EPOS Sennheiser SC 660 USB ML Headset

83%

Microphone Quality

Call Audio Clarity

Build Quality

Comfort & Wearability

Value for Money

Noise Cancellation

Cable & Connectivity

In-Line Controls

Setup & Compatibility

Portability

Long-Term Durability

UC Platform Integration

Overview

The EPOS Sennheiser SC 660 USB ML Headset is a professional-grade, double-sided USB headset built squarely for unified communications environments, particularly Skype for Business deployments. A quick note on the branding: EPOS took over Sennheiser's enterprise audio division a few years back, so you will still find the Sennheiser name on legacy stock and documentation — both refer to the same lineage. What strikes you immediately is the build quality: stainless steel hinges, brushed aluminum accents, and Vectran-reinforced cables are not features you typically find at this price tier. The included hard carry case is a small but practical touch. Value here is really about daily reliability over years, not cost-per-feature comparisons with cheaper consumer alternatives.

Features & Benefits

The noise-cancelling microphone is genuinely where this dual-ear UC headset earns its reputation. In an open-plan office or a noisy home setup, the difference between a mic that captures everything around you and one that isolates your voice is not subtle — colleagues and clients notice it immediately. The neodymium speaker drivers deliver clear, natural voice reproduction; do not expect studio-level fidelity for music, but for calls and web conferences the audio is crisp and fatigue-free. The in-line control unit handles muting, volume, and call management without touching your computer, which sounds minor until you are mid-conversation and need to mute fast. The Easy Disconnect cable release is a genuine time-saver in shared-desk environments.

Best For

This business headset is a strong fit for contact center professionals and customer support teams who spend most of their workday on calls — the dual-ear design blocks outside distractions and the mic handles the talking. Remote and hybrid workers who hop between video calls throughout the day will appreciate how quickly it connects and disconnects without fuss. IT procurement teams will find the 2-year warranty, certified UC compatibility, and robust build materials easier to justify across a fleet of shared workstations than a consumer-oriented alternative. If you regularly carry your headset between offices, the included hard case earns its keep fast. Casual or occasional users may find the price harder to rationalize.

User Feedback

People who use the SC 660 USB ML daily tend to land on a few consistent points. Microphone quality on calls gets frequent praise — callers on the other end report noticeably cleaner audio compared to cheaper alternatives. The easy-disconnect mechanism also resonates strongly with shared-desk users who describe it as a small feature that changes their daily routine in a real way. On the critical side, on-ear fatigue comes up regularly; after four or five hours, the pressure becomes noticeable in a way over-ear designs avoid. USB-only connectivity frustrates anyone trying to use it with a tablet or non-standard workstation. IT buyers evaluating this for fleet purchases tend to be more satisfied overall than individual end users weighing personal comfort against the premium cost.

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Pros

Noise-cancelling mic consistently delivers clean, isolated voice pickup even in loud office environments.
Stainless steel hinges and Vectran-reinforced cables hold up noticeably better than plastic-only competitors over time.
The in-line control unit handles muting, volume, and call management without ever touching your computer.
Easy Disconnect quick-release mechanism is a practical time-saver in hot-desk and shift-change setups.
Plug-and-play USB connectivity means zero driver headaches across most modern Windows workstations.
The two-year warranty covering accessories — not just the headset — adds real value for IT fleet purchases.
Included hard carry case protects the headset during transport between offices or on the road.
Double-sided design effectively blocks ambient distractions, helping users stay focused during long call sessions.
Neodymium drivers produce clear, natural voice reproduction that makes calls noticeably easier to follow.

Cons

On-ear pressure builds up over multi-hour sessions, making extended daily wear uncomfortable for some users.
USB-only connectivity rules out use with tablets, smartphones, or workstations with limited USB availability.
The premium price point is difficult to rationalize for workers who are only on calls occasionally.
Audio performance for music or media is strictly adequate — this is a voice tool, not a listening device.
The EPOS and Sennheiser co-branding creates genuine confusion at purchase, especially for buyers comparing models across product generations.
At nearly 8 oz, the weight becomes more apparent during long shifts than lighter single-ear alternatives.
Users outside Microsoft-centric UC environments may not benefit from the Skype for Business certification.
No wireless option in this model means cable management remains an ongoing minor annoyance at the desk.

