Extended Sub-Bass Response — Deeper, Controlled, Precise

The HD 660S2 advances the legendary 600-series sound signature with extended sub-bass response while maintaining tight, controlled delivery. This deeper bass foundation adds space, weight, and emotion to your music without sacrificing balance across the mids and highs.

Perfect for genres that demand low-end authority: electronic, hip-hop, cinematic scores, and modern productions. A meaningful upgrade over the original HD 660S for listeners seeking fuller sonic presentation.

Four pillars of reference-grade listening that separate the HD 660S2 from mainstream headphones.

The Sennheiser Sound Signature — Intimate & Non-Fatiguing

The HD 660S2 delivers the intimate, relaxed sound signature that defines Sennheiser's flagship 600-series headphones. Its natural, balanced tuning keeps the listening experience smooth without harshness or fatigue — even after hours of use.

This warm, audiophile-grade precision makes the HD 660S2 the perfect choice for music streaming, critical mixing in untreated home studios, and long studio sessions where accuracy and comfort must coexist.

Explore more premium headphones or browse the complete Sennheiser collection at AX Store Kuwait.

Precision, Speed & Resolution for Critical Work

The HD 660S2 advances Sennheiser's high-end driver technology with a revised coil, higher magnetic force, improved electrical dampening, and optimized airflow within the acoustic chamber.

The result: cleaner impulse response, faster transients, and a detailed yet emotionally engaging headphone built for serious audio work, reference listening, and discovering new layers in your favorite recordings.

Ideal for music producers working in audio interfaces or audiophiles building their reference listening chain in Kuwait.

Do I need a headphone amplifier for the HD 660S2?

Yes, the HD 660S2's 300 Ohm impedance requires a quality headphone amplifier or DAC to unlock its full dynamics, detail, and sub-bass extension. While it will work with some devices directly, a dedicated amp is highly recommended for optimal performance.

How does the HD 660S2 compare to the original HD 660S?

The HD 660S2 features extended sub-bass response, revised coil design, higher magnetic force, and improved electrical dampening. These upgrades deliver deeper low-end reach, faster transients, and cleaner impulse response while maintaining the natural Sennheiser sound signature.

Are open-back headphones suitable for Kuwait's climate?

Yes, the HD 660S2's open-back design and breathable velour earpads actually make it more comfortable in warmer climates by reducing heat buildup and ear pressure. However, open-back headphones leak sound, so they're best used in quiet home or studio environments.

Can I use the HD 660S2 for gaming?

Absolutely. The open-back soundstage provides excellent spatial awareness for competitive gaming, and the extended sub-bass adds immersion. You'll need a separate microphone for voice chat, as the HD 660S2 doesn't have an integrated mic.

What's the difference between HD 660S2 and HD 600/HD 650?

The HD 660S2 shares the 300 Ohm impedance with HD 600/HD 650 but features improved driver technology with extended sub-bass, faster transients, and modern tuning that balances the warmth of HD 650 with the neutrality of HD 600.

Does AX Store Kuwait offer same-day delivery for the HD 660S2?

Yes, the Sennheiser HD 660S2 is in stock at AX Store Kuwait with same-day delivery available across Kuwait. We also offer 14-day returns per our return policy and support via WhatsApp for product questions.

Can I replace the cable and earpads on the HD 660S2?

Yes, the HD 660S2 features a detachable 3.5mm cable and removable velour earpads. You can upgrade to aftermarket cables or replace worn earpads to extend the headphone's lifespan and customize your listening experience.