In depth comparison and review of Poly Blackwire 325 and Sennheiser HMDC 27. 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 | Sennheiser HMDC 27 |
|---|
| Product Type | Headset - wired - USB, 3.5 mm jack | Headset - wired | |
|---|---|---|---|
| Series | 300 Series | - | |
| Weight | - | 240 g | |
| Headband Material | Metal | - | |
| Recommended Use | - | Professional audio |
| SOUND QUALITY | Poly Blackwire 325 | Sennheiser HMDC 27 |
|---|
| Headphones Form Factor | On-ear | Full size | |
|---|---|---|---|
| Headphones Technology | - | Dynamic | |
| Ear Cups Type | - | Closed | |
| Connectivity Technology | Wired | Wired | |
| Active Noise Cancelling | - | Yes | Sennheiser HMDC 27 are equipped with active noice cancellation. |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 20 - 20000 Hz | 8 - 18000 Hz | Poly Blackwire 325 offer a larger frequency range than Sennheiser HMDC 27. |
| Total Harmonic Distortion (THD) | - | <0.1% | |
| Max Sound Pressure | - | 128 dB | |
| Features | SoundGuard Technology | - | |
| In-Cord Volume Control | Yes | - |
| MICROPHONE | Poly Blackwire 325 | Sennheiser HMDC 27 |
|---|
| Type | Boom | Boom | |
|---|---|---|---|
| Microphone Technology | - | Dynamic | |
| Microphone Operation Mode | - | Hypercardioid | |
| Frequency Response | 100 - 10000 Hz | 40 - 18000 Hz | Sennheiser HMDC 27 offer a larger microphone frequency range than Poly Blackwire 325. |
| REMOTE CONTROL | Poly Blackwire 325 | Sennheiser HMDC 27 |
|---|
| Controls | Mute, volume, answer/end | - |
|---|
| CABLE | Poly Blackwire 325 | Sennheiser HMDC 27 |
|---|
| Cable Type | Headset cable - 2.13 m | - | |
|---|---|---|---|
| Cable Length | 2.13 m | - |
| FEATURES | Poly Blackwire 325 | Sennheiser HMDC 27 |
|---|
| Features | - | EPOS ActiveGard | |
|---|---|---|---|
| Additional Functions | DSP | - |
| CONNECTIONS | Poly Blackwire 325 | Sennheiser HMDC 27 |
|---|
| Connector Type | USB (4 PIN USB Type A) Headphones (mini-phone 3.5 mm 4-pole) |
- |
|---|
| OTHERS | Poly Blackwire 325 | Sennheiser HMDC 27 |
|---|
| Included Accessories | - | Wind screen, cable clip, headband padding | |
|---|---|---|---|
| Service & Support | Limited warranty - 2 years | - |
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