Side by side comparison and review of Sennheiser HD 350BT and Poly Blackwire 3225 (3300 Series). 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 350BT | Poly Blackwire 3225 (3300 Series) |
|---|
| Product Type | Headphones - Bluetooth - wireless | Headset - wired - USB, 3.5 mm jack | |
|---|---|---|---|
| Series | - | 3300 Series | |
| Height | - | 17.8 cm | |
| Width | - | 15.5 cm | |
| Depth | - | 3.2 cm | |
| Weight | 238 g | 64 g | Poly Blackwire 3225 (3300 Series) are lighter than Sennheiser HD 350BT headphones. |
| Colour | Black | White | Black | |
| Earpad Material | - | Artificial leather | |
| Recommended Use | - | Computer |
| SOUND QUALITY | Sennheiser HD 350BT | Poly Blackwire 3225 (3300 Series) |
|---|
| Headphones Form Factor | Full size | On-ear | |
|---|---|---|---|
| Headphones Technology | Dynamic | - | |
| Ear Cups Type | Closed | - | |
| Adjustable Headband | - | Yes | |
| Foldable | Yes | - | Sennheiser HD 350BT can be folded. |
| Connectivity Technology | Wireless | Wired | |
| Wireless Technology | Bluetooth | - | |
| Bluetooth Version | Bluetooth 5.0 | - | |
| Bluetooth Profiles | Hands-Free Profile (HFP), Headset Profile (HSP), Advanced Audio Distribution Profile (A2DP), Audio/Video Remote Control Profile (AVRCP) | - | |
| Bluetooth Audio Codec | SBC, AAC, aptX, apt-X LL | - | |
| 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 | |
| Frequency Response | 18 - 22000 Hz | - | |
| Total Harmonic Distortion (THD) | <0.3% | - | |
| Sensitivity | - | 90 dB | |
| Impedance | - | 32 Ohm | |
| Max Sound Pressure | 108 dB | - | |
| Diaphragm | - | 28 mm | |
| Features | - | Digital signal processing, Dynamic EQ optimised | |
| In-Cord Volume Control | - | Yes |
| MICROPHONE | Sennheiser HD 350BT | Poly Blackwire 3225 (3300 Series) |
|---|
| Form Factor | Built-in | - | |
|---|---|---|---|
| Type | - | Boom | |
| Microphone Operation Mode | Beamforming | Omni-directional | |
| Frequency Response | 80 - 6000 Hz | 100 - 10000 Hz | Poly Blackwire 3225 (3300 Series) offer a larger microphone frequency range than Sennheiser HD 350BT. |
| Sensitivity | - | -38 dBV/Pascal | |
| Microphones Included | 2 | - |
| REMOTE CONTROL | Sennheiser HD 350BT | Poly Blackwire 3225 (3300 Series) |
|---|
| Controls | - | Mute, volume, answer/end, hold, redial |
|---|
| CABLE | Sennheiser HD 350BT | Poly Blackwire 3225 (3300 Series) |
|---|
| Cable Type | USB-C charge cable - detachable | USB-A cable |
|---|
| BATTERY AND CHARGING | Sennheiser HD 350BT | Poly Blackwire 3225 (3300 Series) |
|---|
| Battery Type | Headphone battery rechargeable - lithium polymer | - | |
|---|---|---|---|
| Battery Capacity | 300 mAh | - | |
| Battery Life | 30 hours | - | |
| Charging Time | 2 hours | - |
| CONNECTIONS | Sennheiser HD 350BT | Poly Blackwire 3225 (3300 Series) |
|---|
| Connector Type | - | USB (4 PIN USB Type A) Headset (mini-phone stereo 3.5 mm) |
|---|
| OTHERS | Sennheiser HD 350BT | Poly Blackwire 3225 (3300 Series) |
|---|
| 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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