Sennheiser HD 660S2 Open-Back Audiophile Headphones Black | 700240

The Sennheiser HD 660S2 invites you to dive deeper into legendary sound. With a refined open-back design and improved low-end response, these headphones deliver an intimate, natural listening experience with exceptional comfort and precision.

Designed and crafted in Europe, the HD 660S2 combines a powerful vented magnet system, ultra-light aluminium voice coils, and optimized airflow to deliver lifelike dynamics and deep, accurate sub-bass. Its a headphone made for passionate music lovers who demand the purest sound reproduction.

Designed for Real Life

• Open-back design provides a wide and natural soundstage
• Enhanced sub-bass delivers depth and musical impact
• Comfortable velour ear pads for long listening sessions
• Lightweight 260 g frame with even pressure distribution
• 300 impedance ideal for premium headphone amplifiers
• Hand-assembled in Europe with precision craftsmanship

Key Features

• 38 mm dynamic drivers with vented magnet system
• Frequency response: 8 Hz 41,500 Hz
• Impedance: 300 for high-fidelity performance
• Sound pressure level: 104 dB (1 kHz, 1 Vrms)
• Distortion (THD): less than 0.04% (1 kHz, 100 dB)
• Includes 6.3 mm and 4.4 mm balanced cables with adapter