Sennheiser HD 25 Professional On-Ear Monitoring Headphones

The Sennheiser HD 25 has earned legendary status among DJs, broadcast engineers, and ENG professionals since its introduction in 1988 — and remains in continuous production today. Closed-back, on-ear design with exceptional passive noise isolation and high SPL handling (up to 120 dB) makes it the benchmark for professional monitoring in loud environments: on stage, in the DJ booth, in a broadcast truck, or out in the field.

Originally designed for sound engineers, the HD 25 became the definitive DJ headphone — chosen for its combination of isolation, compact design, and durability. Its shielding was so effective it was selected as the headphone of choice aboard British Airways' Concorde. The rotating left ear cup allows single-ear monitoring and cueing without removing the headphones. The split headband delivers strong clamping force and a secure fit during long sets. All key parts are field-replaceable — a critical advantage for touring and broadcast professionals.

Sound character is punchy and detailed with defined mids and highs, optimised for transient clarity — making it easy to detect attacks, match levels, and lock in mixes even in bass-heavy environments.

Technical specifications:

• Transducer type: Dynamic | System: Closed-back | Wearing style: On-ear
• Impedance: 70 ohm
• Frequency range: 16Hz – 22,000Hz
• Max SPL: 120 dB (1kHz, 1Vrms)
• Total harmonic distortion: <0.3% at 1kHz
• Max input level: 200mW
• Weight: 140g (without cable)
• Cable: 1.5m detachable single-sided cable, replaceable
• Connector: 3.5mm jack plug | 6.3mm screw-on adapter included
• Assembled in Europe

Sennheiser part number 506909. Supplied with Sennheiser's 2-year warranty.

Spare parts available: Genuine HD 25 replacement parts including cables, ear cushions and headbands are available from sennprospares.co.uk — Showcomms' dedicated Sennheiser spare parts site.

Authorised Sennheiser Dealer: Showcomms Ltd is an authorised Sennheiser dealer with over 20 years' experience supplying professional audio and communications equipment to broadcast, events and production professionals.