In depth comparison and review of Poly Voyager 4220 UC and Sennheiser HMDC 27. 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 | Poly Voyager 4220 UC | Sennheiser HMDC 27 |
|---|
| Product Type | Headset - Bluetooth - wireless | Headset - wired | |
|---|---|---|---|
| Series | UC Series | - | |
| Weight | 150 g | 240 g | Poly Voyager 4220 UC are lighter than Poly Voyager 4220 UC headphones. |
| Recommended Use | - | Professional audio | |
| Bluetooth Range (Operating Distance) | 30 m | - |
| SOUND QUALITY | Poly Voyager 4220 UC | Sennheiser HMDC 27 |
|---|
| Headphones Form Factor | On-ear | Full size | |
|---|---|---|---|
| Headphones Technology | - | Dynamic | |
| Ear Cups Type | - | Closed | |
| Connectivity Technology | Wireless | Wired | |
| Wireless Technology | Bluetooth | - | |
| Bluetooth Version | Bluetooth 5.0 | - | |
| Bluetooth Profiles | Hands-Free Profile (HFP), Headset Profile (HSP), Advanced Audio Distribution Profile (A2DP), Audio/Video Remote Control Profile (AVRCP) | - | |
| Bluetooth Audio Codec | SBC, mSBC | - | |
| Active Noise Cancelling | - | Yes | Sennheiser HMDC 27 are equipped with active noice cancellation. |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 20 - 20000 Hz | 8 - 18000 Hz | Poly Voyager 4220 UC offer a larger frequency range than Sennheiser HMDC 27. |
| Total Harmonic Distortion (THD) | - | <0.1% | |
| Impedance | 32 Ohm | - | |
| Max Sound Pressure | - | 128 dB | |
| Diaphragm | 32 mm | - | |
| Features | SoundGuard DIGITAL Technology | - |
| MICROPHONE | Poly Voyager 4220 UC | Sennheiser HMDC 27 |
|---|
| Form Factor | Headset microphone | - | |
|---|---|---|---|
| Type | Boom | Boom | |
| Microphone Technology | - | Dynamic | |
| Microphone Operation Mode | Uni-directional | Hypercardioid | |
| Frequency Response | - | 40 - 18000 Hz | |
| Microphones Included | 2 | - |
| REMOTE CONTROL | Poly Voyager 4220 UC | Sennheiser HMDC 27 |
|---|
| Controls | Mute, volume, answer/end, play/pause, next/previous track, reject call, redial, voice assistant | - |
|---|
| FEATURES | Poly Voyager 4220 UC | Sennheiser HMDC 27 |
|---|
| Features | Voice alerts | EPOS ActiveGard | |
|---|---|---|---|
| Intelligent Assistant | Alexa | - |
| BATTERY AND CHARGING | Poly Voyager 4220 UC | Sennheiser HMDC 27 |
|---|
| Battery Type | Headset battery rechargeable - lithium polymer | - | |
|---|---|---|---|
| Battery Capacity | 360 mAh | - | |
| Battery Life | 15 hour(s) | - | |
| Battery Life Details | Continuous playback: up to 15 hours Continuous talk: up to 12 hours |
- | |
| Standby Time | 312 hours | - | |
| Charging Time | 1.5 hour(s) | - |
| CONNECTIONS | Poly Voyager 4220 UC | Sennheiser HMDC 27 |
|---|
| Connector Type | Wireless adapter (4 PIN USB Type A) | - |
|---|
| OTHERS | Poly Voyager 4220 UC | Sennheiser HMDC 27 |
|---|
| Included Accessories | Bluetooth USB adapter, charging stand | Wind screen, cable clip, headband padding |
|---|
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