In depth comparison and review of Sennheiser HD 4.40 and Poly Voyager Focus B825. 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 Voyager Focus B825 |
|---|
| Product Type | Headphones - Bluetooth - wireless - NFC | Headset - Bluetooth - wireless - USB-A via Bluetooth adapter | |
|---|---|---|---|
| Height | - | 7 cm | |
| Width | - | 18.3 cm | |
| Depth | - | 16 cm | |
| Weight | - | 155 g | |
| Colour | - | Black | |
| Recommended Use | - | Portable electronics, computer | |
| Bluetooth Range (Operating Distance) | - | 30 m |
| SOUND QUALITY | Sennheiser HD 4.40 | Poly Voyager Focus B825 |
|---|
| Headphones Form Factor | Full size | On-ear | |
|---|---|---|---|
| Ear Cups Type | Closed | - | |
| Connectivity Technology | Wireless | Wireless | |
| Wireless Technology | Bluetooth | Bluetooth | |
| Bluetooth Version | Bluetooth 4.0 | Bluetooth 4.1 | Poly Voyager Focus B825 have a more advanced version of Bluetooth than Sennheiser HD 4.40. |
| Active Noise Cancelling | - | Yes | Poly Voyager Focus B825 are equipped with active noice cancellation. |
| Active Noise Cancelling Technology | - | SoundGuard DIGITAL | |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 18 - 22000 Hz | 20 - 20000 Hz | Sennheiser HD 4.40 offer a larger frequency range than Poly Voyager Focus B825. |
| Total Harmonic Distortion (THD) | 0.5% | - | |
| Sensitivity | 113 dB | - | |
| Impedance | 18 Ohm | - | |
| Diaphragm | - | 32 mm | |
| Simultaneously Connectable Devices Qty (Multipoint) | - | 8 | Poly Voyager Focus B825 have the ability to connect to multiple devices simultaneously. |
| Features | - | Smart Sensor Technology |
| MICROPHONE | Sennheiser HD 4.40 | Poly Voyager Focus B825 |
|---|
| Form Factor | Built-in | - | |
|---|---|---|---|
| Type | - | Boom | |
| Microphone Operation Mode | Omni-directional | MEMS-directional | |
| Frequency Response | 100 - 10000 Hz | 100 - 6700 Hz | Sennheiser HD 4.40 offer a larger microphone frequency range than Poly Voyager Focus B825. |
| Microphones Included | 2 | 3 | Poly Voyager Focus B825 have a built-in microphone. |
| REMOTE CONTROL | Sennheiser HD 4.40 | Poly Voyager Focus B825 |
|---|
| Controls | - | Volume, answer/end, microphone on/mute, play/pause |
|---|
| CABLE | Sennheiser HD 4.40 | Poly Voyager Focus B825 |
|---|
| Cable Type | - | Micro-USB charging cable |
|---|
| BATTERY AND CHARGING | Sennheiser HD 4.40 | Poly Voyager Focus B825 |
|---|
| Battery Type | Headphone battery lithium polymer | Headset battery rechargeable | |
|---|---|---|---|
| Battery Capacity | - | 325 mAh | |
| Battery Life | - | 15 hour(s) | |
| Battery Life Details | - | Continuous playback (AAC, active noise-cancelling on): up to 12 hours Continuous talk (active noise-cancelling off): up to 12 hours Continuous talk (active noise-cancelling on): up to 10 hours Continuous playback (active noise-cancelling off): up to 15 hours |
|
| Charging Time | - | 2 hour(s) |
| OTHERS | Sennheiser HD 4.40 | Poly Voyager Focus B825 |
|---|
| Included Accessories | - | Travel pouch, BT700 Bluetooth USB adapter | |
|---|---|---|---|
| Software Certification | - | Certified for Skype for Business | |
| TAA Compliant | - | Yes |
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