Detailed comparison and review of KEF M500 and Poly Blackwire 3225 (3300 Series). With our comprehensive overview, you can simply compare design, sound quality, but also other key features of both headphones and easily decide which ones are the right choice for you. Our goal is to help you identify the main differences between products and find the headphones that best fit your needs and expectations.
| DESIGN AND DIMENSIONS | KEF M500 | Poly Blackwire 3225 (3300 Series) |
|---|
| Product Type | Headset - wired | Headset - wired - USB, 3.5 mm jack | |
|---|---|---|---|
| Series | - | 3300 Series | |
| Height | - | 17.8 cm | |
| Width | - | 15.5 cm | |
| Depth | - | 3.2 cm | |
| Weight | 208 g | 64 g | Poly Blackwire 3225 (3300 Series) are lighter than KEF M500 headphones. |
| Colour | Classic | Black | |
| Body Material | Aluminium alloy | - | |
| Earpad Material | - | Artificial leather | |
| Recommended Use | Portable electronics, phone | Computer |
| SOUND QUALITY | KEF M500 | Poly Blackwire 3225 (3300 Series) |
|---|
| Headphones Form Factor | On-ear | On-ear | |
|---|---|---|---|
| Adjustable Headband | Yes | Yes | |
| Foldable | Yes | - | KEF M500 can be folded. |
| 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 | - | |
| Max Input Power | 30 mW | - | |
| Sensitivity | 103 dB | 90 dB | KEF M500 have higher sensitivity than Poly Blackwire 3225 (3300 Series). |
| Impedance | 32 Ohm | 32 Ohm | |
| Diaphragm | 40 mm | 28 mm | KEF M500 have a thicker diaphragm than Poly Blackwire 3225 (3300 Series). |
| Magnet Material | Neodymium | - | |
| Features | - | Digital signal processing, Dynamic EQ optimised | |
| In-Cord Volume Control | Yes | Yes |
| MICROPHONE | KEF M500 | Poly Blackwire 3225 (3300 Series) |
|---|
| Type | On-cable | Boom | |
|---|---|---|---|
| Microphone Operation Mode | - | Omni-directional | |
| Frequency Response | - | 100 - 10000 Hz | |
| Sensitivity | - | -38 dBV/Pascal |
| REMOTE CONTROL | KEF M500 | Poly Blackwire 3225 (3300 Series) |
|---|
| Controls | Volume, answer/end, play/pause, next/previous track | Mute, volume, answer/end, hold, redial |
|---|
| CABLE | KEF M500 | Poly Blackwire 3225 (3300 Series) |
|---|
| Cable Type | 2 x headset cable - 1.3 m | USB-A cable | |
|---|---|---|---|
| Plated Connector | Gold | - |
| CONNECTIONS | KEF M500 | Poly Blackwire 3225 (3300 Series) |
|---|
| Connector Type | Headset (mini-phone stereo 3.5 mm) | USB (4 PIN USB Type A) Headset (mini-phone stereo 3.5 mm) |
|---|
| OTHERS | KEF M500 | Poly Blackwire 3225 (3300 Series) |
|---|
| Included Accessories | Protective case, in-flight plug adapter, 3.5 mm to 6.3 mm adapter | - | |
|---|---|---|---|
| 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 - 1 year | - |
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