Sennheiser HD 660S2 Open-Back Audiophile Wired Headphones - Black

Product Description:
Sennheiser HD 660S2 wired headphones deliver detailed high-fidelity audio with an open-back design, natural soundstage, and enhanced low-frequency extension. The precision-matched 38mm dynamic transducers reproduce clear vocals, detailed instruments, and controlled bass for critical listening, music production, home audio, and audiophile entertainment.

With a 300-ohm impedance, the HD 660S2 is designed for use with capable headphone amplifiers, DACs, audio interfaces, and premium home stereo equipment. Lightweight construction, soft velour ear cushions, and an ergonomic over-ear fit provide lasting comfort during extended listening sessions.

The headphones include both a standard 6.3mm cable and a balanced 4.4mm cable, plus a 3.5mm adapter and protective carrying pouch.

Key Features:

• Premium open-back audiophile headphones
• Detailed, natural sound with enhanced sub-bass response
• Precision-matched 38mm dynamic transducers
• Ultra-light aluminium voice coils
• Wide frequency response from 8Hz to 41,500Hz
• 300-ohm impedance for high-quality amplified listening
• Open ear cups provide a spacious, natural soundstage
• Over-ear design with soft velour ear cushions
• Lightweight 260g construction
• Includes standard and balanced audio cables
• Detachable cable design
• Made in Ireland
• Ideal for critical listening, home audio, mixing, and music enthusiasts

Specifications:

• Brand: Sennheiser
• Product Type: Wired Audiophile Headphones
• Model: HD 660S2
• Colour: Black
• Headphone Style: Over-Ear
• Acoustic Design: Open-Back
• Transducer Type: Dynamic
• Transducer Size: 38mm
• Frequency Response: 8Hz–41,500Hz
• Impedance: 300 Ohms
• Sound Pressure Level: 104dB at 1kHz / 1Vrms
• Total Harmonic Distortion: Less Than 0.04%
• Cable Length: 1.8m
• Connections: 6.3mm Stereo and 4.4mm Balanced
• Adapter: 6.3mm to 3.5mm
• Wireless Connectivity: No
• Noise Cancellation: No
• Weight: Approximately 260g
• Included Components: HD 660S2 Headphones, 6.3mm Cable, 4.4mm Balanced Cable, 3.5mm Adapter and Carrying Pouch
• Condition: New