At a glance
- Design
- Open
- Driver
- Electrostatic
- Headphone connector
- Proprietary (system)
- Amplification needs
- Electrostatic amplifier required
Warwick Acoustics Aperio
The Warwick Acoustics APERIO combines electrostatic reference technology, uncompromising amplification and an integrated high-end DAC into one of the world's most extraordinary headphone systems.
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At a glance
- Design
- Open
- Driver
- Electrostatic
- Headphone connector
- Proprietary (system)
- Amplification needs
- Electrostatic amplifier required
Warwick Acoustics APERIO
Electrostatic reference headphone system with DAC, preamplifier and Class-A energizer
Some high-end products improve on an existing idea. Others redefine what is possible. The Warwick Acoustics APERIO firmly belongs to the latter category.
APERIO is not a headphone that simply happens to be paired with a suitable amplifier. It is a fully integrated reference system consisting of an electrostatic headphone, DAC, preamplifier and Class-A energizer, all designed together as a single platform.
For listeners who are no longer looking for a better headphone, but for a final destination.
At a glance: what makes APERIO special
- Fully integrated system combining headphone, DAC, preamplifier and energizer
- Patented BD-HPEL electrostatic driver technology
- Open-back circumaural design with exceptionally low distortion
- Dual-mono DAC architecture supporting PCM up to 32-bit / 384 kHz and DSD256
- Discrete, fully balanced Class-A MOSFET energizer
- Can serve as both an uncompromising headphone system and a premium DAC/preamplifier
- Magnesium earcups, Cabretta leather earpads and flagship-level craftsmanship throughout
The Absolute Sound
“The finest headphone system I’ve ever had in my home.”
A Complete System Rather Than a Collection of Components
Many of the world's finest headphones are exceptional transducers. Their ultimate performance, however, depends heavily on the amplifier, DAC and source chosen to drive them. Warwick Acoustics removes that uncertainty entirely with APERIO.
The headphone, high-voltage energizer, amplification stage, digital conversion and analogue circuitry were designed together from the very beginning. The result is a level of coherence, control and consistency that traditional component-based systems struggle to achieve.
Why this matters
APERIO does not require endless experimentation with cables, amplifiers or DACs. It has already been engineered as a complete reference platform, creating a controlled signal path from input to diaphragm.
Patented BD-HPEL Technology
At the heart of APERIO lies Warwick Acoustics' proprietary Balanced-Drive High Precision Electrostatic Laminate driver, better known as BD-HPEL. This technology combines the speed and transparency of electrostatic transducers with remarkable control, stability and exceptionally low distortion.
What you hear
- Extremely fast transient response
- Microscopic detail retrieval without artificial sharpness
- Exceptionally low distortion levels
- Highly precise placement of instruments and voices
- Large, natural and open soundstage presentation
APERIO does not impress through exaggerated effects. Instead, it captivates through transparency, ease and a sense of effortlessness. Tiny details are not artificially highlighted—they simply emerge naturally from the recording.
Sound: Neutral, Fast, Spacious and Effortless
APERIO is not designed for listeners looking for added warmth, elevated bass or enhanced treble. It is designed for those who want to hear exactly what is contained within a recording.
Voices appear tangible and lifelike. Instruments retain their natural body and texture while remaining perfectly separated. Room ambience, reverberation trails and the finest dynamic nuances are reproduced with a realism more commonly associated with world-class loudspeaker systems.
HiFi+
“One of the most breathtaking headphone listening experiences I have ever enjoyed.”
Particularly impressive is the combination of electrostatic speed and genuine low-frequency authority. APERIO never sounds thin, sterile or clinical. Instead, it delivers bass with precision, control and realism, complementing the system's extraordinary transparency.
The Integrated DAC
The DAC inside APERIO is not a convenient extra. It is a fundamental part of the entire architecture. Warwick Acoustics employs a sophisticated dual-mono design capable of handling high-resolution digital audio with exceptional accuracy.
