Erzetich Audio

Erzetich Audio is a boutique Slovenian maker of handcrafted headphones and headphone amplifiers. Built in small batches, their designs merge solid engineering—dual-mono Class-A stages, balanced Class-AB circuits, and relay-based volume control—with distinctive materials like aged linden wood and aluminium. The result is personal-audio gear voiced for long-term listening: clean, dynamic, and emotionally engaging.

Origin and Philosophy

From a workshop in western Slovenia, Erzetich blends craft, measurement, and musician input to create products that endure. Each unit is hand-built, tested by ear, and verified on the bench. Design priorities include clarity, reliability, and serviceability, with quality components, robust power supplies, and short, clean signal paths. Aluminium chassis and locally sourced tonewoods add both durability and character, supporting the goal of equipment that steps aside so the music takes centre stage.

Product Line up

Erzetich’s amplifier range spans varied topologies and voicings. Bacillus II offers a warm Class-AB entry point, with Bacillus II+ adding fully balanced capability. Perfidus delivers fast, precise Class-A, while Deimos is a dual-mono Class-A design with relay volume control and a spacious, neutral sound. Scylla takes that formula fully balanced, and legacy models include the linden-wood Bacillus Tilia and hybrid Medousa.

Their headphones range from the portable on-ear Thalia to the semi-open Mania with titanium-coated drivers, the open planar-magnetic Phobos, and the flagship Charybdis—planar-magnetic with CNC-milled aluminium cups and carbon-fibre headband for scale and precision.

Origin and Philosophy

From a workshop in western Slovenia, Erzetich blends craft, measurement, and musician input to create products that endure. Each unit is hand-built, tested by ear, and verified on the bench. Design priorities include clarity, reliability, and serviceability, with quality components, robust power supplies, and short, clean signal paths. Aluminium chassis and locally sourced tonewoods add both durability and character, supporting the goal of equipment that steps aside so the music takes centre stage.

Product Line up

Erzetich’s amplifier range spans varied topologies and voicings. Bacillus II offers a warm Class-AB entry point, with Bacillus II+ adding fully balanced capability. Perfidus delivers fast, precise Class-A, while Deimos is a dual-mono Class-A design with relay volume control and a spacious, neutral sound. Scylla takes that formula fully balanced, and legacy models include the linden-wood Bacillus Tilia and hybrid Medousa.

Their headphones range from the portable on-ear Thalia to the semi-open Mania with titanium-coated drivers, the open planar-magnetic Phobos, and the flagship Charybdis—planar-magnetic with CNC-milled aluminium cups and carbon-fibre headband for scale and precision.

Charybdis

Flagship planar-magnetic headphones with CNC-milled aluminium cups, carbon-fibre headband, and large drivers for wide, smooth, and controlled sound. Tuned for mature, natural presentation, revealing fine detail without colouration. Available in silver or black for experienced listeners seeking long-term enjoyment.

Erzetich’s Charybdis brings flagship planar-magnetic performance to a striking, open-back design. CNC-milled aluminium cups and a carbon-fibre headband combine strength, comfort, and distinctive style, while large planar drivers deliver wide, smooth, and highly controlled sound. Tuned for a mature, natural presentation, it reveals fine detail without adding its own colour, letting the music take centre stage. Available in silver or black, Charybdis is built for experienced listeners seeking uncompromised, long-term enjoyment.

Phobos

Planar-magnetic headphones with octagonal resin and aluminium cups, carbon-fibre headband, and 100 mm drivers for analytical detail and balance. V2024 version refines geometry for greater control and focus, delivering an immersive, articulate sound across genres.

Erzetich’s Phobos combines bold design with high-end planar-magnetic performance. Its distinctive octagonal cups are crafted from matte black resin and CNC-milled aluminium, paired with a carbon-fibre headband for strength and comfort. Large 100 mm planar drivers deliver an analytically detailed, firm, and balanced sound, ideal for uncovering nuance across genres from classical to jazz. The latest V2024 version refines the inner geometry for greater control and focus, bringing an even more immersive and articulate listening experience.

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Mania

Semi-open headphones with resin and aluminium cups, 50 mm titanium-coated drivers, and a balanced, slightly dark yet detailed sound. The V2024 update improves geometry for enhanced control and versatility, suiting a wide range of music styles.

Erzetich’s Mania blends timeless style with dynamic, engaging sound. Its semi-open cups, now crafted from resin and CNC-milled aluminium, house 50 mm titanium-coated dynamic drivers tuned for a balanced, slightly dark yet detailed character. Designed for versatility, Mania handles shifts in genre and tempo with ease, making it ideal for varied listening. The latest V2024 version refines cup geometry for greater uniformity and control, delivering an even more robust and expressive performance.

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Thalia

Portable on-ear headphones weighing just 280 g, with open resin cups, carbon-fibre headband, and 40 mm titanium-coated drivers tuned for portable devices. Includes a detachable 8-core silver-plated copper cable. Available in black, silver, or custom finishes.

Erzetich’s Thalia brings high-end sound to a truly portable, on-ear design. Lightweight at just 280 g, its open resin cups and carbon-fibre headband create a distinctive aesthetic while ensuring comfort on the move. Inside, 40 mm titanium-coated dynamic drivers are tuned for portable devices, delivering controlled bass, velvety mids, and detailed highs. The octagonal cups are paired with a detachable 8-core silver-plated copper cable, combining style, durability, and sonic clarity. Available in black, silver, or custom finishes.

