€900以下のベスト仕事向けヘッドホン 2026年版

Based on the information provided, here is a summary of the **Sennheiser HD 660S2 (Refurbished Excellent)**: **Product:** Sennheiser HD 660S2 (Refurbished - Excellent Condition) **Category:** High-end wired over-ear headphones **Key Features & Highlights:** * **Sound Signature:** Natural, relaxed, high-fidelity sound with enhanced sub-bass. * **Driver Technology:** Ultra-light aluminum voice coils with a 300-ohm impedance, designed for excellent impulse response and intimate, accurate timbre. * **Condition:** Refurbished to "Excellent" grade, indicating a high-quality, inspected, and restored product. * **Retailer:** Sold by Best Buy, with online delivery or in-store pickup, price matching, and presumably a retailer warranty on the refurbishment. **Performance Ratings (out of 100):** * **Best For Budget:** 33.3 (Not a budget-oriented product) * **Best Total Score:** 22.1 * **Best For Studio:** 21.8 (Likely good for critical listening, but other headphones may score higher for studio-specific needs) * **Weakest Area:** Calls - 10/100 (Not designed for voice calls; a dedicated microphone is not a feature) **Customer Reception:** * **Rating:** 5.0/5 Stars (from 2 reviews, indicating very high satisfaction from early purchasers). **Important Considerations:** * **Price:** Not listed (N/A). The value will depend heavily on the discounted refurbished price. * **Connectivity:** Wired only. Requires a dedicated headphone amplifier or a powerful audio source to properly drive the 300-ohm impedance. * **Use Case:** Ideal for audiophiles and critical listeners seeking a refined, detailed, and bass-enhanced sound. Not suitable for casual mobile use, gaming, or calls. * **Refurbished:** This is a key factor. It offers a significant discount but comes with a manufacturer/retailer refurbishment warranty instead of a full new product warranty. **Bottom Line:** This is a **high-performance, wired audiophile headphone** sold in refurbished condition. Its excellent sound quality is reflected in the perfect customer rating. The low scores in "Budget," "Total," and "Studio" likely mean it's not the *absolute top-ranked* pick in those specific, broad categories, but it excels in its niche. The **"Calls" score confirms it's purely for music/listening.** **Purchase decision should hinge on:** 1. The actual refurbished price compared to new. 2. Your need for a wired, high-impedance headphone and having the proper amplifier. 3. Your comfort with purchasing a refurbished premium product from a reputable retailer.