Description
The HD 650 has long been a benchmark for engineers and audiophiles who need to hear exactly what’s in the mix, not a flattering version of it. This listing is for a used pair, previously owned but fully functional, offering that same open, natural tonality at a lower price point of entry.
Because the HD 650 uses an open-back, dynamic design, it’s not built for sound isolation in a live room or DJ booth. Where it earns its reputation is at the desk: track prep, critical mixdown checks, mastering reference, or simply long home listening sessions where comfort and accuracy matter more than noise blocking. The elliptical earcups follow the natural shape of the ear, and the acoustic silk damping keeps attenuation even across the frequency range, so fatigue stays low even during marathon sessions.
Build quality reflects the titanium/silver finish and hand-matched driver pairs (within 1 dB tolerance) that Sennheiser used on the original units. The detachable cable is Kevlar-reinforced OFC copper, chosen to minimize handling noise so movement at the desk doesn’t translate into audible cable noise through the drivers.
- Open, dynamic transducer with lightweight aluminium voice coils for fast transient response
- Frequency response: 10 Hz – 39,500 Hz
- Nominal impedance: 300 ohms
- SPL: 103 dB (1 Vrms); THD: 0.05%
- 9.8 ft. (3m) detachable cable, 6.3/3.5mm stereo jack
- Weight without cable: approx. 9.2 oz. (260g)
Sold as used; functionally tested and ready for studio or home reference duty.
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