********** Restock in June 2026 **********

HongShu Audio EH-1 & EHA-1 Electrostatic Headphone System 

Features:
-4-inch large circular electrostatic driver with fully open-back structure for exceptional depth and soundstage
-Ultra-lightweight 295g design with optimized clamping force for extended listening comfort
-EHA-1 dedicated amplifier features Bass Boost switch and physical balance adjustment knob
-Standard 580V polarization voltage ensures compatibility with most electrostatic headphones
-Includes EH-1 headphones, EHA-1 amplifier, 1.8m detachable EC-1 cable, and 12V power supply

Expansive, Fatigue-Free Soundstage
The EH-1 V4 features a core 4-inch large-diameter circular electrostatic driver, which, combined with a fully open-back design, creates a soundstage with exceptional depth and breadth. The delicate resolution and smooth frequency response characteristic of electrostatic drivers allow you to hear the subtle nuances in the music without any harshness or fatigue.

Incredible Lightness for Marathon Listening
The EH-1 weighs an astonishingly light 295 grams (excluding cable). Combined with an optimized clamping force design, it remains comfortable even during extended listening sessions or marathon audiophile test drives, making you almost forget it's there.

More Than Reproduction—Fine-Tuning at Your Fingertips
The included EHA-1 dedicated amplifier provides extensive adjustment options: Bass Boost Switch (when listening to large-scale orchestral music or watching movies, activate the bass boost to transform the sound into a powerful, punchy experience), Balance Adjustment (left-right balance can be physically fine-tuned via the rear knob), and Compatibility (utilizing a standard 580V polarization voltage, the EHA-1 is also compatible with most other electrostatic headphones).

Technical specifications
EH-1 Electrostatic Headphones
Driver Unit: 4-inch Electrostatic Driver
Sensitivity: 102dB @ 100Vrms
Cable Length: 1.8m (detachable)
Capacitance: 100 pF (±1.8m)
Frequency Response: 6-42,000 Hz
Weight: 295g (without cable)

EHA-1 Electrostatic Amplifier
Power Input Rated Voltage: 12V (DC)
Rated Power: 5W
Standard Input Level: 2 Vrms
Maximum Output Level: 300 Vrms @1% THD
Total Harmonic Distortion: THD < 0.001% @ 100 Vrms
Input Impedance: 10 kΩ
Frequency Response: 10-25,000 Hz (-1 dB)
Polarization Voltage: 580 V
Weight: 375 g
Dimensions (L × W × H): 110 × 120 × 38 mm (excluding protrusions)

In The Box:
EH-1 Electrostatic Headphones (with SP-1V ear pads)
EHA-1 Electrostatic Headphone Amplifier
1.8m EC-1 Headphone Cable (detachable)
2mm Hex Wrench (stored in accessory box)
12V Power Supply