In depth comparison and review of EPOS I SENNHEISER IMPACT MB 660 UC and KEF M500. 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 | KEF M500 |
|---|
| Product Type | Headset - Bluetooth - wireless - NFC - USB, 3.5 mm jack | Headset - wired | |
|---|---|---|---|
| Weight | 227 g | 208 g | KEF M500 are lighter than EPOS I SENNHEISER IMPACT MB 660 UC headphones. |
| Colour | - | Classic | |
| Body Material | - | Aluminium alloy | |
| Recommended Use | Portable electronics, computer | Portable electronics, phone | |
| Bluetooth Range (Operating Distance) | 25 m | - |
| SOUND QUALITY | EPOS I SENNHEISER IMPACT MB 660 UC | KEF M500 |
|---|
| Headphones Form Factor | Full size | On-ear | |
|---|---|---|---|
| Headphones Technology | Dynamic | - | |
| Ear Cups Type | Closed | - | |
| Adjustable Headband | - | Yes | |
| 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 | 20 - 20000 Hz | EPOS I SENNHEISER IMPACT MB 660 UC offer a larger frequency range than KEF M500. |
| Max Input Power | - | 30 mW | |
| Total Harmonic Distortion (THD) | <0.5% | - | |
| Sensitivity | 118 dB | 103 dB | EPOS I SENNHEISER IMPACT MB 660 UC have higher sensitivity than KEF M500. |
| Impedance | 46 Ohm | 32 Ohm | |
| Diaphragm | - | 40 mm | |
| Magnet Material | - | Neodymium | |
| In-Cord Volume Control | - | Yes |
| MICROPHONE | EPOS I SENNHEISER IMPACT MB 660 UC | KEF M500 |
|---|
| Form Factor | Built-in | - | |
|---|---|---|---|
| Type | - | On-cable | |
| Frequency Response | 150 - 6800 Hz | - | |
| Microphones Included | 3 | - |
| REMOTE CONTROL | EPOS I SENNHEISER IMPACT MB 660 UC | KEF M500 |
|---|
| Controls | - | Volume, answer/end, play/pause, next/previous track |
|---|
| CABLE | EPOS I SENNHEISER IMPACT MB 660 UC | KEF M500 |
|---|
| Cable Type | Audio cable Micro-USB cable |
2 x headset cable - 1.3 m | |
|---|---|---|---|
| Plated Connector | - | Gold |
| BATTERY AND CHARGING | EPOS I SENNHEISER IMPACT MB 660 UC | KEF M500 |
|---|
| 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 | KEF M500 |
|---|
| Transmission Range | 25 m | - |
|---|
| CONNECTIONS | EPOS I SENNHEISER IMPACT MB 660 UC | KEF M500 |
|---|
| Connector Type | - | Headset (mini-phone stereo 3.5 mm) |
|---|
| OTHERS | EPOS I SENNHEISER IMPACT MB 660 UC | KEF M500 |
|---|
| Included Accessories | Carrying case, Bluetooth adapter, airplane adapter | Protective case, in-flight plug adapter, 3.5 mm to 6.3 mm adapter | |
|---|---|---|---|
| Service & Support | Limited warranty - 2 years | Limited warranty - 1 year |
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