Sugden - Masterclass HA-4 Headphone Pre-amplifier

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.

Facilities:
Inputs: One line level input, one balanced input
Outputs: Stereo ¼” jack socket, one line level output
Volume Control: Manual operation

​​Specifications:
– 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)