Side by side comparison and review of Poly Blackwire 325-M and beyerdynamic DT 990 PRO. 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 | Poly Blackwire 325-M | beyerdynamic DT 990 PRO |
|---|
| Product Type | Headset - wired - USB, 3.5 mm jack | Headphones - wired - 3.5 mm jack | |
|---|---|---|---|
| Series | 300 Series | - | |
| Weight | - | 250 g | |
| Colour | - | Black | |
| Headband Material | Metal | - |
| SOUND QUALITY | Poly Blackwire 325-M | beyerdynamic DT 990 PRO |
|---|
| Headphones Form Factor | On-ear | Full size | |
|---|---|---|---|
| Headphones Technology | - | Dynamic | |
| Ear Cups Type | - | Open | |
| Connectivity Technology | Wired | Wired | |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 20 - 20000 Hz | 5 - 35000 Hz | beyerdynamic DT 990 PRO offer a larger frequency range than Poly Blackwire 325-M. |
| Max Input Power | - | 100 mW | |
| Total Harmonic Distortion (THD) | - | 0.2% | |
| Sensitivity | - | 96 dB | |
| Impedance | - | 250 Ohm | |
| Features | SoundGuard Technology | - | |
| In-Cord Volume Control | Yes | - |
| MICROPHONE | Poly Blackwire 325-M | beyerdynamic DT 990 PRO |
|---|
| Type | Boom | - | |
|---|---|---|---|
| Frequency Response | 100 - 10000 Hz | - |
| REMOTE CONTROL | Poly Blackwire 325-M | beyerdynamic DT 990 PRO |
|---|
| Controls | Mute, volume, answer/end | - |
|---|
| CABLE | Poly Blackwire 325-M | beyerdynamic DT 990 PRO |
|---|
| Cable Type | Headset cable - 2.13 m | Headphones cable - 3 m | |
|---|---|---|---|
| Cable Length | 2.13 m | 3 m | |
| Plated Connector | - | Gold |
| FEATURES | Poly Blackwire 325-M | beyerdynamic DT 990 PRO |
|---|
| Additional Functions | DSP | - |
|---|
| CONNECTIONS | Poly Blackwire 325-M | beyerdynamic DT 990 PRO |
|---|
| Connector Type | USB (4 PIN USB Type A) Headphones (mini-phone 3.5 mm 4-pole) |
Headphones (mini-phone 3.5mm) |
|---|
| OTHERS | Poly Blackwire 325-M | beyerdynamic DT 990 PRO |
|---|
| Included Accessories | - | 6.3 mm (1/4") stereo adapter | |
|---|---|---|---|
| Service & Support | Limited warranty - 2 years | - |
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