Jabra Speak2 75 vs Poly Sync 40 Comparison

Jabra Speak2 75

Four beamforming mics with a rated 2.5 m pickup cover a room of up to about 4.5 x 4.5 m. That's the same room rating as the cheaper Speak2 55, so the 75's advantage is slightly longer reach and super-wideband audio that keeps consonants crisp when the meeting app supports it.

Poly Sync 40

Three steerable mics reach 2.5 m, and Poly sizes the Sync 40 for rooms around 5 x 5 m. That's a larger area than Jabra quotes for the Speak2 75, even with fewer mics. However, when I ran it myself with five people around a huddle table, everyone stayed intelligible out to the far edge of the table.

Jabra Speak2 75

The 65 mm full-range driver is the largest in the Speak2 family, where the 55 and 40 use 50 mm drivers, and Jabra rates peak output at 88 dB at half a metre. Full duplex lets both ends talk at once without the speaker ducking the mics, so a call feels like a conversation rather than a walkie-talkie exchange.

Poly Sync 40

A 50 mm driver with an 89 dB nominal peak is one of the louder battery units here. The response goes down to 75 Hz, which gives voices more body than small pucks. For a six-person huddle, a moderate volume was enough in a typical room. That leaves real headroom, unlike the Speak2 75, which tops out sooner.

Jabra Speak2 75

You get three signal paths. The built-in USB-C cable, with an attached USB-A adapter, goes to the laptop. Bluetooth 5.2 handles the phone, and on packs that include it, the Link 390 dongle gives a PC a stable wireless link. Two Bluetooth connections stay paired at once. That's the real gap with the Speak2 55, whose Bluetooth is meant for phones and tablets and which ships without a dongle.

Poly Sync 40

You get USB-A and USB-C cables plus Bluetooth 5.1. The Sync 40+ includes the BT600 dongle. Two units can link wirelessly with a dedicated button, which is one of the simplest ways to cover a longer table. Linking two Sync 40s took a moment. If the room has a wall-mounted display, put the second unit closer to the screen end so remote voices come from the right direction.

Jabra Speak2 75

Jabra rates the 4,700 mAh battery for up to 32 hours of talk time, with about 2.5 hours for a full charge. On paper, that covers a working week of calls without reaching for the cable. However, when I ran it myself, it lasted about 20 hours of continuous Google Meet meetings on a single full charge, with only a one-minute break each hour.

Poly Sync 40

Poly rates the 5,000 mAh battery for 30 hours of talk time, with a 5-hour charge. That's close to the Speak2 75's 32 hours, and far ahead of the Anker S500's 13. In my own continuous Teams calls, it ran for a long stretch of calls before needing the cable.

Jabra Speak2 75

It comes in two versions. The Microsoft Teams model adds a Teams button that lights up for a meeting you can join or a missed call. The UC model works with Zoom, Google Meet, Webex and other apps over the same USB audio path. Certifications cover Teams, Google Meet and Amazon Chime, plus Cisco, Avaya, Unify and Alcatel-Lucent systems.

Poly Sync 40

Poly offers a Teams-certified version, and every Sync 40 is Zoom certified. For a Teams versus Teams Rooms decision, the Sync 40 is a BYOD device: people plug in their own laptop rather than joining from a room console.