In depth comparison and review of EPOS I SENNHEISER IMPACT MB 660 UC and Poly Voyager Focus UC B825S-M. 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 Focus UC B825S-M |
|---|
| Product Type | Headset - Bluetooth - wireless - NFC - USB, 3.5 mm jack | Headset - Bluetooth - wireless | |
|---|---|---|---|
| Weight | 227 g | 155 g | Poly Voyager Focus UC B825S-M are lighter than EPOS I SENNHEISER IMPACT MB 660 UC headphones. |
| Recommended Use | Portable electronics, computer | Portable electronics, computer | |
| Bluetooth Range (Operating Distance) | 25 m | 45 m | Poly Voyager Focus UC B825S-M have a greater operating distance than EPOS I SENNHEISER IMPACT MB 660 UC. |
| SOUND QUALITY | EPOS I SENNHEISER IMPACT MB 660 UC | Poly Voyager Focus UC B825S-M |
|---|
| 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 Focus UC B825S-M. |
| Bluetooth Profiles | Hands-Free Profile (HFP), Headset Profile (HSP), Advanced Audio Distribution Profile (A2DP), Audio/Video Remote Control Profile (AVRCP), Device ID Profile (DIP) | Advanced Audio Distribution Profile (A2DP) | |
| Bluetooth Audio Codec | SBC, aptX | - | |
| Active Noise Cancelling | Yes | Yes | Both headphones are equipped with active noice cancellation. |
| Active Noise Cancelling Technology | NoiseGard active noise compensation | - | |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 17 - 23000 Hz | - | |
| Total Harmonic Distortion (THD) | <0.5% | - | |
| Sensitivity | 118 dB | - | |
| Impedance | 46 Ohm | - |
| MICROPHONE | EPOS I SENNHEISER IMPACT MB 660 UC | Poly Voyager Focus UC B825S-M |
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| Form Factor | Built-in | - | |
|---|---|---|---|
| Type | - | Boom | |
| Microphone Operation Mode | - | Mono | |
| Frequency Response | 150 - 6800 Hz | - | |
| Microphones Included | 3 | - |
| REMOTE CONTROL | EPOS I SENNHEISER IMPACT MB 660 UC | Poly Voyager Focus UC B825S-M |
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| Controls | - | Volume |
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| CABLE | EPOS I SENNHEISER IMPACT MB 660 UC | Poly Voyager Focus UC B825S-M |
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| Cable Type | Audio cable Micro-USB cable |
Charging cable |
|---|
| FEATURES | EPOS I SENNHEISER IMPACT MB 660 UC | Poly Voyager Focus UC B825S-M |
|---|
| Additional Functions | - | DSP |
|---|
| BATTERY AND CHARGING | EPOS I SENNHEISER IMPACT MB 660 UC | Poly Voyager Focus UC B825S-M |
|---|
| Battery Type | Headset battery rechargeable - lithium polymer | Headset battery rechargeable | |
|---|---|---|---|
| Battery Capacity | 700 mAh | - | |
| Battery Life | 30 hours | 15 hour(s) | EPOS I SENNHEISER IMPACT MB 660 UC lasts longer on a single charge than the Poly Voyager Focus UC B825S-M. |
| Standby Time | 360 hours | - | |
| Charging Time | 3 hours | - |
| WIRELESS LINK | EPOS I SENNHEISER IMPACT MB 660 UC | Poly Voyager Focus UC B825S-M |
|---|
| Transmission Range | 25 m | - |
|---|
| CONNECTIONS | EPOS I SENNHEISER IMPACT MB 660 UC | Poly Voyager Focus UC B825S-M |
|---|
| Connector Type | - | Bluetooth |
|---|
| OTHERS | EPOS I SENNHEISER IMPACT MB 660 UC | Poly Voyager Focus UC B825S-M |
|---|
| Included Accessories | Carrying case, Bluetooth adapter, airplane adapter | Carrying case, Bluetooth USB adapter, charging stand | |
|---|---|---|---|
| Service & Support | Limited warranty - 2 years | Limited warranty - 2 years |
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