Audeze LCD-S20

Audeze LCD-S20: the first closed-back planar headphone with SLAM technology

The LCD-S20 marks a decisive milestone in the evolution of Audeze headphones. This new closed-back model becomes the brand’s first planar headphone to feature SLAM (Symmetric Linear Acoustic Modulator) technology, a patented innovation previously reserved for the high-end CRBN2 electrostatic headphone. As the most affordable LCD headphone ever offered, it opens up Audeze’s studio-quality sound to a new generation of producers, musicians, and audiophiles who require optimal acoustic isolation.

Cutting-edge technology made accessible

The LCD-S20 benefits from SLAM (Symmetric Linear Acoustic Modulator) technology, a pending patented innovation introduced in late 2024 on the flagship CRBN2 electrostatic headphone. This technology uses precisely calibrated acoustic channels to optimize airflow management around the planar diaphragm, significantly improving bass response while enhancing spatial imaging.

The system operates via a symmetric linear acoustic modulator that regulates pressure across the entire 90 mm diaphragm. This approach ensures more linear behavior and greater control of low frequencies, avoiding typical closed-back issues such as boomy bass or unwanted resonance. The result is a more natural and impactful bass reproduction, with depth and dynamics that remain clean even at high volumes.

Advanced technical architecture

Beneath its woven shells lies a 90 mm planar magnetic transducer made in Southern California. It incorporates all of Audeze’s patented technologies: ultra-thin Uniforce diaphragm, Fluxor magnetic structure with N50 neodymium magnets, and Fazor waveguides for phase management. This combination delivers an extended frequency response from 10 Hz to 40 kHz with total harmonic distortion below 0.1% at 100 dB.

With an impedance of 18 ohms and a sensitivity of 93 dB/1mW, the headphone is relatively easy to drive, though dedicated amplification will unlock its full potential. It can handle a maximum sound pressure level above 120 dB, providing ample headroom for any application.

Redesigned construction and ergonomics

The LCD-S20 adopts the proven chassis of the Maxwell, combining a spring steel headband, forged aluminum yokes, and glass-reinforced nylon components. This architecture ensures robustness and durability, with a weight of 550 grams that remains on the higher end for planar headphones. The leather suspension headband and balanced weight distribution minimize fatigue during long sessions.

The earcups are covered with a sophisticated woven fabric that contributes to acoustic isolation. Internal acoustic damping effectively blocks external noise and prevents sound leakage to microphones—a crucial advantage in the recording studio.

Compatibility and ease of use

With its 18-ohm impedance and high-sensitivity drivers, the LCD-S20 works perfectly with a wide range of equipment: audio interfaces, mixing consoles, laptops, and even mobile devices. This versatility makes it a smart choice for creators working in various environments and with different sources.

Audeze’s first-ever magnetic earpad attachment system allows for quick, tool-free replacement and customization. This innovation greatly simplifies maintenance and adaptation to individual preferences. The detachable 2.5-meter cable can be connected to either earcup as needed, offering optimal flexibility for cable management in the studio.

Purpose-built for the studio

The closed-back design of the LCD-S20 makes it the ideal tool for recording and tracking in the studio. Superior bidirectional passive isolation effectively prevents sound leakage to microphones—a crucial asset during vocal or instrumental recording sessions. This isolation also allows you to hear backing tracks with remarkable clarity without needing to raise the volume, thus preserving your hearing during long sessions.

The exceptional transient response of the planar magnetic drivers makes it much easier to perceive timing. This precision allows you to easily follow the click track or drum rhythm, helping musicians and engineers maintain perfect tempo. Ultra-low distortion protects your hearing even at high listening levels, while the ultra-precise impulse response helps you stay perfectly in sync.

Technical Specifications

Detailed Specifications

• Type: closed-back, circumaural
• Transducer: planar magnetic
• Magnetic structure: Fluxor magnet array
• Magnet: N50 neodymium
• Phase management: Fazor
• Acoustic technology: SLAM
• Diaphragm: ultra-thin Uniforce
• Transducer size: 90 mm

Technology and Design

• 90 mm planar magnetic transducer
• SLAM acoustic technology (patent pending) for exclusive acoustic management
• Magnetic structure with Fluxor magnet array
• N50 neodymium magnets for optimal performance
• Fazor phase management
• Ultra-thin Uniforce diaphragm
• Premium construction: magnesium, aluminum, steel

Acoustic Performance

• Frequency response: 10 Hz – 40 kHz
• Maximum sound pressure level: >120 dB
• Total harmonic distortion: <0.1% at 100 dB SPL, 1 kHz
• Dynamic, deep, and controlled bass
• Exceptional clarity even at high volume
• Effective passive isolation with no leakage to microphones
• Accurate reproduction of details and sound spatialization

Connectivity and Compatibility

• Low impedance: 18 ohms
• Sensitivity: 93 dB / 1 mW (@ Drum Ref. Point)
• Maximum power: 5 W RMS
• Recommended power: >250 mW
• Detachable 2.5 m cable
• 3.5 mm to 6.3 mm connector included
• Connection possible on both earcups
• Compatible with audio interfaces, consoles, computers, smartphones

Comfort and Ergonomics

• Weight: 550 g
• Suspended leather headband for optimal comfort
• Ultra-soft gel earpads for extended listening without fatigue
• Easily replaceable magnetic earpads
• Acoustically treated earcups covered with fabric
• Optimal isolation for professional use

Box Contents

• Audeze LCD-S20 closed-back headphones
• 2.5 m headphone cable
• 3.5 mm → 6.3 mm adapter
• Shipping weight: 1.36 kg
• Package dimensions (W x H x D): 24.1 x 25.4 × 12.7 cm