Beste Sennheiser Kopfhörer in 2026

Based on the information provided, here is a summary of the **Sennheiser HD 660S2 (Refurbished)**: **Product:** Sennheiser HD 660S2 - Refurbished Excellent Condition **Category:** Wired Over-Ear Headphones **Retailer:** Best Buy (with Price Match Guarantee) **Key Features & Highlights:** * **Sound Quality:** "Natural, relaxed, high-fidelity sound with extra sub bass." * **Driver Technology:** Ultra-light aluminum voice coil with a **300-ohm impedance**, designed for excellent impulse response, intimate sound, and great timbre. * **Condition:** Refurbished and rated as "Excellent." * **Connectivity:** Wired. **Performance Ratings (out of 100):** * **Best For Budget:** 33.3 * **Best Total Score:** 22.1 * **Best For Studio:** 21.8 * **Weakest Area:** Calls (10.0) **Customer Reception:** * **Rating:** 5.0 out of 5 stars (based on 2 reviews). **Important Notes:** * The **price is not listed** in this data. * These are **high-impedance (300-ohm) headphones**. They will typically require a dedicated headphone amplifier or a powerful audio source to perform optimally and reach their full potential. They are not designed for simple plug-and-play use with phones or low-power devices. * The "Best for" scores suggest they are a relatively niche product, scoring highest in the "budget" category among the listed metrics, but not top-tier in overall or studio use according to this rating system. * They are explicitly **not recommended for call quality**. **Bottom Line:** This is a refurbished, high-quality wired audiophile headphone from a reputable brand (Sennheiser), focused on delivering a refined and bass-enhanced listening experience. It is best suited for users who have the necessary amplifier equipment, are looking for a value option in high-fidelity headphones, and prioritize music listening over any call functionality.