Digital capabilities
- Dual-mono DAC architecture
- PCM playback up to 32-bit / 384 kHz
- DSD playback up to DSD256
- 64-bit signal processing
- Careful separation of digital and analogue stages
Analogue inputs are also provided, allowing APERIO to integrate premium external sources while maintaining the integrity of the overall system design.
Class-A Energizer Designed for Electrostatic Control
Electrostatic drivers demand a very different approach to amplification than conventional headphones. APERIO therefore employs a dedicated, discrete, fully balanced Class-A MOSFET energizer, designed specifically for Warwick's BD-HPEL drivers.
Control down to the diaphragm
The energizer supplies the voltage, stability and precision required for the drivers to realise their full potential, preserving their extraordinary speed and transparency under all listening conditions.
This intimate relationship between driver and electronics is one of the primary reasons APERIO sounds so composed and effortless, even during the most demanding musical passages.
More Than a Headphone System
APERIO can also function as a premium DAC and preamplifier within a high-end speaker-based system. Its analogue outputs allow direct integration with power amplifiers, active loudspeakers and reference-level audio chains.
Connectivity
- Digital inputs: USB Audio, AES/EBU, S/PDIF coaxial, Ethernet
- Analogue inputs: Balanced XLR and Unbalanced RCA
- Analogue outputs: Balanced XLR and Unbalanced RCA
Comfort and Craftsmanship
Despite its uncompromising technical ambitions, APERIO remains remarkably comfortable. Lightweight magnesium earcups and luxurious Cabretta leather earpads allow for long listening sessions without fatigue.
The overall construction reflects the philosophy of the system itself: precise, elegant and built without compromise.
Who is APERIO for?
Music lovers, mastering engineers and uncompromising headphone enthusiasts seeking a complete reference solution. Not for endless system matching, but for finally reaching the destination.
Technical Specifications
| Model | Warwick Acoustics APERIO |
| System Type | Electrostatic reference headphone system |
| Design | Open-back, circumaural |
| Driver Technology | Balanced-Drive High Precision Electrostatic Laminate, BD-HPEL |
| Diaphragm Area | 3570 mm² |
| Frequency Response | 10 Hz – 60 kHz |
| Headphone Weight | approx. 405 g |
| Ear Cup Material | Magnesium |
| Earpads | Cabretta sheepskin leather |
| DAC Architecture | Dual-mono 32-bit / 384 kHz DAC architecture with balanced outputs |
| PCM Support | up to 32-bit / 384 kHz |
| DSD Support | up to DSD256, native and DoP |
| Signal Processing | 64-bit signal processing |
| Amplifier / Energizer | Discrete Class-A MOSFET energizer, dual-mono, fully balanced architecture |
| Bias Voltage | 1800 VDC |
| THD+N | < 0.001% |
| Bandwidth | > 65 kHz |
| Digital Inputs |
|
| Analogue Inputs |
|
| Analogue Outputs |
|
Measurements
Frequency response
What does this mean?
The line marked as target is something you could call the “ideal” curve: a target response derived from research by the Harman group, exploring what kind of headphone tuning tends to be preferred by a broad range of listeners – regardless of age or demographics. This is often referred to as the Harman Target.
From left to right you see sub-bass, bass, mids, and then the curve tilts upward where treble begins. That part of the spectrum is naturally amplified by the shape of the human ear.
Sub-bass sits slightly below the target, the bass follows the target curve. The lower mids are neutral, the presence region around 3 kHz sits slightly below the target. The treble is slightly tuned more relaxed – never sharp, easy over long sessions, and the range above 10 kHz stays on the curve.
Harman Research: The Perception and Measurement of Headphone Sound Quality – What Do Listeners Prefer?
WAR-APERIO
Data sheet
- Design
- Open
- Driver
- Electrostatic
- Amplification needs
- Electrostatic amplifier required
- Headphone connector
- Proprietary (system)
- Weight
- 405 g
- Product type
- Headphones
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