Detailed comparison and review of Koss UR 23i 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 | Koss UR 23i | Sennheiser HD 400S |
|---|
| Product Type | Headphones - wired - 3.5 mm jack | Headphones - wired - 3.5 mm jack | |
|---|---|---|---|
| Weight | - | 217 g | |
| Colour | White | Black | Black | |
| Recommended Use | Portable electronics | Portable electronics |
| SOUND QUALITY | Koss UR 23i | Sennheiser HD 400S |
|---|
| Headphones Form Factor | Full size | Full size | |
|---|---|---|---|
| Headphones Technology | - | Dynamic | |
| Ear Cups Type | - | Closed | |
| Foldable | - | Yes | Sennheiser HD 400S can be folded. |
| Connectivity Technology | Wired | Wired | |
| Noise Isolating | - | Yes | Sennheiser HD 400S are equipped with a noise isolating function. |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 20 - 20000 Hz | 18 - 20000 Hz | Sennheiser HD 400S offer a larger frequency range than Koss UR 23i. |
| Total Harmonic Distortion (THD) | - | 0.5% | |
| Sensitivity | 94 dB | - | |
| Impedance | 34 Ohm | 18 Ohm | |
| Max Sound Pressure | - | 120 dB |
| MICROPHONE | Koss UR 23i | Sennheiser HD 400S |
|---|
| Type | On-cable | On-cable | |
|---|---|---|---|
| Frequency Response | - | 100 - 10000 Hz |
| REMOTE CONTROL | Koss UR 23i | Sennheiser HD 400S |
|---|
| Controls | - | Answer/end, play/pause, next/previous track |
|---|
| CABLE | Koss UR 23i | Sennheiser HD 400S |
|---|
| Cable Type | Headphones cable - 1.22 m | Headphones cable - detachable - L shaped / mini-phone stereo 3.5 mm - 1.4 m | |
|---|---|---|---|
| Cable Length | - | 1.4 m | |
| Detachable Cable | - | Yes |
| CONNECTIONS | Koss UR 23i | Sennheiser HD 400S |
|---|
| Connector Type | Headphones (mini-phone stereo 3.5 mm 4-pole) | Headphones (mini-phone stereo 3.5 mm) |
|---|
| OTHERS | Koss UR 23i | Sennheiser HD 400S |
|---|
| Service & Support | Limited warranty - lifetime | Limited warranty - 2 years |
|---|
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