In depth comparison and review of EPOS I SENNHEISER C20 and Poly Blackwire 3225 (3300 Series). 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 | EPOS I SENNHEISER C20 | Poly Blackwire 3225 (3300 Series) |
|---|
| Product Type | Headset - Bluetooth - wireless - USB-A via Bluetooth adapter | Headset - wired - USB, 3.5 mm jack | |
|---|---|---|---|
| Series | C-series | 3300 Series | |
| Height | 20 cm | 17.8 cm | |
| Width | 16.5 cm | 15.5 cm | |
| Depth | 5.8 cm | 3.2 cm | |
| Weight | 200 g | 64 g | Poly Blackwire 3225 (3300 Series) are lighter than EPOS I SENNHEISER C20 headphones. |
| Colour | Black | Black | |
| Earpad Material | - | Artificial leather | |
| Recommended Use | - | Computer | |
| Bluetooth Range (Operating Distance) | 25 m | - |
| SOUND QUALITY | EPOS I SENNHEISER C20 | Poly Blackwire 3225 (3300 Series) |
|---|
| Headphones Form Factor | On-ear | On-ear | |
|---|---|---|---|
| Headphones Technology | Dynamic | - | |
| Adjustable Headband | - | Yes | |
| Connectivity Technology | Wireless | Wired | |
| Wireless Technology | Bluetooth | - | |
| Active Noise Cancelling | - | Yes | Poly Blackwire 3225 (3300 Series) are equipped with active noice cancellation. |
| Active Noise Cancelling Technology | - | SoundGuard | |
| Sound Output Mode | Stereo | Stereo | |
| Total Harmonic Distortion (THD) | 3% | - | |
| Sensitivity | - | 90 dB | |
| Impedance | - | 32 Ohm | |
| Diaphragm | - | 28 mm | |
| Features | EPOS BrainAdapt Technology | Digital signal processing, Dynamic EQ optimised | |
| In-Cord Volume Control | - | Yes |
| MICROPHONE | EPOS I SENNHEISER C20 | Poly Blackwire 3225 (3300 Series) |
|---|
| Type | Boom | Boom | |
|---|---|---|---|
| Microphone Operation Mode | - | Omni-directional | |
| Frequency Response | - | 100 - 10000 Hz | |
| Sensitivity | - | -38 dBV/Pascal |
| REMOTE CONTROL | EPOS I SENNHEISER C20 | Poly Blackwire 3225 (3300 Series) |
|---|
| Controls | - | Mute, volume, answer/end, hold, redial |
|---|
| CABLE | EPOS I SENNHEISER C20 | Poly Blackwire 3225 (3300 Series) |
|---|
| Cable Type | - | USB-A cable |
|---|
| BATTERY AND CHARGING | EPOS I SENNHEISER C20 | Poly Blackwire 3225 (3300 Series) |
|---|
| Battery Type | Headset battery rechargeable | - | |
|---|---|---|---|
| Standby Time | 300 hours | - | |
| Charging Time | 2 hour(s) | - |
| CONNECTIONS | EPOS I SENNHEISER C20 | Poly Blackwire 3225 (3300 Series) |
|---|
| Connector Type | - | USB (4 PIN USB Type A) Headset (mini-phone stereo 3.5 mm) |
|---|
| OTHERS | EPOS I SENNHEISER C20 | Poly Blackwire 3225 (3300 Series) |
|---|
| Included Accessories | Carrying case, charging cable, BTD 800 USB dongle | - | |
|---|---|---|---|
| Compatibility | - | Mac, Windows | |
| Software Certification | - | Skype Certified, Avaya Certified, Cisco Jabber Certified | |
| Supported Host Device OS | - | Windows 10, macOS, Windows 11 | |
| Service & Support | Limited warranty - 2 years | - |
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