HONGSHU AUDIO
Electrostatic headphones,
no longer out of reach
HONGSHU Audio believes a wide soundstage and fine resolution should not belong to just a few.
With a complete electrostatic system, the EH-1 brings a listening experience that once cost a small fortune to an ordinary desk.
BRAND STORY
Six years of refinement, for one thing
HONGSHU Audio (虹曙音響) was founded in Shanghai in 2019 and spent years developing electrostatic headphones. In 2025 it launched its first product, the EH-1 electrostatic headphone, whose unbelievable price and captivating sound drew an immediate response from the market. (The brand once used the name Halo Acoustics and has since unified under HONGSHU Audio.)
The team never compromises on details. The driver and tuning in particular went through many revisions and refinements to make sure production units truly sound beyond their class. In 2026, the EH-1 officially launched in Taiwan.
4 in
Large circular electrostatic diaphragm
295 g
Weight (without cable)
300 Vrms
EHA-1 full-range drive
12 months
Warranty on orders outside Taiwan
TRANSDUCER
A large diaphragm, a soundstage that opens up
At its core is a 4-inch full-range electrostatic diaphragm in a fully open design. The large diaphragm opens up both depth and width of the soundstage, with extremely low distortion and a smooth frequency response.
Add the fine resolution electrostatic drivers are known for, and you can hear the delicate layer of air in the music without it ever turning harsh or tiring.
COMFORT
295 g, comfortable all night
It weighs just 295 g without the cable, which is light for an electrostatic headphone. The clamping force has also been retuned, so long orchestral works or an all-night listening marathon stay comfortable.
With a leather headband and perforated leather ear pads, after a while you almost forget you are wearing it.
EHA-1 AMPLIFIER
Not just faithful, but adjustable
The EH-1 comes with the dedicated EHA-1 amplifier, so it is a complete electrostatic system right out of the box, with nothing else to buy.
300 Vrms full-range drive With the standard 580 V Pro Bias, it can drive most electrostatic headphones on the market.
STAX standard connector Uses the STAX connector and voltage standard, compatible with mainstream electrostatic gear, so other electrostatic headphones you own will plug right in.
Even runs from a power bank Far smaller and more efficient than comparable electrostatic amplifiers. A 12 V power supply is included and a regular power bank can drive it too, so it fits on a desk, in an office or in a dorm.
Left-right balance knob On a particularly humid day, if you notice a slight channel difference, the knob on the back lets you correct it on the spot.
Bass Boost switch Turn it on for large-scale works or movies for a little more weight in the low end.
MEASURED
Not adjectives, but measurements
The frequency response of the EH-1 is measured by the maker on a B&K 5128 head and torso simulator. This is today's high-end standard for headphone measurement: a realistic ear canal and head acoustic model replaces the traditional flat-plate coupler, so the curve is closer to what your ears actually hear when wearing the headphone.
Few brands in this price range are willing to publish measured curves.
The green line is normal mode and the red dashed line is with Bass Boost on, measured with the original oval-cavity ear pads.
EH-1 electrostatic headphone
| Type | Over-ear |
| Driver | 4-inch electrostatic driver |
| Sensitivity | 102 dB @ 100 Vrms |
| Frequency response | 6–42,000 Hz |
| Capacitance | 100 pF (including 1.8 m cable) |
| Cable | 1.8 m standard cable, detachable |
| Weight | 295 g (without cable) |
EHA-1 electrostatic headphone amplifier
| Power supply | DC 12 V |
| Rated power | 5 W |
| Standard input level | 2 Vrms |
| Maximum output level | 300 Vrms @ 1% THD |
| Harmonic distortion | THD < 0.001% @ 100 Vrms |
| Input impedance | 10 kΩ |
| Frequency response | 10–25,000 Hz (−1 dB) |
| Bias | 580 V |
| Weight | 375 g |
| Dimensions | 110 × 120 × 38 mm (L × W × H) |
From the desk to your ears
A computer, a source, plus the EH-1 and EHA-1, and you can hear electrostatic detail in your own room.
SHIPPED FROM TAIWAN
Official distributor, worldwide delivery
HONGSHU Audio is distributed in Taiwan by Soundessence Ltd. (成音貿易有限公司), and we ship the EH-1 system worldwide from Taiwan.
US$700 delivered
Shipping and import duties are included, with nothing more to pay on delivery.
12-month warranty
You ship the unit to us in Taiwan and we pay the return shipping.
Pay with PayPal
PayPal balance or any card, right at checkout.
One point of contact
We handle repairs with the maker and keep you updated on progress.
Questions before you buy?
Tell us about your source and the music you listen to, and we will help you decide.
Contact usBuy now →