Sennheiser SC 665 USB-A Stereo Headset - Teams Certified
The Sennheiser SC 665 unplugs from the desk
Most USB headsets are married to whatever computer they're plugged into — pull the cable and you've got an expensive paperweight. The Sennheiser SC 665 breaks that rule: its USB cable detaches, and underneath it is a fully functional analog stereo headset that runs over a 3.5mm jack into a phone or tablet, no computer in the chain at all.
It's the mobile member of Sennheiser's premium "Century" line — the double-sided, stereo sibling of the SC 630 I've written about before, built for people who genuinely split their day between a desk and a phone rather than sitting at one workstation. Both ears covered, an ultra noise-canceling microphone, leatherette CircleFlex ear cups that fold for travel, and Microsoft Teams and Skype for Business certification.
What's different about the Sennheiser SC 665 vs the SC 630?
The Sennheiser SC 665 adds two things the SC 630 doesn't have: stereo sound instead of mono, and a detachable USB cable paired with a 3.5mm jack for mobile use. The SC 630 is a fixed, USB-only, single-ear headset built for the desk; the SC 665 is built to leave it.
Stereo, both ears covered. USB cable detaches; 3.5mm jack works standalone with a phone or tablet. For people splitting time between PC and mobile.
Mono, one ear open. USB direct-connect only, no detachable cable, no mobile option. For a fixed desk setup.
One headset, unplugged from either device
The cable comes off on purpose
This is the feature easy to miss on a spec sheet: the Sennheiser SC 665's USB cable is genuinely detachable, not just coiled out of the way. Take it off, and the 3.5mm jack alone drives the headset from a phone or tablet — useful for someone who's on a Teams call at their desk in the morning and taking calls from a mobile device the rest of the day, without owning two headsets to do it.Does the Sennheiser SC 665 have active noise cancellation?
The noise cancellation on the Sennheiser SC 665 is microphone-side — it strips background noise out of your outgoing voice before it reaches the call. The stereo ear cups give you passive isolation from covering both ears, but there's no active electronic system canceling incoming sound the way ANC headphones do.
Built for a full shift, wherever it happens
[stat]114-inch cable, 3.4 ozThe Sennheiser SC 665 runs a 114-inch cable when connected over USB, long enough to reach across a standing desk or a dual-monitor setup without strain, and the CircleFlex dual-hinge ear cups fold flat for a bag when you're headed out. ActiveGard technology protects against sudden loud spikes on the line, and the leatherette ear cushions are sized for hours of wear rather than a quick call.The Sennheiser SC 665 is the headset for someone who genuinely needs both — a certified Teams headset at the desk in the morning, a standalone stereo headset for a phone or tablet the rest of the day, in one part number instead of two. Detach the cable when you leave the desk, and the same headset follows you, backed by HeadsetPlus's lifetime support.
- Sennheiser SC 665 stereo headset with inline call control unit
- Detachable USB-A cable
- Leatherette ear cushions (fitted, both ears)
- Carrying case
- Quick start guide
| Type | Binaural (stereo, both-ear), over-the-head, on-ear |
|---|---|
| Also sold as | EPOS Impact SC 665, part of the "Century Mobile" line |
| Microphone | Ultra noise-canceling boom mic |
| Noise handling | Microphone-side noise cancellation only; passive isolation from both-ear cushions (not active noise cancellation) |
| Connector | Detachable USB-A cable, plus a built-in 3.5mm jack for standalone mobile use |
| Controls | Inline answer/end, mute, volume |
| Certification | Microsoft Teams and Skype for Business certified; UC optimized for Cisco, Avaya, IBM, and other major platforms |
| Audio | HD wideband audio, frequency range approximately 50–18,000 Hz |
| Ear cups | CircleFlex dual-hinge, foldable; large leatherette cushions |
| Hearing protection | ActiveGard technology — protects against acoustic shock and sudden sound spikes |
| Cable length | 114 in (USB connection) |
| Weight | 3.4 oz (approx. 96 g) |
| Related models | Sennheiser SC 630 (mono, desk-only); Sennheiser SC 665 USB-C (same headset, USB-C connector, different part number) |
| Part number | 1000645 |
| Warranty | 3-year manufacturer warranty, plus HeadsetPlus lifetime technical support |
Software. The Sennheiser SC 665 is certified for Microsoft Teams and Skype for Business, and works with other major UC platforms including Cisco, Avaya, and IBM. No drivers are required over USB.
Hardware. The Sennheiser SC 665 connects two ways: a detachable USB-A cable for PC softphone use, or the built-in 3.5mm jack alone for a phone or tablet with no computer involved. A USB-C version exists under a separate part number for newer laptops.
Platforms. The Sennheiser SC 665 is built for professionals who move between a desk and a mobile device during the day — hybrid workers, field-facing roles, and anyone whose calls don't all come through one machine.
FAQ
Frequently Asked Questions
The Sennheiser SC 665 is stereo with both ears covered and adds a detachable USB cable plus a 3.5mm jack for mobile use. The Sennheiser SC 630 is mono, USB-only, and fixed to a desk. The SC 665 is the mobile version of the same Century build.
Yes. The Sennheiser SC 665's USB cable detaches, leaving a 3.5mm jack that connects directly to a phone or tablet with no computer needed. It's built specifically for people who split their calls between a PC and a mobile device.
The noise cancellation is on the microphone side only, filtering background sound out of your outgoing voice. The Sennheiser SC 665 uses passive isolation from its both-ear cushions, not active noise cancellation for what you hear.
Yes. The Sennheiser SC 665 is certified for both Microsoft Teams and Skype for Business, and is UC optimized for other major platforms including Cisco, Avaya, and IBM.
Yes. The Sennheiser SC 665's USB cable is detachable by design, which is what allows the headset to run standalone over its 3.5mm jack when connected to a phone or tablet instead of a computer.
The Sennheiser SC 665 carries a 3-year manufacturer warranty, in line with the rest of Sennheiser's premium Century line.