Sugden Masterclass HA-4 Headphone Pre-amplifier

Sugden Masterclass HA-4 Headphone Pre-amplifier


Regular price $1,850.00 Sale

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State of the art Class A headphone amplifier and compact high end pre-amplifier.

The HA-4 is not only a state of the art class A headphone amplifier, it can also be used as a compact high-end pre-amplifier. The design is similar to our top of the range Sapphire DAP-800 and will drive any dynamic headphone. Featuring Sugden VCV circuit and coupled to a pure class A zero feedback mosfet output stage. The HA-4 is unconditionally load stable with a discrete constant voltage series power supply. A high input impedance ensures absolute minimal loss of signal with perfect current gain.


  • Inputs: One line level input, one balanced input

  • Outputs: Stereo ¼” jack socket, one line level output

  • Volume Control: Manual operation


  • Input Impedance: 20k Ohms

  • Gain: 16dB

  • Channel Separation: >90dB

  • Frequency Response: >0.3dB 20Hz-30kHz

  • Signal to Noise: >95dB

  • Output Impedance: 1 Ohm

  • Gross Weight (packed): 6kgs
Dimensions: 80 x 250 x 310mm (hwd)

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