In depth comparison and review of EPOS I SENNHEISER IMPACT MB 660 UC and Poly Voyager 4220 Office (UC Series). 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 | EPOS I SENNHEISER IMPACT MB 660 UC | Poly Voyager 4220 Office (UC Series) |
|---|
| Product Type | Headset - Bluetooth - wireless - NFC - USB, 3.5 mm jack | Headset - Bluetooth - wireless - USB-C | |
|---|---|---|---|
| Series | - | UC Series | |
| Weight | 227 g | 150 g | Poly Voyager 4220 Office (UC Series) are lighter than EPOS I SENNHEISER IMPACT MB 660 UC headphones. |
| Recommended Use | Portable electronics, computer | - | |
| Bluetooth Range (Operating Distance) | 25 m | 30 m | Poly Voyager 4220 Office (UC Series) have a greater operating distance than EPOS I SENNHEISER IMPACT MB 660 UC. |
| SOUND QUALITY | EPOS I SENNHEISER IMPACT MB 660 UC | Poly Voyager 4220 Office (UC Series) |
|---|
| Headphones Form Factor | Full size | On-ear | |
|---|---|---|---|
| Headphones Technology | Dynamic | - | |
| Ear Cups Type | Closed | - | |
| Foldable | Yes | - | EPOS I SENNHEISER IMPACT MB 660 UC can be folded. |
| Connectivity Technology | Wireless | Wireless | |
| Wireless Technology | Bluetooth | Bluetooth | |
| Bluetooth Version | Bluetooth 4.2 | Bluetooth 4.1 | EPOS I SENNHEISER IMPACT MB 660 UC have a more advanced version of Bluetooth than Poly Voyager 4220 Office (UC Series). |
| Bluetooth Profiles | Hands-Free Profile (HFP), Headset Profile (HSP), Advanced Audio Distribution Profile (A2DP), Audio/Video Remote Control Profile (AVRCP), Device ID Profile (DIP) | Hands-Free Profile (HFP), Headset Profile (HSP), Advanced Audio Distribution Profile (A2DP), Audio/Video Remote Control Profile (AVRCP) | |
| Bluetooth Audio Codec | SBC, aptX | - | |
| Active Noise Cancelling | Yes | - | EPOS I SENNHEISER IMPACT MB 660 UC are equipped with active noice cancellation. |
| Active Noise Cancelling Technology | NoiseGard active noise compensation | - | |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 17 - 23000 Hz | 20 - 20000 Hz | EPOS I SENNHEISER IMPACT MB 660 UC offer a larger frequency range than Poly Voyager 4220 Office (UC Series). |
| Total Harmonic Distortion (THD) | <0.5% | - | |
| Sensitivity | 118 dB | 94 dB | EPOS I SENNHEISER IMPACT MB 660 UC have higher sensitivity than Poly Voyager 4220 Office (UC Series). |
| Impedance | 46 Ohm | 32 Ohm | |
| Diaphragm | - | 32 mm | |
| Features | - | SoundGuard Technology |
| MICROPHONE | EPOS I SENNHEISER IMPACT MB 660 UC | Poly Voyager 4220 Office (UC Series) |
|---|
| Form Factor | Built-in | - | |
|---|---|---|---|
| Type | - | Boom | |
| Microphone Operation Mode | - | Uni-directional | |
| Frequency Response | 150 - 6800 Hz | - | |
| Microphones Included | 3 | 2 | EPOS I SENNHEISER IMPACT MB 660 UC have a built-in microphone. |
| REMOTE CONTROL | EPOS I SENNHEISER IMPACT MB 660 UC | Poly Voyager 4220 Office (UC Series) |
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| Controls | - | Mute, volume, answer/end, play/pause, next/previous track |
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| CABLE | EPOS I SENNHEISER IMPACT MB 660 UC | Poly Voyager 4220 Office (UC Series) |
|---|
| Cable Type | Audio cable Micro-USB cable |
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| FEATURES | EPOS I SENNHEISER IMPACT MB 660 UC | Poly Voyager 4220 Office (UC Series) |
|---|
| Features | - | Voice alerts |
|---|
| BATTERY AND CHARGING | EPOS I SENNHEISER IMPACT MB 660 UC | Poly Voyager 4220 Office (UC Series) |
|---|
| Battery Type | Headset battery rechargeable - lithium polymer | Headset battery rechargeable - lithium polymer | |
|---|---|---|---|
| Battery Capacity | 700 mAh | 360 mAh | EPOS I SENNHEISER IMPACT MB 660 UC have a higher battery capacity than Poly Voyager 4220 Office (UC Series). |
| Battery Life | 30 hours | 12 hour(s) | EPOS I SENNHEISER IMPACT MB 660 UC lasts longer on a single charge than the Poly Voyager 4220 Office (UC Series). |
| Battery Life Details | - | Continuous playback: up to 15 hours Continuous talk: up to 12 hours |
|
| Standby Time | 360 hours | 312 hours | EPOS I SENNHEISER IMPACT MB 660 UC have longer standby time than Poly Voyager 4220 Office (UC Series). |
| Charging Time | 3 hours | 1.5 hour(s) | Poly Voyager 4220 Office (UC Series) recharge faster than EPOS I SENNHEISER IMPACT MB 660 UC. |
| WIRELESS LINK | EPOS I SENNHEISER IMPACT MB 660 UC | Poly Voyager 4220 Office (UC Series) |
|---|
| Transmission Range | 25 m | - |
|---|
| OTHERS | EPOS I SENNHEISER IMPACT MB 660 UC | Poly Voyager 4220 Office (UC Series) |
|---|
| Included Accessories | Carrying case, Bluetooth adapter, airplane adapter | Wireless headset system base, Bluetooth USB-C adapter | |
|---|---|---|---|
| Service & Support | Limited warranty - 2 years | - |
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