Detailed comparison and review of EPOS I SENNHEISER IMPACT MB 660 UC MS and Sennheiser HD 400S. 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 400S |
|---|
| Product Type | Headset - Bluetooth - wireless - NFC | Headphones - wired - 3.5 mm jack | |
|---|---|---|---|
| Weight | 227 g | 217 g | Sennheiser HD 400S are lighter than EPOS I SENNHEISER IMPACT MB 660 UC MS headphones. |
| Colour | - | Black | |
| 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 400S |
|---|
| 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 | 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 | - | EPOS I SENNHEISER IMPACT MB 660 UC MS are equipped with active noice cancellation. |
| Active Noise Cancelling Technology | Adaptive Noise Control | - | |
| Noise Isolating | - | Yes | Sennheiser HD 400S are equipped with a noise isolating function. |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 17 - 23000 Hz | 18 - 20000 Hz | EPOS I SENNHEISER IMPACT MB 660 UC MS offer a larger frequency range than Sennheiser HD 400S. |
| Total Harmonic Distortion (THD) | 0.5% | 0.5% | Both headphones have the same total harmonic distortion. |
| Sensitivity | 118 dB | - | |
| Impedance | 46 Ohm | 18 Ohm | |
| Max Sound Pressure | - | 120 dB |
| MICROPHONE | EPOS I SENNHEISER IMPACT MB 660 UC MS | Sennheiser HD 400S |
|---|
| Type | - | On-cable | |
|---|---|---|---|
| Frequency Response | 150 - 6800 Hz | 100 - 10000 Hz | Sennheiser HD 400S 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 | Sennheiser HD 400S |
|---|
| Controls | - | Answer/end, play/pause, next/previous track |
|---|
| CABLE | EPOS I SENNHEISER IMPACT MB 660 UC MS | Sennheiser HD 400S |
|---|
| Cable Type | Audio cable Micro-USB cable |
Headphones cable - detachable - L shaped / mini-phone stereo 3.5 mm - 1.4 m | |
|---|---|---|---|
| Cable Length | - | 1.4 m | |
| Detachable Cable | - | Yes |
| BATTERY AND CHARGING | EPOS I SENNHEISER IMPACT MB 660 UC MS | Sennheiser HD 400S |
|---|
| 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 | Sennheiser HD 400S |
|---|
| Transmission Range | 25 m | - |
|---|
| CONNECTIONS | EPOS I SENNHEISER IMPACT MB 660 UC MS | Sennheiser HD 400S |
|---|
| Connector Type | - | Headphones (mini-phone stereo 3.5 mm) |
|---|
| OTHERS | EPOS I SENNHEISER IMPACT MB 660 UC MS | Sennheiser HD 400S |
|---|
| Included Accessories | Carrying case, Bluetooth adapter, airplane adapter | - | |
|---|---|---|---|
| Service & Support | Limited warranty - 2 years | Limited warranty - 2 years |
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