In depth comparison and review of Sennheiser HD 4.40 and Poly SupraPlus SDS 1031-15. 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 | Sennheiser HD 4.40 | Poly SupraPlus SDS 1031-15 |
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| Product Type | Headphones - Bluetooth - wireless - NFC | Headset |
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| SOUND QUALITY | Sennheiser HD 4.40 | Poly SupraPlus SDS 1031-15 |
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| Headphones Form Factor | Full size | - | |
|---|---|---|---|
| Headphones Technology | - | Dynamic | |
| Ear Cups Type | Closed | - | |
| Connectivity Technology | Wireless | - | |
| Wireless Technology | Bluetooth | - | |
| Bluetooth Version | Bluetooth 4.0 | - | |
| Sound Output Mode | Stereo | - | |
| Frequency Response | 18 - 22000 Hz | - | |
| Total Harmonic Distortion (THD) | 0.5% | - | |
| Sensitivity | 113 dB | - | |
| Impedance | 18 Ohm | - |
| MICROPHONE | Sennheiser HD 4.40 | Poly SupraPlus SDS 1031-15 |
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| Form Factor | Built-in | - | |
|---|---|---|---|
| Microphone Operation Mode | Omni-directional | - | |
| Frequency Response | 100 - 10000 Hz | - | |
| Microphones Included | 2 | - |
| REMOTE CONTROL | Sennheiser HD 4.40 | Poly SupraPlus SDS 1031-15 |
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| Controls | - | Push to Talk (PTT) |
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| CABLE | Sennheiser HD 4.40 | Poly SupraPlus SDS 1031-15 |
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| Cable Type | - | Quick Disconnect to LEMO FFP.2S.310 cable |
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| BATTERY AND CHARGING | Sennheiser HD 4.40 | Poly SupraPlus SDS 1031-15 |
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| Battery Type | Headphone battery lithium polymer | - |
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| OTHERS | Sennheiser HD 4.40 | Poly SupraPlus SDS 1031-15 |
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| TAA Compliant | - | Yes |
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