DEMO 933 Headphone amp

The 933's amplifier is pure single ended Class A, employing active constant current sources. Each channel has just one continuously biased output device. The output waveform is therefore completely free from crossover distortion and has excellent small signal integrity.

DC coupling removes capacitors in the signal path, enhancing detail even further. The discrete topology is implemented with carefully selected audio grade components to deliver amazing resolution and drive capability for any high quality headphone.

The improved external power supply can be remotely sited to keep stray electromagnetic fields at bay. A generously rated, faraday screened transformer and soft recovery rectifier diodes are complemented by a custom wound input choke.

The choke input topology smooths out the current pulses demanded by the premium Mundorf reservoir capacitors, much like a flywheel, keeping the power supply's dynamic noise very low

Volume, mute and balance which are all accessed by the supplied remote control only.

The front of the amplifier has an arc of LEDs which conveniently display the chosen settings which are stored for the next time the 933 is powered up.

The amplifier is monitored for safe area operation at all times and is automatically muted for power on and off.