In depth comparison and review of Koss UR 23i and EPOS I SENNHEISER IMPACT MB 660 UC. 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 | Koss UR 23i | EPOS I SENNHEISER IMPACT MB 660 UC |
|---|
| Product Type | Headphones - wired - 3.5 mm jack | Headset - Bluetooth - wireless - NFC - USB, 3.5 mm jack | |
|---|---|---|---|
| Weight | - | 227 g | |
| Colour | White | Black | - | |
| Recommended Use | Portable electronics | Portable electronics, computer | |
| Bluetooth Range (Operating Distance) | - | 25 m |
| SOUND QUALITY | Koss UR 23i | EPOS I SENNHEISER IMPACT MB 660 UC |
|---|
| Headphones Form Factor | Full size | Full size | |
|---|---|---|---|
| Headphones Technology | - | Dynamic | |
| Ear Cups Type | - | Closed | |
| Foldable | - | Yes | EPOS I SENNHEISER IMPACT MB 660 UC can be folded. |
| Connectivity Technology | Wired | Wireless | |
| 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 | 20 - 20000 Hz | 17 - 23000 Hz | EPOS I SENNHEISER IMPACT MB 660 UC offer a larger frequency range than Koss UR 23i. |
| Total Harmonic Distortion (THD) | - | <0.5% | |
| Sensitivity | 94 dB | 118 dB | EPOS I SENNHEISER IMPACT MB 660 UC have higher sensitivity than Koss UR 23i. |
| Impedance | 34 Ohm | 46 Ohm |
| MICROPHONE | Koss UR 23i | EPOS I SENNHEISER IMPACT MB 660 UC |
|---|
| Form Factor | - | Built-in | |
|---|---|---|---|
| Type | On-cable | - | |
| Frequency Response | - | 150 - 6800 Hz | |
| Microphones Included | - | 3 |
| CABLE | Koss UR 23i | EPOS I SENNHEISER IMPACT MB 660 UC |
|---|
| Cable Type | Headphones cable - 1.22 m | Audio cable Micro-USB cable |
|---|
| BATTERY AND CHARGING | Koss UR 23i | EPOS I SENNHEISER IMPACT MB 660 UC |
|---|
| 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 | Koss UR 23i | EPOS I SENNHEISER IMPACT MB 660 UC |
|---|
| Transmission Range | - | 25 m |
|---|
| CONNECTIONS | Koss UR 23i | EPOS I SENNHEISER IMPACT MB 660 UC |
|---|
| Connector Type | Headphones (mini-phone stereo 3.5 mm 4-pole) | - |
|---|
| OTHERS | Koss UR 23i | EPOS I SENNHEISER IMPACT MB 660 UC |
|---|
| Included Accessories | - | Carrying case, Bluetooth adapter, airplane adapter | |
|---|---|---|---|
| Service & Support | Limited warranty - lifetime | Limited warranty - 2 years |
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