SpacEND ZERO Electrostatic Headphone Amplifier
User Manual
SpacEND ZERO Electrostatic Headphone Amplifier adopts fully balanced tube
circuit. The input applies the Swiss original LUNDAHL input transformer as the
first stage buffer and full-balanced inversion. The volume control uses the
Danish DACT quad chip high-precision attenuator. The line voltage
amplification includes four ECC81 and ECC802s, the driving stage uses two
ECC802s, and the output four EL34. All eight capacitors are coupled by
German Mundorf copper foil high-grade capacitor, signal path and main
power supply part are connected with single crystal silver and single crystal
copper cables
The main power supply design of SpacEND ZERO Electrostatic Headphone
Amplifier, is a dual-mono 150 watt power transformer structure, voltage
amplification and output power supply are completely independent. A 6X4
electronic tube is introduced as high voltage buffer in the voltage amplification
power supply channel with all unit AC filament. In order to improve signal-to-
noise ratio, the CLC filter circuit with three choke coils is introduced, plus full
line voltage regulator circuit. The rectification circuit adopts fourteen original
American MR760 diodes thirteen Japanese original Nichicon KX high voltage
capacitors to ensure pure, high speed, abundant energy for amplifier power
supply
