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3ES Electrostatic Headphone Amplifier/Preamplifier

3ES Electrostatic Headphone and Pre Amplifier
3ES Electrostatic Headphone and Pre Amplifier

3ES Electrostatic Headphone Amplifier/Preamplifier

from 8,999.00
  • Ships in 4 to 6 weeks

  • Add 3% for international orders



With over 10 years of experience in electrostatic amplifier designs. The all-new 3ES is our flagship electrostatic headphone amplifier and preamplifier. It shares the same architecture as our flagship WA33 dynamic headphone amplifier in a two-unit design where the top unit is an amplifier docking on the power supply using our internal coupling architecture (ICA) technology. The 3ES employs two 6SN7 driver tubes pushing four 300B power tubes as the output stage and one rectifier tube in the center of the amp. The new 3ES achieves the most ambitious dream in the audio world.

 *shown with upgrade tubes

*shown with upgrade tubes


  • Compatible with 5-pin 580v (Pro-bias) for STAX, HiFiMan, MrSpeakers headphones
  • Dual headphone output [simultaneous operation]
  • XLR input x 2, RCA input x 1
  • User selectable output: pre-amp or headphone
  • Anodized aluminum chassis, available in black or silver
  • Self-biasing with compatible tubes [chart]
  • Dimensions [without tubes]: 17 3/4" (W), 7 1/4" (H), 13 1/2" (D) / 450.85mm (W), 184.15mm (H), 342.90mm (D), weight: 52 lbs. / 24 kg. 
  • Voltage: AC 100 - 120V 60HZ or AC220 - 240V, 50HZ, voltage built to destination country
  • Designed and assembled in New York, USA

Elite Edition

  • Mundorf Supreme Silver/Gold audio capacitors
  • Single Crystal copper hook-up and signal wires are used throughout.
  • Alps RK50 4-channel volume control in brass enclosure
  • Cardas Audio XLR and WBT RCA connectors
  • 3ES Elite Edition 24k gold-plated plaque



  • Quick start guide
  • 3ES Standard or 3ES Elite Edition electrostatic headphone amplifier x 1
  • 300B vacuum tube x 4
  • 6SN7 vacuum tube x 2
  • 5U4G vacuum tube x 1

*AC power cord and audio cables are not included

In the box

 shown with STAX SR-009S and SR-009 headphones (not included)

shown with STAX SR-009S and SR-009 headphones (not included)


Power Tube Upgrade 1

TA-300B Takatsuki Tube (In Quad)

Power Tube Upgrade 2


Driver Tube Upgrade

Rectifier Tube Upgrade 1

TA-274B Takatsuki Tube (In Each)

Rectifier Tube Upgrade 2



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