Sennheiser HD 620S Closed-Back Headphones - Mint - Verified by HiFiLoop
The Audiophile's Hook
The Sennheiser HD 620S is the rare closed-back that still feels open: focused isolation with speaker-like imaging, fast transients, and reference detail that doesn’t collapse your stage. This unit is Mint (99% new) and comes as a full set—flagship listening value, verified by HiFiLoop.
Condition Report (The Truth)
Mint / Collector Quality: Like new with minimal handling marks.
- No obvious cosmetic defects observed.
- Full retail set included (box and accessories as shown in the listing photos).
Mandatory: The device has passed all functional tests.
Sonic Signature & Pairing
HD 620S is designed for distraction-free listening without the “boxed-in” feeling: clear separation, stable imaging, and an airy presentation for a closed-back. It scales noticeably with a clean DAC/amp—tighter control, stronger dynamics, and a darker background.
To unleash the full potential of this device, we recommend pairing it with gear from our Amplifiers & DACs Collection.
Technical Highlights (Mobile-Table)
| Design | Circumaural, closed-back, dynamic |
| Transducer | 42mm angled transducers (38mm diaphragm noted by Sennheiser) |
| Impedance | 150Ω |
| Frequency Response | 6 Hz – 30 kHz |
| Weight | 326 g (without cable) |
| Cable | Detachable 1.8m cable, 3.5mm plug + screw-on 6.3mm adapter |
What's in the Box
- Sennheiser HD 620S closed-back headphones
- Detachable 1.8m cable (3.5mm)
- 3.5mm to 6.3mm screw-on adapter
- Storage pouch (if shown in photos)
- Retail box and accessories (as pictured)
Why Buy Used from HiFiLoop?
- ✅ 14-Day DOA: Full refund/replace if dead on arrival.
- 🔧 180-Day Warranty: Free repair service (buyer pays return shipping).
- 🔬 Lab Tested: I/O, noise floor, channel balance verified.
- 📦 Free Shipping: On orders over $199.
See full Grading Scale in Footer Condition Guide.
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Condition Report
See details in the description above.
Shipping & Warranty
Processing Time:
Please allow 3-5 business days for order processing. We perform a final rigorous audio test, functional inspection, and deep cleaning to ensure the device is in perfect condition before dispatch.
Shipping Method:
We use reliable International Priority Lines. Tracking numbers are provided once the item is dispatched.
Estimated Delivery:
7-15 business days to most destinations (USA, Europe, etc.).
Warranty & Support:
We stand behind our quality with a 180-Day Warranty.
- 0-14 Days: Full refund or replacement for any functional defects upon arrival.
- 15-180 Days: Free repair service for hardware issues (Buyer is responsible for return shipping costs and any applicable customs duties or taxes).
Tech Specs
Refer to official manufacturer specifications.