Poly Plantronics Blackwire 3320 Stereo USB Headset
The Blackwire 3320 blocks out the open office
In an open-plan office, a headset that leaves one ear open leaves the whole room in your ear too — the conversation two desks over, the printer, the person on speakerphone. The Poly Blackwire 3320 takes the other approach. It's the stereo headset in Poly's 3300 series, covering both ears so the room fades and the call is what's left.
That makes the 3320 the focus-and-concentration member of the family, where the mono 3310 keeps one ear on the room. It plugs into any Windows or Mac computer over USB — A or C — and, because it's true stereo, it doubles as a decent set of headphones for music or video between meetings.
Both ears, and what that actually does
Covering both ears does two things a mono headset can't: it physically blocks a good deal of room noise, and it pulls your attention onto the call. What it isn't is active noise cancellation. There's no electronics erasing the room — the quiet comes from the cushions sitting over both ears, which is real but modest. If you're picturing ANC headphones silencing a plane, that's a different technology.
It's also your headphones for the in-between
Because the Blackwire 3320 is true stereo with a multimedia audio mode, it plays music and video properly — something a single-ear headset simply can't do. Dynamic EQ shifts the sound automatically: tuned for voice on a call, fuller for media when you're not on one.
One headset for the call and the playlist
A mono call headset is fine for talking and not much else. The stereo Blackwire 3320 covers both — take your meetings on it, then leave it on for music or a video between them without reaching for earbuds. It's not audiophile gear, but for a work headset it holds its own on media, which quietly makes it the one that stays on your head all day.Build the exact Blackwire 3320 you need
Two versions, and the only choice is which USB plug fits your computer.
- USB-A (76J16AA). The standard USB-A plug for most desktops and older laptops. Works with every major softphone. The everyday office pick.
- USB-C (76J18AA). The USB-C plug for newer laptops, MacBooks, and USB-C devices. Same audio and compatibility. Pick this if your computer uses USB-C.
Blackwire 3320 or the mono 3310?
Both are the same comfortable 3300-series USB headset — the choice is one ear or two. The stereo 3320 blocks the room and handles media; the mono 3310 leaves an ear open so you stay aware of colleagues, and costs a little less.
Both ears covered. Blocks more room noise, sharpens focus, plays media properly. For open offices and concentration-heavy work.
One ear open. Keeps you aware of colleagues and the room. For collaborative floors and anyone who needs to hear both worlds.
The Blackwire 3320 is the headset for work that needs concentration — both ears on the call, the open office turned down, and real stereo for the music that gets you through the afternoon. Pick your USB plug, and it's plug-and-play on any computer, backed by HeadsetPlus's lifetime support.
- Poly Blackwire 3320 stereo USB headset with attached cable and inline call controls
- Soft foam ear cushions (fitted, both ears)
- Quick start guide
The inline controls handle answer/end, volume, and mute. This is the USB-only stereo model — for a stereo headset that also connects to phones over 3.5mm, see the Blackwire 3325.
| Type | Stereo (both-ear), over-the-head, on-ear |
|---|---|
| Series | Blackwire 3300 Series |
| Connection | USB-A or USB-C, attached cable; plug-and-play on Windows and Mac — no amplifier or dongle |
| Controls | Inline answer/end, volume, mute |
| Microphone | Flexible noise-canceling boom; rotates 180° for a custom fit |
| Audio | PC wideband voice plus hi-fi stereo for multimedia; Dynamic EQ auto-switches between voice and media |
| Noise handling | Passive isolation from covering both ears (not active noise cancellation); noise-canceling microphone for outgoing voice |
| Hearing protection | SoundGuard acoustic limiting above 118 dBA |
| Hearing aid compatibility | Telecoil Hearing Aid Compatible (HAC) |
| Comfort | Padded headband; soft foam ear cushions on both ears |
| Weight | Approx. 96 g (headset); around 130 g including inline control |
| Software | Poly Lens / Plantronics Hub (Windows and Mac) |
| Certification | UC — works with all major softphones (Microsoft Teams-certified versions available separately) |
| Part numbers | USB-A: 76J16AA (old 213934-101); USB-C: 76J18AA (old 213935-101) |
| Warranty | 2-year manufacturer warranty, plus HeadsetPlus lifetime technical support |
Software. The Blackwire 3320 works with every major softphone and UC platform — Microsoft Teams, Zoom, Webex, Avaya, and Cisco among them — on both Windows and Mac. Poly Lens (Plantronics Hub) manages settings and firmware. Because it's true stereo with a multimedia EQ mode, it also handles music and video well between calls.
Hardware. The headset connects over USB-A or USB-C, depending on the version, and is plug-and-play — no amplifier, dongle, or extra cable. It has no 3.5mm jack, so it doesn't connect to a phone that way; for a stereo headset with 3.5mm mobile connectivity, the Blackwire 3325 is the option.
Platforms. The Blackwire 3320 suits open-plan offices and concentration-heavy roles where blocking the room matters, large-office VoIP deployments, and anyone who wants one headset for both calls and media.
FAQ
Frequently Asked Questions
The Blackwire 3320 is stereo — it covers both ears to block more room noise, sharpen focus, and play media properly. The 3310 is mono, leaving one ear open so you stay aware of colleagues. Both are the same comfortable 3300-series USB headset; the choice is whether you want to block the room (3320) or stay aware of it (3310).
Not active noise cancellation. The Blackwire 3320's stereo design gives passive isolation — both ear cushions block some ambient sound — and its microphone is noise-canceling for your outgoing voice. But there's no ANC electronically erasing room noise, so it won't silence a loud environment the way ANC headphones do.
Match it to your computer's port. Choose the USB-A version for most desktops and older laptops, and the USB-C version for newer laptops, MacBooks, and USB-C devices. Both deliver identical audio and softphone compatibility.
Yes. Because the Blackwire 3320 is true stereo with a multimedia EQ mode, it plays music and video properly — unlike a mono headset. It's a work headset rather than audiophile gear, but it holds its own for media between calls, which is a real advantage of the stereo model.
The Blackwire 3320 is USB-only, so it connects to computers, not phones — there's no 3.5mm jack. If you want a stereo headset that also plugs into a mobile phone or tablet over 3.5mm, the Blackwire 3325 is the version to choose.