Ratings

The EPOS Sennheiser SC 660 USB ML Headset scores below were generated by our AI system after analyzing thousands of verified buyer reviews collected globally, with spam, bot-driven submissions, and incentivized feedback actively filtered out before any scoring took place. The analysis draws from a wide cross-section of real users — contact center agents, remote professionals, and IT procurement teams — ensuring both genuine strengths and recurring friction points are represented honestly. Whether this business headset fits your specific workflow or falls short, the ratings below give you an unvarnished picture.

Microphone Quality

88%

Call recipients consistently report hearing voices cleanly even in noisy open-plan offices or busy home setups. The boom mic and noise-cancelling design separate your voice from surrounding chatter in a way that genuinely reduces the need to ask colleagues to repeat themselves during calls.

A small number of users report that hard plosive consonants can sound slightly harsh on certain softphone configurations. Adjusting the boom arm slightly off-axis from your mouth usually helps, but it takes a bit of initial experimentation to get the positioning right.

Call Audio Clarity

86%

The neodymium drivers produce clear, natural voice reproduction that makes extended call sessions noticeably less fatiguing than average headsets. Remote workers in particular praise how natural voices sound on the receiving end, which matters during long client or team calls.

This headset is tuned for voice and UC performance, not broad audio fidelity, so anyone hoping to use it for music or general media playback will find the sound range noticeably limited. The 6,800 Hz frequency ceiling makes itself felt the moment you play anything beyond speech.

Build Quality

91%

The stainless steel hinges, brushed aluminum accents, and Vectran-reinforced cable are not just marketing copy — users who have owned the SC 660 USB ML for two or more years consistently report that the structural components show minimal wear. For a shared-desk tool that gets handled multiple times daily, that longevity is meaningful.

The plastic housing creates a slight visual and tactile contrast against the premium metal components, and a handful of long-term users have noted minor creaking in the headband after extended daily use. It does not affect functionality, but it is noticeable over time.

Comfort & Wearability

67%

33%

For shorter call sessions — say, two to three hours — the on-ear fit feels secure and reasonably comfortable, and the leatherette pads are soft enough for initial wear. Users with smaller or average head sizes tend to report a more balanced fit than those with larger frames.

The on-ear design is where this headset earns its most consistent criticism. After four or five hours of continuous wear, the pressure on the ear cartilage becomes noticeable and, for some users, genuinely uncomfortable — a pain point that over-ear alternatives largely avoid. This is the single biggest concern for full-shift workers.

Value for Money

72%

28%

For IT teams buying in bulk or professionals who spend most of their working hours on calls, the combination of UC certification, a two-year warranty covering accessories, and durable construction makes the price easier to absorb over a multi-year ownership horizon. Procurement buyers in particular tend to rate value favorably.

Individual buyers who are occasional callers or who are used to paying far less for a functional headset will find the price a hard sell, especially when cheaper alternatives handle basic call audio adequately. The premium only makes sense if daily, high-volume use is part of the picture.

Noise Cancellation

87%

Users in open-plan offices and contact centers consistently highlight the noise cancellation as one of the first things they notice after switching from a lower-end headset. Keyboard clatter, air conditioning hum, and background conversations are effectively filtered, which reduces listener fatigue on both ends of a call.

In particularly extreme noise environments — think loud contact centers or co-working spaces with constant ambient sound — the cancellation can occasionally feel slightly overwhelmed, with residual background noise leaking through under heavy conditions. It is not a dealbreaker, but worth noting for the noisiest settings.

Cable & Connectivity

73%

27%

The Vectran-reinforced retractable cable handles the daily stress of plugging and unplugging with more resilience than standard headset cables, and the USB 2.0 connection works without driver installation on most modern Windows systems. The Easy Disconnect mechanism adds a practical quick-release point that regular desk-sharers genuinely appreciate.

USB-only connectivity is a real limitation for anyone who needs cross-device flexibility — there is no 3.5mm option, no Bluetooth, and no straightforward path to using this headset with a smartphone or tablet. Users who work across multiple device types will find this a genuine constraint.

In-Line Controls

83%

The ability to mute, adjust volume, answer, and end calls directly from the cable unit is something users notice most when they switch away from it — having to navigate software controls mid-conversation feels clunky by comparison. The control unit is intuitively laid out and responds reliably.

