Audeze LCD-S20

Closed-back planar magnetic headphones

Shut out the noise. Feel every detail.

LCD-S20 delivers Audeze’s unmistakable planar authority in a studio-quiet, closed-back design. If you’ve struggled with closed headphones that sound boxy, smear the low end, or leak into your mic, the LCD-S20 was built to fix those pain points. Its patent‑pending SLAM acoustic system adds visceral, controlled bass while relieving pressure for clarity and comfort—so you can track, mix, create, or simply disappear into your music without compromise.

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Why Audiophiles Choose This Product

• • Sound quality you can trust: 90 mm planar‑magnetic drivers with Fluxor magnet arrays, Fazor waveguides, and Uniforce diaphragms deliver a smooth, slightly warm balance with powerful, clean bass and lifelike detail. Independent reviews highlight its punchy low end and darker treble tilt that stays engaging over long sessions.
• • Engineering that matters: SLAM (Symmetric Linear Acoustic Modulator) uses precision‑tuned channels around the earpad ring to equalize pressure, reduce distortion, and subtly extend bass—Audeze’s latest breakthrough now tailored for planar drivers.
• • Built to work, built to last: A magnesium/aluminum/steel chassis with magnetically attached, user‑replaceable earpads, damped closed cups for real isolation, and a detachable, reversible single‑sided cable that plugs into either earcup.
• • Creator‑friendly compatibility: With 18‑ohm impedance and 93 dB/1 mW sensitivity, LCD‑S20 pairs well with interfaces, mixers, laptops, and dongles; Audeze recommends >250 mW for best headroom. Includes a 2.5 m cable and 3.5–6.3 mm adapter.
• • Uniquely Audeze: The first closed‑back planar in the LCD family to feature SLAM—bringing truly tactile, controlled bass and holographic spatial cues to an isolated design at this tier. Early community impressions praise the isolation and tuning direction.

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What’s Included

• • LCD‑S20 headphones: Closed‑back, over‑ear planar magnetic with SLAM acoustic system
• • Primary cable: 2.5 m (8.2 ft) detachable single‑sided cable
• • Adapter: 3.5 mm to 6.3 mm (1/4 in)
• • Documentation: Quick start and warranty information (varies by region)

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Technical Specifications

Specification	Value	Notes
Product Type	Wired, over‑ear, closed‑back	Detachable single‑sided cable; reversible earcup input
Transducer	Planar magnetic, 90 mm	Uniforce diaphragm for uniform control
Magnet System	Fluxor magnet array (Neodymium N50)	High efficiency and control
Phase Management	Fazor waveguides	Smoother wave propagation for clarity
Acoustic System	SLAM (Symmetric Linear Acoustic Modulator)	Tuned channels relieve pressure and enhance low end
Frequency Response	10 Hz – 40 kHz	Extended bandwidth for high‑res content
THD	<0.1% @ 100 dB SPL, 1 kHz	Low distortion for clean transients
Impedance	18 Ω	Friendly to interfaces and portable sources
Sensitivity	93 dB/1 mW (DRP)	Benefits from ample power headroom
Max Power Handling	5 W RMS	Abundant dynamic ceiling
Recommended Power	>250 mW	Ideal with desktop amps/interfaces
Cable Length	2.5 m (8.2 ft)	Studio‑friendly reach
Connector (source)	3.5 mm with 6.3 mm adapter	Plug‑and‑play with pro gear
Headphone Input	3.5 mm TRRS (Audeze pinout), either cup	Supports custom single‑ended or balanced cables
Weight	550 g	Plush pads and suspension reduce hotspots

Note on cabling: LCD‑S20 uses a specific TRRS pinout at the earcup; typical dual‑entry 3.5 mm “Y” cables won’t work unless built to Audeze’s scheme. Custom single‑ended and balanced cables are supported.

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Professional Recognition

• • Reviews: “Industrial, heavyweight design with robust low end and smooth top.” — Trusted Reviews (paraphrased). “Fun, dynamic sound with punchy bass; excellent isolation.” — Windows Central (paraphrased). PC Gamer notes strong isolation and bass clarity via SLAM, with a darker tilt.
• • Measurements: Third‑party testing reports exceptionally low harmonic distortion for a clean signal.
• • Heritage: Designed and precision‑engineered in Audeze’s California workshop, leveraging long‑standing Fluxor, Fazor, and Uniforce technologies.
• • Innovation: SLAM was introduced by Audeze to deliver more lifelike bass and lower distortion by symmetrically modulating pressure—now implemented in a closed‑back planar for the first time in the LCD line.

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The Bottom Line

LCD‑S20 brings real studio isolation to Audeze’s signature planar sound—authoritative, controlled bass; smooth, non‑fatiguing treble; and low distortion—backed by engineering you can hear. If you need closed‑back focus without giving up immersion or detail, this is the elegant, no‑nonsense tool that makes every take, track, and playlist sound intentional. For best results, pair it with a capable interface or headphone amp that can supply healthy power, and enjoy the confidence of a headphone designed to work—and last—day after day.

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Product‑Specific Notes (Headphones)

• Connectivity: Wired only; no built‑in microphone. Use an external mic for calls or gaming.
• Amplification: Plays from common sources, but Audeze recommends >250 mW for full dynamics and headroom.
• Sound signature: Warm‑tilted with solid, tight bass, smooth mids, and relaxed highs; easy listening for long sessions.
• Comfort: Substantial at 550 g; suspension headband and plush pads distribute weight effectively for extended work.

Sources: official specifications and documentation, Audeze technology brief on SLAM, professional reviews, retailer listings, and Audeze support notes for cabling compatibility.