Side by side comparison and review of KEF M500 and Poly Blackwire 325-M. 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 | KEF M500 | Poly Blackwire 325-M |
|---|
| Product Type | Headset - wired | Headset - wired - USB, 3.5 mm jack | |
|---|---|---|---|
| Series | - | 300 Series | |
| Weight | 208 g | - | |
| Colour | Classic | - | |
| Body Material | Aluminium alloy | - | |
| Headband Material | - | Metal | |
| Recommended Use | Portable electronics, phone | - |
| SOUND QUALITY | KEF M500 | Poly Blackwire 325-M |
|---|
| Headphones Form Factor | On-ear | On-ear | |
|---|---|---|---|
| Adjustable Headband | Yes | - | |
| Foldable | Yes | - | KEF M500 can be folded. |
| Connectivity Technology | Wired | Wired | |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 20 - 20000 Hz | 20 - 20000 Hz | Both headphones offer the same frequency response. |
| Max Input Power | 30 mW | - | |
| Sensitivity | 103 dB | - | |
| Impedance | 32 Ohm | - | |
| Diaphragm | 40 mm | - | |
| Magnet Material | Neodymium | - | |
| Features | - | SoundGuard Technology | |
| In-Cord Volume Control | Yes | Yes |
| MICROPHONE | KEF M500 | Poly Blackwire 325-M |
|---|
| Type | On-cable | Boom | |
|---|---|---|---|
| Frequency Response | - | 100 - 10000 Hz |
| REMOTE CONTROL | KEF M500 | Poly Blackwire 325-M |
|---|
| Controls | Volume, answer/end, play/pause, next/previous track | Mute, volume, answer/end |
|---|
| CABLE | KEF M500 | Poly Blackwire 325-M |
|---|
| Cable Type | 2 x headset cable - 1.3 m | Headset cable - 2.13 m | |
|---|---|---|---|
| Cable Length | - | 2.13 m | |
| Plated Connector | Gold | - |
| FEATURES | KEF M500 | Poly Blackwire 325-M |
|---|
| Additional Functions | - | DSP |
|---|
| CONNECTIONS | KEF M500 | Poly Blackwire 325-M |
|---|
| Connector Type | Headset (mini-phone stereo 3.5 mm) | USB (4 PIN USB Type A) Headphones (mini-phone 3.5 mm 4-pole) |
|---|
| OTHERS | KEF M500 | Poly Blackwire 325-M |
|---|
| Included Accessories | Protective case, in-flight plug adapter, 3.5 mm to 6.3 mm adapter | - | |
|---|---|---|---|
| Service & Support | Limited warranty - 1 year | Limited warranty - 2 years |
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