A small number of users report that the control unit can feel slightly bulky when the cable is routed across a cluttered desk, and the redial button occasionally gets triggered accidentally when the cable is repositioned. Neither issue is common, but they do appear in user feedback.

Setup & Compatibility

78%

22%

Plug in and you are on a call within seconds — no driver installation, no software required for basic functionality on Windows. IT administrators particularly appreciate this when rolling out headsets across a fleet, as there is no per-machine configuration overhead for standard UC deployments.

Full UC certification is built around Windows and Skype for Business, which means Mac users or those on Linux may encounter inconsistent behavior with some call control buttons. The optional EPOS Connect software adds configuration depth but is not always intuitive for non-technical users to navigate.

Portability

84%

The included hard carry case is a thoughtful addition that makes this headset genuinely travel-friendly — the structured case provides real protection rather than just a soft pouch, which matters when it is being moved between offices or packed into a bag regularly.

At just under 8 oz with the cable, this dual-ear UC headset is not especially light for a daily-carry item, and the double-sided design means it is bulkier to pack than a foldable single-ear alternative. The carry case adds further size to any bag.

Long-Term Durability

89%

Longer-term owners — those past the one-year mark — consistently confirm that the stainless hinges and reinforced cable hold up to the wear of daily professional use without the degradation that often hits plastic-heavy competitors. The two-year accessory warranty backs up the build quality with real coverage.

Ear pad wear is the most commonly reported long-term issue: the leatherette tends to crack or peel after twelve to eighteen months of heavy daily use, particularly in warmer environments. Replacement pads are available, but it is an ongoing maintenance cost users should factor in.

UC Platform Integration

92%

For organizations standardized on Skype for Business or Microsoft Teams, this business headset behaves exactly as expected — call controls work natively, audio routing is clean, and IT does not need to troubleshoot audio configuration. This level of out-of-the-box UC integration is not something every headset can credibly claim.

The UC certification is specifically validated for Windows-based deployments, so organizations running non-Microsoft communication platforms or mixed-OS environments may find the integration advantages less applicable. Google Meet or Zoom users, for example, get functional audio but not the same level of optimized call control.

Suitable for:

The EPOS Sennheiser SC 660 USB ML Headset is purpose-built for professionals who live on calls and cannot afford audio quality to be a variable. Contact center agents and customer support staff will get the most out of it — the double-sided design shuts out ambient noise on both ends, and the ultra noise-cancelling mic means callers hear your voice cleanly even in a busy open-plan office. Remote and hybrid workers who toggle between video meetings throughout the day will appreciate the plug-and-play USB setup and the in-line controls that let them manage calls without switching context to their screen. IT and procurement teams sourcing headsets for shared workstations will find the stainless steel construction, Vectran-reinforced cable, and two-year warranty — covering accessories, not just the headset body — compelling reasons to standardize on this model at scale. Anyone who carries a headset between offices regularly will also value the included hard protective case, which is not an afterthought.

Not suitable for:

If your call schedule is light or occasional, the investment required for the SC 660 USB ML is genuinely hard to justify — there are capable USB headsets at a fraction of the price that will handle a few calls a day without complaint. The on-ear form factor is also worth thinking carefully about before buying: unlike over-ear designs that distribute pressure across a larger area, this sits directly on the ear, and for users logging five or more hours of wear daily, fatigue is a recurring complaint that no amount of build quality resolves. The USB-only connection is another real limitation — if you need to use a headset with a mobile device, a tablet, or an older system without available USB ports, this dual-ear UC headset simply will not work without adapters. It is also tuned specifically for voice and UC performance, so buyers hoping to use it as a general-purpose audio headset for music or media playback will find it competent but unremarkable in that context. Buyers outside a Windows or Skype for Business ecosystem may also not get full use of its UC certification advantages.