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Scylla

Fully balanced, dual-mono Class-A amplifier with steel/aluminium chassis, 80-step relay volume control, and high power reserves. Drives 8–600 ohm headphones with a vast, uniform soundstage and natural balance, pairing perfectly with Charybdis.

Erzetich’s Scylla is a fully balanced, dual-mono Class-A headphone amplifier built for absolute control and neutrality. Its steel and aluminium chassis houses precision circuitry, including an 80-step relay-based volume control and massive power-supply reserves, ensuring effortless drive for headphones from 8 to 600 ohms. Delivering a vast, uniform soundstage with natural balance, Scylla pairs seamlessly with top-tier headphones—especially Erzetich’s Charybdis—for a listening experience that is immersive, expansive, and free from colouration.

Deimos

Dual-mono Class-A amplifier with steel/aluminium chassis, relay-based volume control, silver-plated wiring, and strong power reserves. Offers natural, wide sound with fast transients, suiting both dynamic and planar-magnetic headphones.

Erzetich’s Deimos is a dual-mono Class-A headphone amplifier crafted for serious audiophiles seeking precision and musicality. Built in a steel and aluminium chassis, it features an 80-step relay-based volume control, silver-plated internal wiring, and substantial power reserves for effortless drive across 8–600 ohm headphones. Delivering a natural, wide sound with fast transients, Deimos reveals fine detail and maintains perfect balance from lows to highs, making it equally at home with dynamic or planar-magnetic designs.

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Perfidus

Solid-state Class-A amplifier in a compact aluminium chassis with bright, quick character, excellent resolution, and dynamic punch. Slight lower-mid warmth complements its 4 Hz–40 kHz clean response for lively, detailed playback.

Erzetich’s Perfidus is a solid-state Class-A headphone amplifier with the power and precision to handle any dynamic or planar-magnetic headphones. Built in a compact aluminium chassis, it delivers a bright, quick character with impressive resolution, speed, and dynamic punch. Its flat 4 Hz–40 kHz response ensures clean detail across the spectrum, while a slightly emphasised lower midrange adds warmth and presence. Designed for accuracy without losing musicality, Perfidus brings live energy and clarity to every performance.

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Bacillus II +

Fully balanced, dual-mono Class-AB amplifier with triple-reinforced power supply for clarity and control. Features balanced/unbalanced I/O, steel chassis with wooden sides, and a detailed, fast sound without harshness.

Erzetich’s Bacillus II+ is a fully balanced, dual-mono Class-AB headphone amplifier that builds on the Bacillus II with greater speed, power, and separation. A triple-reinforced power supply, dedicated to each channel and auxiliary circuits, ensures exceptional clarity and control. Balanced and unbalanced inputs and outputs provide flexibility, while the steel chassis with wooden side panels offers durability and a signature look. Detailed and fast without harshness, Bacillus II+ is a compact yet powerful partner for a wide range of headphones.

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Bacillus II

Compact Class-AB amplifier with high-grade capacitors and premium op-amps, delivering a silky-neutral, slightly warm sound. Versatile for 8–600 ohm headphones, with metal chassis, wooden sides, and smooth, dynamic performance.

Erzetich’s Bacillus II is a compact Class-AB headphone amplifier that blends warmth, speed, and detail in a stylish desktop design. High-grade input capacitors and premium op-amps deliver a silky-neutral character with a hint of warmth, making it versatile for headphones from 8 to 600 ohms. Able to reveal subtle nuances and tonal variation, it offers a smooth yet dynamic presentation. Housed in a metal chassis with wooden side panels, Bacillus II brings both performance and elegance to smaller setups.

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Book a Consultation

Curious whether Erzetich is right for you? Book a consultation to explore the design philosophy, system matching, and performance of each model. We’ll help you determine the best fit based on your room, preferences, and listening priorities.

Technology & Design Approach

Erzetich amplifiers and headphones are built to unite distinctive craftsmanship with precise engineering. Every detail—from circuit topology to material choice—is refined to deliver engaging sound, lasting durability, and a clear sense of musical presence.

PURPOSE-BUILT CIRCUIT TOPOLOGIES

Each amplifier is designed for its intended sonic character, from warm Class-AB to fast, transparent Class-A. Fully balanced and dual-mono configurations are employed where they offer real performance benefits, ensuring low noise, channel separation, and dynamic stability.

MATERIALS WITH CHARACTER

Erzetich uses aluminium for structural strength and shielding, locally sourced linden wood for natural damping, and carbon-fibre accents on select models. Each material is chosen for both its acoustic benefits and its ability to give every product a distinctive, handcrafted look.

DRIVER AND ACOUSTIC PAIRING

Headphones are tuned around their chosen driver type—dynamic or planar magnetic—to achieve the desired balance of tone, resolution, and spatial presentation. Cup design, damping, and venting are optimised to support each model’s sonic goals.

FINISH AND HANDCRAFTING

All products are hand-assembled and finished in Slovenia, combining precision manufacturing with artisanal detail. Natural wood grains, anodised metalwork, and carefully applied coatings ensure each piece is as individual as its owner.

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