Detailed comparison and review of EPOS I SENNHEISER IMPACT MB 660 UC MS and Sennheiser HD 4.50 BTNC Wireless. With our comprehensive overview, you can simply compare design, sound quality, but also other key features of both headphones and easily decide which ones are the right choice for you. Our goal is to help you identify the main differences between products and find the headphones that best fit your needs and expectations.
| DESIGN AND DIMENSIONS | EPOS I SENNHEISER IMPACT MB 660 UC MS | Sennheiser HD 4.50 BTNC Wireless |
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| Product Type | Headset - Bluetooth - wireless - NFC | Headphones - Bluetooth - wireless - NFC | |
|---|---|---|---|
| Weight | 227 g | 238 g | EPOS I SENNHEISER IMPACT MB 660 UC MS are lighter than EPOS I SENNHEISER IMPACT MB 660 UC MS headphones. |
| Recommended Use | Portable electronics, computer | Portable electronics | |
| Bluetooth Range (Operating Distance) | 25 m | - |
| SOUND QUALITY | EPOS I SENNHEISER IMPACT MB 660 UC MS | Sennheiser HD 4.50 BTNC Wireless |
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| Headphones Form Factor | Full size | Full size | |
|---|---|---|---|
| Headphones Technology | Dynamic | Dynamic | |
| Ear Cups Type | Closed | Closed | |
| Foldable | Yes | Yes | Both headphones can be folded. |
| Connectivity Technology | Wireless | Wireless | |
| Wireless Technology | Bluetooth | Bluetooth | |
| Bluetooth Version | Bluetooth 4.2 | Bluetooth 4.0 | EPOS I SENNHEISER IMPACT MB 660 UC MS have a more advanced version of Bluetooth than Sennheiser HD 4.50 BTNC Wireless. |
| 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) | |
| Active Noise Cancelling | Yes | Yes | Both headphones are equipped with active noice cancellation. |
| Active Noise Cancelling Technology | Adaptive Noise Control | NoiseGard active noise compensation | |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 17 - 23000 Hz | 18 - 22000 Hz | EPOS I SENNHEISER IMPACT MB 660 UC MS offer a larger frequency range than Sennheiser HD 4.50 BTNC Wireless. |
| Total Harmonic Distortion (THD) | 0.5% | <0.5% | Both headphones have the same total harmonic distortion. |
| Sensitivity | 118 dB | 113 dB | EPOS I SENNHEISER IMPACT MB 660 UC MS have higher sensitivity than Sennheiser HD 4.50 BTNC Wireless. |
| Impedance | 46 Ohm | 18 Ohm | |
| Magnet Material | - | Neodymium | |
| Features | - | Bluetooth aptX technology |
| MICROPHONE | EPOS I SENNHEISER IMPACT MB 660 UC MS | Sennheiser HD 4.50 BTNC Wireless |
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| Form Factor | - | Built-in | |
|---|---|---|---|
| Microphone Operation Mode | - | Omni-directional | |
| Frequency Response | 150 - 6800 Hz | 100 - 10000 Hz | Sennheiser HD 4.50 BTNC Wireless offer a larger microphone frequency range than EPOS I SENNHEISER IMPACT MB 660 UC MS. |
| Microphones Included | - | 2 |
| REMOTE CONTROL | EPOS I SENNHEISER IMPACT MB 660 UC MS | Sennheiser HD 4.50 BTNC Wireless |
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| Controls | - | Power on/off, volume control, answer/end, hold, play/pause, next/previous track, reject call, redial |
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| CABLE | EPOS I SENNHEISER IMPACT MB 660 UC MS | Sennheiser HD 4.50 BTNC Wireless |
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| Cable Type | Audio cable Micro-USB cable |
Headphones cable - detachable - L shaped - 1.4 m Micro-USB charge cable - detachable |
|
|---|---|---|---|
| Cable Length | - | 1.4 m | |
| Detachable Cable | - | Yes | |
| Plated Connector | - | Gold |
| BATTERY AND CHARGING | EPOS I SENNHEISER IMPACT MB 660 UC MS | Sennheiser HD 4.50 BTNC Wireless |
|---|
| Battery Type | Headset battery rechargeable | Headphone battery rechargeable - lithium polymer | |
|---|---|---|---|
| Battery Capacity | - | 600 mAh | |
| Battery Life | 30 hours | 25 hour(s) | EPOS I SENNHEISER IMPACT MB 660 UC MS lasts longer on a single charge than the Sennheiser HD 4.50 BTNC Wireless. |
| Standby Time | 360 hours | - | |
| Charging Time | 3 hours | 2 hour(s) | Sennheiser HD 4.50 BTNC Wireless recharge faster than EPOS I SENNHEISER IMPACT MB 660 UC MS. |
| WIRELESS LINK | EPOS I SENNHEISER IMPACT MB 660 UC MS | Sennheiser HD 4.50 BTNC Wireless |
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| Transmission Range | 25 m | - |
|---|
| CONNECTIONS | EPOS I SENNHEISER IMPACT MB 660 UC MS | Sennheiser HD 4.50 BTNC Wireless |
|---|
| Connector Type | - | Headphones (mini-phone stereo 3.5 mm) |
|---|
| OTHERS | EPOS I SENNHEISER IMPACT MB 660 UC MS | Sennheiser HD 4.50 BTNC Wireless |
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| Included Accessories | Carrying case, Bluetooth adapter, airplane adapter | Carrying case, micro-USB charging cable | |
|---|---|---|---|
| Service & Support | Limited warranty - 2 years | - |
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