In depth comparison and review of V7 HA520-2EP 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 | V7 HA520-2EP | Poly Blackwire 3225 (3300 Series) |
|---|
| Product Type | Headphones - wired - 3.5 mm jack | Headset - wired - USB, 3.5 mm jack | |
|---|---|---|---|
| Series | - | 3300 Series | |
| Height | 18.8 cm | 17.8 cm | |
| Width | 6.8 cm | 15.5 cm | |
| Depth | 14.8 cm | 3.2 cm | |
| Weight | 163.5 g | 64 g | Poly Blackwire 3225 (3300 Series) are lighter than V7 HA520-2EP headphones. |
| Colour | Black | Black | |
| Earpad Material | - | Artificial leather | |
| Recommended Use | - | Computer |
| SOUND QUALITY | V7 HA520-2EP | Poly Blackwire 3225 (3300 Series) |
|---|
| Headphones Form Factor | On-ear | On-ear | |
|---|---|---|---|
| Adjustable Headband | Yes | Yes | |
| Connectivity Technology | Wired | Wired | |
| 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 | 20 - 20000 Hz | - | |
| Sensitivity | 110 dB | 90 dB | V7 HA520-2EP have higher sensitivity than Poly Blackwire 3225 (3300 Series). |
| Impedance | 32 Ohm | 32 Ohm | |
| Diaphragm | 40 mm | 28 mm | V7 HA520-2EP have a thicker diaphragm than Poly Blackwire 3225 (3300 Series). |
| Features | - | Digital signal processing, Dynamic EQ optimised | |
| In-Cord Volume Control | Yes | Yes |
| MICROPHONE | V7 HA520-2EP | Poly Blackwire 3225 (3300 Series) |
|---|
| Type | - | Boom | |
|---|---|---|---|
| Microphone Operation Mode | - | Omni-directional | |
| Frequency Response | - | 100 - 10000 Hz | |
| Sensitivity | - | -38 dBV/Pascal |
| REMOTE CONTROL | V7 HA520-2EP | Poly Blackwire 3225 (3300 Series) |
|---|
| Controls | - | Mute, volume, answer/end, hold, redial |
|---|
| CABLE | V7 HA520-2EP | Poly Blackwire 3225 (3300 Series) |
|---|
| Cable Type | Headphones cable - 1.8 m | USB-A cable | |
|---|---|---|---|
| Cable Length | 1.8 m | - |
| CONNECTIONS | V7 HA520-2EP | Poly Blackwire 3225 (3300 Series) |
|---|
| Connector Type | Headphones (mini-phone stereo 3.5 mm) | USB (4 PIN USB Type A) Headset (mini-phone stereo 3.5 mm) |
|---|
| OTHERS | V7 HA520-2EP | 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 | |
| Compliant Standards | FCC, RoHS | - | |
| Service & Support | Limited warranty - 2 years | - |
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