In depth comparison and review of Poly Blackwire 325 and EPOS I SENNHEISER C20. 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 | Poly Blackwire 325 | EPOS I SENNHEISER C20 |
|---|
| Product Type | Headset - wired - USB, 3.5 mm jack | Headset - Bluetooth - wireless - USB-A via Bluetooth adapter | |
|---|---|---|---|
| Series | 300 Series | C-series | |
| Height | - | 20 cm | |
| Width | - | 16.5 cm | |
| Depth | - | 5.8 cm | |
| Weight | - | 200 g | |
| Colour | - | Black | |
| Headband Material | Metal | - | |
| Bluetooth Range (Operating Distance) | - | 25 m |
| SOUND QUALITY | Poly Blackwire 325 | EPOS I SENNHEISER C20 |
|---|
| Headphones Form Factor | On-ear | On-ear | |
|---|---|---|---|
| Headphones Technology | - | Dynamic | |
| Connectivity Technology | Wired | Wireless | |
| Wireless Technology | - | Bluetooth | |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 20 - 20000 Hz | - | |
| Total Harmonic Distortion (THD) | - | 3% | |
| Features | SoundGuard Technology | EPOS BrainAdapt Technology | |
| In-Cord Volume Control | Yes | - |
| MICROPHONE | Poly Blackwire 325 | EPOS I SENNHEISER C20 |
|---|
| Type | Boom | Boom | |
|---|---|---|---|
| Frequency Response | 100 - 10000 Hz | - |
| REMOTE CONTROL | Poly Blackwire 325 | EPOS I SENNHEISER C20 |
|---|
| Controls | Mute, volume, answer/end | - |
|---|
| CABLE | Poly Blackwire 325 | EPOS I SENNHEISER C20 |
|---|
| Cable Type | Headset cable - 2.13 m | - | |
|---|---|---|---|
| Cable Length | 2.13 m | - |
| FEATURES | Poly Blackwire 325 | EPOS I SENNHEISER C20 |
|---|
| Additional Functions | DSP | - |
|---|
| BATTERY AND CHARGING | Poly Blackwire 325 | EPOS I SENNHEISER C20 |
|---|
| Battery Type | - | Headset battery rechargeable | |
|---|---|---|---|
| Standby Time | - | 300 hours | |
| Charging Time | - | 2 hour(s) |
| CONNECTIONS | Poly Blackwire 325 | EPOS I SENNHEISER C20 |
|---|
| Connector Type | USB (4 PIN USB Type A) Headphones (mini-phone 3.5 mm 4-pole) |
- |
|---|
| OTHERS | Poly Blackwire 325 | EPOS I SENNHEISER C20 |
|---|
| Included Accessories | - | Carrying case, charging cable, BTD 800 USB dongle | |
|---|---|---|---|
| Service & Support | Limited warranty - 2 years | Limited warranty - 2 years |
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