Side by side comparison and review of EPOS I SENNHEISER IMPACT MB 660 UC MS and Poly Blackwire C725-UC. Compare design, sound quality and other key specifications and features to simplify the choice of your perfect headphones. Our goal is to make it easier for you to decide on the headphones that will best meet your expectations by revealing the main differences between the products.
| DESIGN AND DIMENSIONS | EPOS I SENNHEISER IMPACT MB 660 UC MS | Poly Blackwire C725-UC |
|---|
| Product Type | Headset - Bluetooth - wireless - NFC | Headset - wired - USB | |
|---|---|---|---|
| Series | - | 700 Series | |
| Weight | 227 g | - | |
| Recommended Use | Portable electronics, computer | Computer | |
| Bluetooth Range (Operating Distance) | 25 m | - |
| SOUND QUALITY | EPOS I SENNHEISER IMPACT MB 660 UC MS | Poly Blackwire C725-UC |
|---|
| Headphones Form Factor | Full size | On-ear | |
|---|---|---|---|
| Headphones Technology | Dynamic | - | |
| Ear Cups Type | Closed | - | |
| Foldable | Yes | - | EPOS I SENNHEISER IMPACT MB 660 UC MS can be folded. |
| Connectivity Technology | Wireless | Wired | |
| Wireless Technology | Bluetooth | - | |
| Bluetooth Version | Bluetooth 4.2 | - | |
| Bluetooth Profiles | Hands-Free Profile (HFP), Headset Profile (HSP), Advanced Audio Distribution Profile (A2DP), Audio/Video Remote Control Profile (AVRCP), Device ID Profile (DIP) | - | |
| Active Noise Cancelling | Yes | Yes | Both headphones are equipped with active noice cancellation. |
| Active Noise Cancelling Technology | Adaptive Noise Control | SoundGuard | |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 17 - 23000 Hz | 20 - 20000 Hz | EPOS I SENNHEISER IMPACT MB 660 UC MS offer a larger frequency range than Poly Blackwire C725-UC. |
| Total Harmonic Distortion (THD) | 0.5% | - | |
| Sensitivity | 118 dB | - | |
| Impedance | 46 Ohm | - | |
| In-Cord Volume Control | - | Yes |
| MICROPHONE | EPOS I SENNHEISER IMPACT MB 660 UC MS | Poly Blackwire C725-UC |
|---|
| Form Factor | - | Headset microphone | |
|---|---|---|---|
| Type | - | Boom | |
| Frequency Response | 150 - 6800 Hz | 100 - 8000 Hz | Poly Blackwire C725-UC offer a larger microphone frequency range than EPOS I SENNHEISER IMPACT MB 660 UC MS. |
| REMOTE CONTROL | EPOS I SENNHEISER IMPACT MB 660 UC MS | Poly Blackwire C725-UC |
|---|
| Controls | - | Mute, volume, answer/end |
|---|
| CABLE | EPOS I SENNHEISER IMPACT MB 660 UC MS | Poly Blackwire C725-UC |
|---|
| Cable Type | Audio cable Micro-USB cable |
USB cable - 2.04 m | |
|---|---|---|---|
| Cable Length | - | 2.04 m |
| BATTERY AND CHARGING | EPOS I SENNHEISER IMPACT MB 660 UC MS | Poly Blackwire C725-UC |
|---|
| Battery Type | Headset battery rechargeable | - | |
|---|---|---|---|
| Battery Life | 30 hours | - | |
| Standby Time | 360 hours | - | |
| Charging Time | 3 hours | - |
| WIRELESS LINK | EPOS I SENNHEISER IMPACT MB 660 UC MS | Poly Blackwire C725-UC |
|---|
| Transmission Range | 25 m | - |
|---|
| CONNECTIONS | EPOS I SENNHEISER IMPACT MB 660 UC MS | Poly Blackwire C725-UC |
|---|
| Connector Type | - | USB (4 PIN USB Type A) |
|---|
| OTHERS | EPOS I SENNHEISER IMPACT MB 660 UC MS | Poly Blackwire C725-UC |
|---|
| Included Accessories | Carrying case, Bluetooth adapter, airplane adapter | Carrying case | |
|---|---|---|---|
| Service & Support | Limited warranty - 2 years | Limited warranty - 2 years |
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