In depth comparison and review of Bowers & Wilkins P9 Signature and Poly Blackwire 325-M. 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 | Bowers & Wilkins P9 Signature | Poly Blackwire 325-M |
|---|
| Product Type | Headphones - wired - 3.5 mm jack | Headset - wired - USB, 3.5 mm jack | |
|---|---|---|---|
| Series | - | 300 Series | |
| Weight | 413 g | - | |
| Colour | Brown | - | |
| Earpad Material | Leather, memory foam | - | |
| Headband Material | Aluminium, memory foam | Metal |
| SOUND QUALITY | Bowers & Wilkins P9 Signature | Poly Blackwire 325-M |
|---|
| Headphones Form Factor | Full size | On-ear | |
|---|---|---|---|
| Foldable | Yes | - | Bowers & Wilkins P9 Signature can be folded. |
| Connectivity Technology | Wired | Wired | |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 2 - 30000 Hz | 20 - 20000 Hz | Bowers & Wilkins P9 Signature offer a larger frequency range than Poly Blackwire 325-M. |
| Max Input Power | 50 mW | - | |
| Total Harmonic Distortion (THD) | 0.2% | - | |
| Sensitivity | 111 dB | - | |
| Impedance | 22 Ohm | - | |
| Diaphragm | 40 mm | - | |
| Features | - | SoundGuard Technology | |
| In-Cord Volume Control | - | Yes |
| MICROPHONE | Bowers & Wilkins P9 Signature | Poly Blackwire 325-M |
|---|
| Type | On-cable | Boom | |
|---|---|---|---|
| Frequency Response | - | 100 - 10000 Hz |
| REMOTE CONTROL | Bowers & Wilkins P9 Signature | Poly Blackwire 325-M |
|---|
| Controls | - | Mute, volume, answer/end |
|---|
| CABLE | Bowers & Wilkins P9 Signature | Poly Blackwire 325-M |
|---|
| Cable Type | Headphones cable - detachable - 1.2 m Headphones cable - detachable - 5 m |
Headset cable - 2.13 m | |
|---|---|---|---|
| Cable Length | - | 2.13 m | |
| Detachable Cable | Yes | - |
| FEATURES | Bowers & Wilkins P9 Signature | Poly Blackwire 325-M |
|---|
| Additional Functions | - | DSP |
|---|
| CONNECTIONS | Bowers & Wilkins P9 Signature | Poly Blackwire 325-M |
|---|
| Connector Type | Headphones (mini-phone 3.5 mm 4-pole) | USB (4 PIN USB Type A) Headphones (mini-phone 3.5 mm 4-pole) |
|---|
| OTHERS | Bowers & Wilkins P9 Signature | Poly Blackwire 325-M |
|---|
| Included Accessories | Carrying case, 3.5 mm to 6.3 mm adapter | - | |
|---|---|---|---|
| Service & Support | Limited warranty - parts and labour - 2 years | Limited warranty - 2 years |
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