In depth comparison and review of Sennheiser HMDC 27 and Poly Voyager Surround 85. Compare design, audio features, functions and other important specifications to easily choose the right headphones for you. Our goal is to help you uncover differences between the products and find the headphones that will best fit your needs.
| DESIGN AND DIMENSIONS | Sennheiser HMDC 27 | Poly Voyager Surround 85 |
|---|
| Product Type | Headset - wired | Headset - Bluetooth - wireless - USB-C via Bluetooth adapter | |
|---|---|---|---|
| Series | - | Voyager Surround 80 series | |
| Height | - | 18.1 cm | |
| Width | - | 19.1 cm | |
| Depth | - | 7.7 cm | |
| Weight | 240 g | 275 g | Sennheiser HMDC 27 are lighter than Sennheiser HMDC 27 headphones. |
| Colour | - | Black | |
| Earpad Material | - | Artificial leather | |
| Recommended Use | Professional audio | Portable electronics, computer | |
| Bluetooth Range (Operating Distance) | - | 30 m |
| SOUND QUALITY | Sennheiser HMDC 27 | Poly Voyager Surround 85 |
|---|
| Headphones Form Factor | Full size | Over ear | |
|---|---|---|---|
| Headphones Technology | Dynamic | - | |
| Ear Cups Type | Closed | - | |
| Connectivity Technology | Wired | Wireless | |
| Wireless Technology | - | Bluetooth | |
| Bluetooth Version | - | Bluetooth 5.3 | |
| Bluetooth Profiles | - | Hands-Free Profile (HFP), Headset Profile (HSP), Advanced Audio Distribution Profile (A2DP), Audio/Video Remote Control Profile (AVRCP), Audio/Video Distribution Transport Protocol (AVDTP) | |
| Active Noise Cancelling | Yes | Yes | Both headphones are equipped with active noice cancellation. |
| Active Noise Cancelling Technology | - | Adjustable noise cancellation | |
| Sound Output Mode | Stereo | - | |
| Frequency Response | 8 - 18000 Hz | - | |
| Total Harmonic Distortion (THD) | <0.1% | - | |
| Sensitivity | - | 132 dB | |
| Max Sound Pressure | 128 dB | - | |
| Diaphragm | - | 40 mm | |
| Simultaneously Connectable Devices Qty (Multipoint) | - | 2 | Poly Voyager Surround 85 have the ability to connect to multiple devices simultaneously. |
| Features | - | SoundGuard DIGITAL Technology, Smart Sensor Technology |
| MICROPHONE | Sennheiser HMDC 27 | Poly Voyager Surround 85 |
|---|
| Form Factor | - | Built-in | |
|---|---|---|---|
| Type | Boom | - | |
| Microphone Technology | Dynamic | - | |
| Microphone Operation Mode | Hypercardioid | - | |
| Frequency Response | 40 - 18000 Hz | 20 - 16000 Hz | Sennheiser HMDC 27 offer a larger microphone frequency range than Poly Voyager Surround 85. |
| Sensitivity | - | -37 dB | |
| Microphones Included | - | 10 |
| REMOTE CONTROL | Sennheiser HMDC 27 | Poly Voyager Surround 85 |
|---|
| Controls | - | Volume, power on/off, answer/end, play/pause |
|---|
| CABLE | Sennheiser HMDC 27 | Poly Voyager Surround 85 |
|---|
| Cable Type | - | USB-C to mini-phone 3.5 mm cable USB-C charge cable - detachable |
|---|
| FEATURES | Sennheiser HMDC 27 | Poly Voyager Surround 85 |
|---|
| Features | EPOS ActiveGard | - |
|---|
| BATTERY AND CHARGING | Sennheiser HMDC 27 | Poly Voyager Surround 85 |
|---|
| Battery Type | - | Headset battery rechargeable - Lithium Ion | |
|---|---|---|---|
| Battery Life | - | 24 hours | |
| Battery Life Details | - | Continuous playback: up to 24 hours Continuous talk: up to 21 hours |
|
| Charging Time | - | 1 hours |
| OTHERS | Sennheiser HMDC 27 | Poly Voyager Surround 85 |
|---|
| Included Accessories | Wind screen, cable clip, headband padding | Carrying case, USB charging cable, charging stand, USB-C to USB-A adapter, USB-C to audio cable, BT700 Bluetooth USB-C adapter | |
|---|---|---|---|
| Software Included | - | Poly Lens | |
| Compatibility | - | Mac, Windows | |
| Software Certification | - | Certified for Microsoft Teams, Certified for Microsoft Teams Open Office, UC certified | |
| Supported Host Device OS | - | macOS, Android, iOS, Windows |
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