLR stereo
  • Outputs: 2 balanced XLR stereo
  • Dimensions (Preamp): 4.3 x 18 x 12 inches / 10.8 x 45 x 30 cm
  • Dimensions (Power Supply/Base): 3 x 11 x 8 inches / 7.5 x 27.5 x 20 cm

The Dan D’Agostino Momentum HD Preamplifier embodies meticulous engineering, presenting music with depth and fidelity that redefines high-end audio. It stands as a testament to the pursuit of sonic excellence.


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