HP-1: Ultra-High End Headphone Amp


On sale while supplies last.

Ultra-high end 3 W headphone amplifier with vanishingly low distortion.

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The Neurochrome HP-1 is an ultra-high end headphone amplifier capable of producing up to 3 W into a 20 Ω load at vanishingly low distortion. The HP-1 will drive even the most challenging headphones with the utmost fidelity and natural sonic profile. It is designed to be as close to a straight wire with gain as technically possible. In addition to providing the ultimate technical performance, the HP-1 also provides peace of mind as it contains advanced protection circuitry which will protect your headphones in case of various fault conditions.

Key Features

  • Fully optimized 4-layer circuit board.
  • Total harmonic distortion: 0.000017 % (200 mW, 600 Ω).
  • Total harmonic distortion: 0.000032 % (200 mW, 300 Ω).
  • Total harmonic distortion: 0.000050 % (200 mW, 32 Ω).
  • Total integrated output noise: 1.0 µV RMS (A-weighted, 20 Hz – 20 kHz).
  • Output power: 3.0 W (32 Ω).
  • Output power: 450 mW (300 Ω).
  • Output power: 230 mW (600 Ω).
  • Gain selectable (+6, +12, +20 dB) by front panel switch to accommodate a wide range of sources, including smartphones, tablets, DACs, and CD players.
  • 1/4″ phone and 4-pin XLR output connectors.
  • Balanced (XLR) and unbalanced (RCA) inputs.
  • ±0.1 % tolerance Susumu RG-series resistors used in critical parts of the circuit to ensure the best possible performance.
  • All signal switching is accomplished using relays with gold plated switch contacts.
  • ALPS RK097 volume control potentiometer.
  • Well filtered switching power supplies followed by onboard low noise linear post-regulators ensuring the highest power supply performance.
  • Protection against DC voltage on the amplifier output.
  • Integrated mains soft start and 320 Joule surge suppressor.
  • ON indicator emitting a subtle and pleasant blue glow.
  • International mains voltage compliant (85 – 264 VAC @ 47 – 440 Hz).
  • All aluminum chassis made in Canada.

The HP-1 is available in various options ranging from a bare circuit board (no components included) for DIY assembly to a fully and assembled and tested product.

Please follow this link for the full circuit description, specifications, and performance measurements: HP-1 Product Description Page.