Poly DA75 USB to QD Adapter, USB-A/USB-C
Fast nationwide delivery in 2–4 working days.
Protected by a full 2-year warranty.
Description
QD (4-pin) to USB | USB-A and USB-C | No controls | 38 g
The Poly DA75 is a USB-to-QD audio processor. It connects a Poly or Plantronics Quick Disconnect (QD) headset to a computer for softphone and Teams/Zoom calls, and adjusts the audio to the headset model connected.
Key features
- Connects QD to PC: Use your QD headset with a computer over USB.
- USB-A and USB-C: Works with both port types (per supplier and manufacturer data).
- Streamlined: No buttons on the cord, so nothing gets pressed by accident.
Fits these headsets we sell
- Poly EncorePro 310 QD (77T43AA)
- Poly EncorePro 510 QD (783Q2AA)
- Poly EncorePro 720 QD (8R707AA)
- Other Poly / Plantronics 4-pin QD headsets
Specifications
| Specification | Detail |
|---|---|
| Manufacturer part number | 786C6AA |
| Headset connector | QD, 4-pin |
| Computer connector | USB-A and USB-C |
| Controls | None |
| Weight | 38 g |
| Colour | Black |
Versions and part numbers
| Part number | Version | Sold by us |
|---|---|---|
| 786C6AA | DA75 | Yes: this listing |
| 786C7AA | DA85 UC (inline controls) | Yes |
| 786C8AA | DA85-M (Microsoft Teams) | Not sold by us |
What's in the box
- 1 x Poly DA75 adapter
FAQ
Which headsets does it fit?
Poly and Plantronics headsets with a 4-pin QD connector, such as the EncorePro 310, 510 and 720 QD models. Headsets with a 6-pin digital QD need a 4-to-6-pin cable.
Does it have call controls?
No. Choose the DA85 if you want controls on the cord.
Part number: HP Poly 786C6AA
Key Specifications
What Makes It Stand Out
Poly DA75 USB to QD Adapter, USB-A/USB-C
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Why Quality Headsets Pay for Themselves
Cheap audio costs more than it saves. Dropped calls, background noise, and constant replacements drain focus and credibility.
A professional-grade headset delivers clear sound, lasting comfort, and reliability that keeps every conversation sharp, so you can work, lead, and sound your best.
Save Yourself The Headache
Nothing drains a workday faster than bad audio and constant tech issues. Cheap headsets crackle, disconnect, and distract costing time, focus, and credibility.
With a reliable headset that simply works, you stay sharp, sound professional, and keep every conversation running smoothly. Clear calls, no frustration, just effortless performance.