AudioChainsDB
Sennheiser

HD 599

headphones

$199

Used market: $155*

Manufacturer datasheet

Specifications

4 of 8 values have a recorded source
Connector
3.5 mm + 6.35 mm adapter·
Form Factor
Over-Ear·
Is Closed Back
no·
Impedance ohms
50✓
Transducer Type
Dynamic·
Detachable Cable
yes·
Sensitivity dB V
106✓
Release Year
2016·

Expert Audio Engineering Commentary

Tonal Profile

The consumer open-back that most people meet before they meet the HD 600: 50 Ω, velour pads, a warm lower midrange and a treble that never bites. Sennheiser states the reference in full — «106dB SPL (1kHz/1Vrms)» — which is why nothing here needs interpreting.

Amplification Warning

106 dB from one volt at 50 Ω: a phone dongle reaches deafening levels, so «needs an amplifier» is a myth for this model. What an amplifier does buy is a low output impedance — the HD 599 has a resonance peak, and a 100 Ω motherboard jack audibly tilts the bass.

* Estimated with the depreciation fallback (~78% retained value). · checked on 8/5/2026