Side by side comparison and review of Sennheiser HD 820 and Poly Blackwire C725-UC. 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 | Sennheiser HD 820 | Poly Blackwire C725-UC |
|---|
| Product Type | Headphones - wired | Headset - wired - USB | |
|---|---|---|---|
| Series | - | 700 Series | |
| Weight | 360 g | - | |
| Earpad Material | Microfibre | - | |
| Recommended Use | - | Computer |
| SOUND QUALITY | Sennheiser HD 820 | Poly Blackwire C725-UC |
|---|
| Headphones Form Factor | Full size | On-ear | |
|---|---|---|---|
| Headphones Technology | Dynamic | - | |
| Ear Cups Type | Closed | - | |
| Connectivity Technology | Wired | Wired | |
| Active Noise Cancelling | - | Yes | Poly Blackwire C725-UC are equipped with active noice cancellation. |
| Active Noise Cancelling Technology | - | SoundGuard | |
| Noise Isolating | Yes | - | Sennheiser HD 820 are equipped with a noise isolating function. |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 6 - 48000 Hz | 20 - 20000 Hz | Sennheiser HD 820 offer a larger frequency range than Poly Blackwire C725-UC. |
| Sensitivity | 103 dB/Vrms | - | |
| Impedance | 300 Ohm | - | |
| In-Cord Volume Control | - | Yes |
| MICROPHONE | Sennheiser HD 820 | Poly Blackwire C725-UC |
|---|
| Form Factor | - | Headset microphone | |
|---|---|---|---|
| Type | - | Boom | |
| Frequency Response | - | 100 - 8000 Hz |
| REMOTE CONTROL | Sennheiser HD 820 | Poly Blackwire C725-UC |
|---|
| Controls | - | Mute, volume, answer/end |
|---|
| CABLE | Sennheiser HD 820 | Poly Blackwire C725-UC |
|---|
| Cable Type | Headphones cable - OFC - 3 m | USB cable - 2.04 m | |
|---|---|---|---|
| Cable Length | 3 m | 2.04 m | |
| Plated Connector | Gold | - |
| CONNECTIONS | Sennheiser HD 820 | Poly Blackwire C725-UC |
|---|
| Connector Type | Headphones (phone stereo 6.3 mm) | USB (4 PIN USB Type A) |
|---|
| OTHERS | Sennheiser HD 820 | Poly Blackwire C725-UC |
|---|
| Included Accessories | USB flash drive, microfibre cleaning cloth, 4.4 mm Pentaconn stereo jack plug, XLR-4 connector | Carrying case | |
|---|---|---|---|
| Service & Support | - | Limited warranty - 2 years |
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