KERN ( reference ) — Model 01

Model 01( open-back )

  • 50mm beryllium-coated driver
  • 40kHz reach · from 10 Hz
  • 150ohm — measured by hand
€1490
Pre-order · 6-week lead
Reserve — Graphite

Free EU shipping · 30-day return · lifetime calibration

Driver50 mm
Impedance150 Ω

KERN ( reference ) — the signal

Nothing between
you and the signal.

An open-back chassis lets the driver breathe. No coloration, no chamber resonance — only what was recorded, rendered whole.

FIG. 02 — driver cross-section

The driver

50mm, beryllium-coated.

A single full-range diaphragm, vapour-deposited with beryllium for stiffness without mass. It moves fast, settles faster, and adds nothing of its own. Each driver is matched to within 0.5 dB of its pair.

FIG. 03 — bench measurement

Measured, not voiced

Flat from 10 to 40k.

No house sound. Every Model 01 is swept on the bench and ships with its own response curve — the one below is a real target, ±2 dB across the band.

10 Hz± 2 dB40 kHz
01One instrument. Built better every year, not replaced.

Specification

Transducer
50 mm dynamic, beryllium-coated
Acoustics
Open-back
Frequency response
10 Hz – 40 kHz
Impedance
150 ohm
Sensitivity
98 dB / mW
THD
< 0.05 % @ 1 kHz
Mass
330 g (no cable)
Cable
1.5 m OFC, 6.3 mm · 3 m optional
Earpads
Replaceable lambskin / velour
In the box
Case, curve sheet, 3.5 mm adapter

Technical notes

  1. Frequency response measured on a calibrated artificial ear (IEC 60318-1); your hearing and seal will vary.
  2. Driver pair matching quoted at 0.5 dB, 100 Hz – 10 kHz, at delivery.
  3. Open-back design offers no passive isolation and is not intended for noisy environments or stage use.
  4. Lead time of six weeks is typical for built-to-order units; configured options may extend it.
  5. Lifetime calibration covers re-measurement and pad replacement; it is not a warranty against misuse.
Model 01 Graphite · €1490 · 6-week lead
Reserve