Specifications

Form Factor: Double-sided, on-ear design with a headband that positions a speaker cup over each ear for full ambient sound isolation during calls.
Connectivity: USB 2.0 connection provides plug-and-play compatibility with Windows-based PCs and laptops without requiring additional drivers in most environments.
Audio Driver: Dynamic neodymium speaker drivers power each ear cup, tuned specifically for voice clarity and natural-sounding speech reproduction on calls.
Frequency Response: The headset covers a frequency range up to 6,800 Hz, which is optimized for voice communication rather than broad-spectrum music playback.
Impedance: Speaker impedance is rated at 200 Ohm, a specification consistent with professional-grade unified communications headsets in this category.
Weight: The headset weighs 7.94 oz, which is moderate for a double-sided on-ear design and worth considering for users who wear it across long shifts.
Cable: The retractable cable is reinforced with Vectran fiber, a material chosen for its resistance to the repeated bending and pulling that occurs in shared-desk environments.
Microphone: An ultra noise-cancelling boom microphone filters out ambient background sounds to isolate the speaker's voice during calls in open-plan or noisy settings.
Inline Controls: The in-line call control unit supports call answer and end, volume adjustment up and down, microphone mute, and last-number redial directly from the cable.
Quick Release: The Easy Disconnect mechanism allows the headset cable to detach rapidly from the desk connection point, designed specifically for shift-change and hot-desk workflows.
Carry Case: A hard protective carry case is included in the box, providing structured protection for transport between offices or during travel.
Warranty: EPOS provides a two-year manufacturer warranty that covers both the headset and included accessories, which is broader coverage than most competitors offer at this tier.
Materials: The headset combines a plastic housing with stainless steel hinges and brushed aluminum accent components, balancing light weight with structural durability at contact points.
Ear Cushions: Leatherette ear pads are fitted to each ear cup and are included as replaceable accessories within the standard package.
Platform Support: The headset is certified for Skype for Business and is compatible with major unified communications platforms running on Windows-based systems.

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FAQ

It is optimized and certified for Skype for Business, but it works reliably with Microsoft Teams as well since both platforms run over standard USB audio on Windows. You may not get every dedicated softkey function, but core call controls through the in-line unit work fine for most Teams users.

Yes, it will function as a standard USB audio device on macOS without needing extra drivers. That said, the full UC certification and any platform-specific call control features are validated against Windows and Skype for Business, so Mac users may find some in-line button functions behave differently depending on the softphone app.

That depends a lot on individual sensitivity to on-ear pressure. The on-ear design places the ear cups directly on the ear rather than around it, and after several hours some users report noticeable discomfort. If you regularly work long call-heavy shifts, it is worth trying it on for an extended period before committing, or considering an over-ear alternative if pressure is a concern for you.

The Easy Disconnect is a quick-release connector that sits between the headset and the cable running to your computer. Instead of unplugging from the PC end each time you step away, you separate the headset cleanly at a midpoint. It is genuinely useful in contact center environments where multiple people share the same workstation across shifts, or wherever you need to grab and go frequently.

No, this headset connects via USB 2.0 only, so it is not compatible with smartphones, tablets, or any device that lacks a standard USB port. If you need a headset that works across both your PC and mobile devices, you would need to look at models with a 3.5mm jack or Bluetooth connectivity.

Better than most headsets in this category. The boom mic uses an ultra noise-cancelling design that does a solid job of suppressing keyboard noise, background chatter, and HVAC hum. People on the other end of calls consistently report hearing you clearly even in open-plan environments. It is not perfect in extreme conditions, but for typical office or home-office backgrounds it performs reliably.

Both, in a sense. EPOS acquired Sennheiser's enterprise communications division and now manufactures and sells this product line under the EPOS name. The Sennheiser branding still appears on some older stock and documentation because of the transition. The product, engineering, and quality standard are the same — you are not getting a knockoff or a rebadge from a different manufacturer.

The material choices — stainless steel hinges, Vectran-reinforced cable, and brushed aluminum parts — are specifically selected to survive the wear patterns of daily professional use. Real-world feedback from longer-term users generally confirms that the structural components hold up well. The leatherette ear pads are the most likely part to show wear over time, but they are replaceable.

For basic call and audio functionality, no — it is plug-and-play on Windows. EPOS does offer optional software called EPOS Connect that can unlock firmware updates and additional configuration options, but installing it is not required to get the headset working out of the box.

The warranty is notably broader than average because it explicitly covers accessories, not just the main headset unit. For individual buyers that means peace of mind on the full kit. For IT and procurement teams buying in volume, it is a meaningful factor — having manufacturer-backed coverage on the entire unit including the cable and control module reduces the cost and friction of managing replacements across a fleet.