In depth comparison and review of Poly Blackwire 325 and Marshall MAJOR IV. 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 | Poly Blackwire 325 | Marshall MAJOR IV |
|---|
| Product Type | Headset - wired - USB, 3.5 mm jack | Headphones - Bluetooth - wireless, wired - 3.5 mm jack | |
|---|---|---|---|
| Series | 300 Series | - | |
| Weight | - | 165 g | |
| Colour | - | Black | Brown | |
| Headband Material | Metal | - | |
| Recommended Use | - | Portable electronics | |
| Bluetooth Range (Operating Distance) | - | 10 m |
| SOUND QUALITY | Poly Blackwire 325 | Marshall MAJOR IV |
|---|
| Headphones Form Factor | On-ear | On-ear | |
|---|---|---|---|
| Headphones Technology | - | Dynamic | |
| Foldable | - | Yes | Marshall MAJOR IV can be folded. |
| Connectivity Technology | Wired | Wireless, wired | |
| Wireless Technology | - | Bluetooth | |
| Bluetooth Version | - | Bluetooth 5.0 | |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 20 - 20000 Hz | 20 - 20000 Hz | Both headphones offer the same frequency response. |
| Sensitivity | - | 99 dB | |
| Impedance | - | 32 Ohm | |
| Diaphragm | - | 40 mm | |
| Features | SoundGuard Technology | - | |
| In-Cord Volume Control | Yes | - |
| MICROPHONE | Poly Blackwire 325 | Marshall MAJOR IV |
|---|
| Form Factor | - | Built-in | |
|---|---|---|---|
| Type | Boom | - | |
| Frequency Response | 100 - 10000 Hz | - |
| REMOTE CONTROL | Poly Blackwire 325 | Marshall MAJOR IV |
|---|
| Controls | Mute, volume, answer/end | Volume, answer/end, play/pause, reject call, skip track |
|---|
| CABLE | Poly Blackwire 325 | Marshall MAJOR IV |
|---|
| Cable Type | Headset cable - 2.13 m | Headphones cable - detachable USB-C charge cable - detachable |
|
|---|---|---|---|
| Cable Length | 2.13 m | - | |
| Detachable Cable | - | Yes |
| FEATURES | Poly Blackwire 325 | Marshall MAJOR IV |
|---|
| Additional Functions | DSP | - |
|---|
| BATTERY AND CHARGING | Poly Blackwire 325 | Marshall MAJOR IV |
|---|
| Battery Type | - | Headphone battery rechargeable - wireless charging | |
|---|---|---|---|
| Battery Life | - | 80 hour(s) | |
| Battery Life Details | - | Continuous playback: up to 80 hours | |
| Charging Time | - | 3 hour(s) |
| CONNECTIONS | Poly Blackwire 325 | Marshall MAJOR IV |
|---|
| Connector Type | USB (4 PIN USB Type A) Headphones (mini-phone 3.5 mm 4-pole) |
Audio line-out / headphones (mini-phone stereo 3.5 mm) |
|---|
| OTHERS | Poly Blackwire 325 | Marshall MAJOR IV |
|---|
| Included Accessories | - | USB-C charging cable | |
|---|---|---|---|
| Service & Support | Limited warranty - 2 years | - |
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