In depth comparison and review of Sennheiser HD 4.40 and Poly Blackwire 3225 (3300 Series). 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 Blackwire 3225 (3300 Series) |
|---|
| Product Type | Headphones - Bluetooth - wireless - NFC | Headset - wired - USB, 3.5 mm jack | |
|---|---|---|---|
| Series | - | 3300 Series | |
| Height | - | 17.8 cm | |
| Width | - | 15.5 cm | |
| Depth | - | 3.2 cm | |
| Weight | - | 64 g | |
| Colour | - | Black | |
| Earpad Material | - | Artificial leather | |
| Recommended Use | - | Computer |
| SOUND QUALITY | Sennheiser HD 4.40 | Poly Blackwire 3225 (3300 Series) |
|---|
| Headphones Form Factor | Full size | On-ear | |
|---|---|---|---|
| Ear Cups Type | Closed | - | |
| Adjustable Headband | - | Yes | |
| Connectivity Technology | Wireless | Wired | |
| Wireless Technology | Bluetooth | - | |
| Bluetooth Version | Bluetooth 4.0 | - | |
| 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) | 0.5% | - | |
| Sensitivity | 113 dB | 90 dB | Sennheiser HD 4.40 have higher sensitivity than Poly Blackwire 3225 (3300 Series). |
| Impedance | 18 Ohm | 32 Ohm | |
| Diaphragm | - | 28 mm | |
| Features | - | Digital signal processing, Dynamic EQ optimised | |
| In-Cord Volume Control | - | Yes |
| MICROPHONE | Sennheiser HD 4.40 | Poly Blackwire 3225 (3300 Series) |
|---|
| Form Factor | Built-in | - | |
|---|---|---|---|
| Type | - | Boom | |
| Microphone Operation Mode | Omni-directional | Omni-directional | |
| Frequency Response | 100 - 10000 Hz | 100 - 10000 Hz | The frequency response of the microphones in both headphones is the same. |
| Sensitivity | - | -38 dBV/Pascal | |
| Microphones Included | 2 | - |
| REMOTE CONTROL | Sennheiser HD 4.40 | Poly Blackwire 3225 (3300 Series) |
|---|
| Controls | - | Mute, volume, answer/end, hold, redial |
|---|
| CABLE | Sennheiser HD 4.40 | Poly Blackwire 3225 (3300 Series) |
|---|
| Cable Type | - | USB-A cable |
|---|
| BATTERY AND CHARGING | Sennheiser HD 4.40 | Poly Blackwire 3225 (3300 Series) |
|---|
| Battery Type | Headphone battery lithium polymer | - |
|---|
| CONNECTIONS | Sennheiser HD 4.40 | Poly Blackwire 3225 (3300 Series) |
|---|
| Connector Type | - | USB (4 PIN USB Type A) Headset (mini-phone stereo 3.5 mm) |
|---|
| OTHERS | Sennheiser HD 4.40 | 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 |
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