Amazon|2026/6/24

Prime Day | Sennheiser HD 660S2 Audiophile Open-Back ā€” 44% Off! $449.95 CAD

$449.95$799.95Save 44%
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šŸŽ§ Sennheiser HD 660S2 ā€” Reference Open-Backs at $350 Off

The Sennheiser HD 660S2 is $449.95 CAD ā€” from $799.95, saving $350 (44%). Open-back audiophile headphones, a completely different animal from Bluetooth ANC ā€” these are for desktop amps, audio interfaces, and dedicated listening.

Ultra-light aluminum voice coil with 42mm transducer. Airy highs, rich mids, controlled bass. You can hear individual notes from 27.5Hz piano lows to 60Hz kick drums. The open-back design delivers a wide soundstage with excellent instrument separation. Breathable soft ear pads for fatigue-free listening. Made in Germany and Ireland. Detachable cable.

4.4 stars, 730+ ratings. At $450, Sennheiser's reference open-backs rarely dip this low.

šŸ“¦ Product Gallery

HD 660S2 front

Ear cup detail

Open-back design

Multiple angles

Cable and accessories

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