Almost new ★ HD 660S2 Sennheiser ★ Bonus headphone amplifier
Product details
| Management number | 41661603 | Release Date | 2026/01/20 | List Price | $347.66 | Model Number | 41661603 | ||
|---|---|---|---|---|---|---|---|---|---|
| Category | |||||||||
Purchased new in November 2025.
Selling due to a change in my audio setup.
Thank you.
・Stored indoors in the original box in a dark place (almost new)
・Complete accessories
・Approximately 5 hours of listening (not yet fully broken in)
・For listening, a very wide soundstage
・Sennheiser sound!!
---Main Specifications---
① Wired Headphones
HD 660S2 / Sennheiser
Wired open-back 300Ω
② Bonus Headphone Amplifier
ESY233 / eSYNiC
Supports 16-300Ω
Volume control
Bass Boost function (On/Off)
Charging function (OK for outdoor use)
| Category | Electronics > Headphones & MP3 Players > Headphones |
|---|---|
| Size | N/A |
| Brand | Sennheiser |
| Condition | Like new |
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