In depth comparison and review of EPOS I SENNHEISER IMPACT MB 660 UC and Bowers & Wilkins P9 Signature. 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 | Bowers & Wilkins P9 Signature |
|---|
| Product Type | Headset - Bluetooth - wireless - NFC - USB, 3.5 mm jack | Headphones - wired - 3.5 mm jack | |
|---|---|---|---|
| Weight | 227 g | 413 g | EPOS I SENNHEISER IMPACT MB 660 UC are lighter than EPOS I SENNHEISER IMPACT MB 660 UC headphones. |
| Colour | - | Brown | |
| Earpad Material | - | Leather, memory foam | |
| Headband Material | - | Aluminium, memory foam | |
| Recommended Use | Portable electronics, computer | - | |
| Bluetooth Range (Operating Distance) | 25 m | - |
| SOUND QUALITY | EPOS I SENNHEISER IMPACT MB 660 UC | Bowers & Wilkins P9 Signature |
|---|
| Headphones Form Factor | Full size | Full size | |
|---|---|---|---|
| Headphones Technology | Dynamic | - | |
| Ear Cups Type | 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) | - | |
| 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 | 2 - 30000 Hz | Bowers & Wilkins P9 Signature offer a larger frequency range than EPOS I SENNHEISER IMPACT MB 660 UC. |
| Max Input Power | - | 50 mW | |
| Total Harmonic Distortion (THD) | <0.5% | 0.2% | Bowers & Wilkins P9 Signature have lower total harmonic distortion than EPOS I SENNHEISER IMPACT MB 660 UC. |
| Sensitivity | 118 dB | 111 dB | EPOS I SENNHEISER IMPACT MB 660 UC have higher sensitivity than Bowers & Wilkins P9 Signature. |
| Impedance | 46 Ohm | 22 Ohm | |
| Diaphragm | - | 40 mm |
| MICROPHONE | EPOS I SENNHEISER IMPACT MB 660 UC | Bowers & Wilkins P9 Signature |
|---|
| Form Factor | Built-in | - | |
|---|---|---|---|
| Type | - | On-cable | |
| Frequency Response | 150 - 6800 Hz | - | |
| Microphones Included | 3 | - |
| CABLE | EPOS I SENNHEISER IMPACT MB 660 UC | Bowers & Wilkins P9 Signature |
|---|
| Cable Type | Audio cable Micro-USB cable |
Headphones cable - detachable - 1.2 m Headphones cable - detachable - 5 m |
|
|---|---|---|---|
| Detachable Cable | - | Yes |
| BATTERY AND CHARGING | EPOS I SENNHEISER IMPACT MB 660 UC | Bowers & Wilkins P9 Signature |
|---|
| Battery Type | Headset battery rechargeable - lithium polymer | - | |
|---|---|---|---|
| Battery Capacity | 700 mAh | - | |
| Battery Life | 30 hours | - | |
| Standby Time | 360 hours | - | |
| Charging Time | 3 hours | - |
| WIRELESS LINK | EPOS I SENNHEISER IMPACT MB 660 UC | Bowers & Wilkins P9 Signature |
|---|
| Transmission Range | 25 m | - |
|---|
| CONNECTIONS | EPOS I SENNHEISER IMPACT MB 660 UC | Bowers & Wilkins P9 Signature |
|---|
| Connector Type | - | Headphones (mini-phone 3.5 mm 4-pole) |
|---|
| OTHERS | EPOS I SENNHEISER IMPACT MB 660 UC | Bowers & Wilkins P9 Signature |
|---|
| Included Accessories | Carrying case, Bluetooth adapter, airplane adapter | Carrying case, 3.5 mm to 6.3 mm adapter | |
|---|---|---|---|
| Service & Support | Limited warranty - 2 years | Limited warranty - parts and labour - 2 years |
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