Side by side comparison and review of Koss UR 23i and Poly Blackwire 325. Compare design, sound quality and other key specifications and features to simplify the choice of your perfect headphones. Our goal is to make it easier for you to decide on the headphones that will best meet your expectations by revealing the main differences between the products.
| DESIGN AND DIMENSIONS | Koss UR 23i | Poly Blackwire 325 |
|---|
| Product Type | Headphones - wired - 3.5 mm jack | Headset - wired - USB, 3.5 mm jack | |
|---|---|---|---|
| Series | - | 300 Series | |
| Colour | White | Black | - | |
| Headband Material | - | Metal | |
| Recommended Use | Portable electronics | - |
| SOUND QUALITY | Koss UR 23i | Poly Blackwire 325 |
|---|
| Headphones Form Factor | Full size | On-ear | |
|---|---|---|---|
| Connectivity Technology | Wired | Wired | |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 20 - 20000 Hz | 20 - 20000 Hz | Both headphones offer the same frequency response. |
| Sensitivity | 94 dB | - | |
| Impedance | 34 Ohm | - | |
| Features | - | SoundGuard Technology | |
| In-Cord Volume Control | - | Yes |
| MICROPHONE | Koss UR 23i | Poly Blackwire 325 |
|---|
| Type | On-cable | Boom | |
|---|---|---|---|
| Frequency Response | - | 100 - 10000 Hz |
| REMOTE CONTROL | Koss UR 23i | Poly Blackwire 325 |
|---|
| Controls | - | Mute, volume, answer/end |
|---|
| CABLE | Koss UR 23i | Poly Blackwire 325 |
|---|
| Cable Type | Headphones cable - 1.22 m | Headset cable - 2.13 m | |
|---|---|---|---|
| Cable Length | - | 2.13 m |
| FEATURES | Koss UR 23i | Poly Blackwire 325 |
|---|
| Additional Functions | - | DSP |
|---|
| CONNECTIONS | Koss UR 23i | Poly Blackwire 325 |
|---|
| Connector Type | Headphones (mini-phone stereo 3.5 mm 4-pole) | USB (4 PIN USB Type A) Headphones (mini-phone 3.5 mm 4-pole) |
|---|
| OTHERS | Koss UR 23i | Poly Blackwire 325 |
|---|
| Service & Support | Limited warranty - lifetime | Limited warranty - 2 years |
|---|
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