In depth comparison and review of Koss UR 23i and Sennheiser HD 4.40. 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 | Sennheiser HD 4.40 |
|---|
| Product Type | Headphones - wired - 3.5 mm jack | Headphones - Bluetooth - wireless - NFC | |
|---|---|---|---|
| Colour | White | Black | - | |
| Recommended Use | Portable electronics | - |
| SOUND QUALITY | Koss UR 23i | Sennheiser HD 4.40 |
|---|
| Headphones Form Factor | Full size | Full size | |
|---|---|---|---|
| Ear Cups Type | - | Closed | |
| Connectivity Technology | Wired | Wireless | |
| Wireless Technology | - | Bluetooth | |
| Bluetooth Version | - | Bluetooth 4.0 | |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 20 - 20000 Hz | 18 - 22000 Hz | Sennheiser HD 4.40 offer a larger frequency range than Koss UR 23i. |
| Total Harmonic Distortion (THD) | - | 0.5% | |
| Sensitivity | 94 dB | 113 dB | Sennheiser HD 4.40 have higher sensitivity than Koss UR 23i. |
| Impedance | 34 Ohm | 18 Ohm |
| MICROPHONE | Koss UR 23i | Sennheiser HD 4.40 |
|---|
| Form Factor | - | Built-in | |
|---|---|---|---|
| Type | On-cable | - | |
| Microphone Operation Mode | - | Omni-directional | |
| Frequency Response | - | 100 - 10000 Hz | |
| Microphones Included | - | 2 |
| CABLE | Koss UR 23i | Sennheiser HD 4.40 |
|---|
| Cable Type | Headphones cable - 1.22 m | - |
|---|
| BATTERY AND CHARGING | Koss UR 23i | Sennheiser HD 4.40 |
|---|
| Battery Type | - | Headphone battery lithium polymer |
|---|
| CONNECTIONS | Koss UR 23i | Sennheiser HD 4.40 |
|---|
| Connector Type | Headphones (mini-phone stereo 3.5 mm 4-pole) | - |
|---|
| OTHERS | Koss UR 23i | Sennheiser HD 4.40 |
|---|
| Service & Support | Limited warranty - lifetime | - |
|---|
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