Sonance APEX-1 Reference Headphones
Precision Audio Engineering

Sound. Engineered To Perfection.

Studio monitors, headphones, and DACs crafted in Berlin for those who hear beyond the ordinary.

Explore Collection
The Collection

Precision
Instruments

APEX-1 Reference Headphones
Flagship

APEX-1 Reference

Open-back planar magnetic headphones with sub-bass authority and holographic imaging.

Driver
Planar Magnetic
Impedance
32 Ω
Response
5–50kHz
Weight
385g
MONOLITH-5 Studio Monitor
Studio Monitor

MONOLITH-5

5" coaxial nearfield monitor.

Power
200W Bi-amp
Response
39–30kHz
FLUX DAC/Amp
DAC / Amplifier

FLUX D/A

Reference DAC + headphone amp.

DAC Chip
ESS 9038PRO
THD+N
0.0003%
Inside the Sonance acoustic lab
Acoustic Research Lab · Kreuzberg, Berlin
01

Accuracy Is
Not Clinical

We reject the idea that flat response means flat emotion. Our planar magnetic drivers reproduce transients with microsecond precision while preserving the harmonic richness that makes music breathe. Every frequency curve is tuned by ear, then verified by measurement — never the reverse.

02

Materials
Are Memory

The cushions on the APEX-1 use memory foam laminated with Alcantara sourced from the same Italian mill that supplies high-end automotive ateliers. The headband uses a titanium-core wire, hand-wrapped in vegetable-tanned leather that ages with you. These are instruments you form a relationship with.

03

Circuit
Intention

The FLUX D/A uses fully balanced, discrete Class-A topology from input to output. No op-amps. No IC-based volume control. Every gain stage is hand-matched with 0.1% tolerance resistors, and the analog output stage runs in pure Class-A, biased hot, delivering the resigned warmth that defines our house sound.

Performance Data

APEX-1 Reference
In Numbers

APEX-1
Frequency Response
5 Hz — 50 kHz
Sub-bass Midrange Treble Air
Total Harmonic Distortion
0%
THD @ 1kHz / 94dB
Industry-reference distortion floor for transparent monitoring.
Impedance
0 Ω
Nominal
Drivable from any source — portable to reference amplifier.
Sensitivity
0 dB
SPL @ 1mW
High efficiency with planar magnetic authority.
Planar Driver Area
0mm × 90mm
Rectangular Ribbon
Large-area planar driver for sub-bass extensibility and transient acceleration.
Mass
0g
Without Cable
Titanium-reinforced headband, magnesium cups — light without compromise.
Cable Topology
4-core OFC
Detachable · Balanced
High-purity oxygen-free copper with Kevlar-reinforced shielding.
DAC Compatibility
FLUX D/A
Reference Pairing
Optimized impedance matching for the full Sonance signal chain.
Heritage

Born In
Berlin

From a Kreuzberg workshop to reference studios worldwide — three decades of obsessive audio craft.

1994

The First Workshop

Acoustics engineer Malte Richter converts a former machine shop in Kreuzberg into a speaker prototyping lab. The first Sonance monitor is a two-way bookshelf speaker built from hand-selected Scandinavian drivers and a Baltic birch enclosure.

Early Sonance workshop
2003

MONOLITH Reference Series

After nearly a decade of studio monitor iteration, the MONOLITH-5 debuts at AES Berlin. Its coaxial driver topology — a Sonance signature — earns immediate adoption by mastering engineers across Europe. The distinctive brushed-aluminium front baffle becomes iconic.

2012

APEX Headphone Division

Richter recruits a team of Japanese driver engineers and opens a dedicated headphone R&D space in Prenzlauer Berg. The mission: adapt planar magnetic technology from studio monitors into a headphone form factor without sonic compromise.

APEX R&D headset prototype
2018

FLUX Digital Division

Recognizing that the signal chain matters as much as the transducer, Sonance launches the FLUX division. The first product — a R2R ladder DAC with fully discrete analog output — ships to a two-year waitlist. Reviewers call it "the missing link."

2024

APEX-1 Reference

The culmination of twelve years of headphone research. The APEX-1 Reference features a custom rectangular planar driver, titanium-core headband, and Alcantara ear cushions. It is the first headphone to earn a perfect score from three independent audio publications simultaneously — andSonance's proudest moment.

APEX-1 Reference headphones