Detailed comparison and review of Poly Blackwire 325 and Sony WH-CH520. 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 | Poly Blackwire 325 | Sony WH-CH520 |
|---|
| Product Type | Headset - wired - USB, 3.5 mm jack | Headphones - Bluetooth - wireless | |
|---|---|---|---|
| Series | 300 Series | - | |
| Weight | - | 147 g | |
| Colour | - | Beige | Black | Blue | White | |
| Body Material | - | Recycled plastic | |
| Headband Material | Metal | - | |
| Recommended Use | - | Portable electronics | |
| Bluetooth Range (Operating Distance) | - | 10 m |
| SOUND QUALITY | Poly Blackwire 325 | Sony WH-CH520 |
|---|
| Headphones Form Factor | On-ear | On-ear | |
|---|---|---|---|
| Ear Cups Type | - | Closed | |
| Adjustable Headband | - | Yes | |
| Connectivity Technology | Wired | Wireless | |
| Wireless Technology | - | Bluetooth | |
| Bluetooth Version | - | Bluetooth 5.2 | |
| Bluetooth Profiles | - | Hands-Free Profile (HFP), Headset Profile (HSP), Advanced Audio Distribution Profile (A2DP), Audio/Video Remote Control Profile (AVRCP) | |
| Bluetooth Audio Codec | - | SBC, AAC | |
| Sound Output Mode | Stereo | Stereo | |
| Sound Effects | - | Digital Sound Enhancement Engine (DSEE), 360 Reality Audio | |
| Frequency Response | 20 - 20000 Hz | 20 - 20000 Hz | Both headphones offer the same frequency response. |
| Diaphragm | - | 30 mm | |
| Simultaneously Connectable Devices Qty (Multipoint) | - | 2 | Sony WH-CH520 have the ability to connect to multiple devices simultaneously. |
| Features | SoundGuard Technology | MultiPoint Technology, Google Fast Pair, Microsoft Swift Pair | |
| In-Cord Volume Control | Yes | - |
| MICROPHONE | Poly Blackwire 325 | Sony WH-CH520 |
|---|
| Form Factor | - | Built-in | |
|---|---|---|---|
| Type | Boom | - | |
| Frequency Response | 100 - 10000 Hz | - |
| REMOTE CONTROL | Poly Blackwire 325 | Sony WH-CH520 |
|---|
| Controls | Mute, volume, answer/end | Volume, play/pause, skip track |
|---|
| CABLE | Poly Blackwire 325 | Sony WH-CH520 |
|---|
| Cable Type | Headset cable - 2.13 m | USB-C charge cable | |
|---|---|---|---|
| Cable Length | 2.13 m | - |
| FEATURES | Poly Blackwire 325 | Sony WH-CH520 |
|---|
| Internet of Things (IoT) Compatible | - | Yes | |
|---|---|---|---|
| Voice Control | - | Direct | |
| Intelligent Assistant | - | Siri, Google Assistant | |
| Additional Functions | DSP | - |
| BATTERY AND CHARGING | Poly Blackwire 325 | Sony WH-CH520 |
|---|
| Battery Type | - | Headphone battery rechargeable | |
|---|---|---|---|
| Battery Life | - | 50 hour(s) | |
| Battery Life Details | - | Continuous playback: up to 50 hours Continuous talk: up to 40 hours |
|
| Standby Time | - | 200 hours | |
| Charging Time | - | 3 hour(s) |
| CONNECTIONS | Poly Blackwire 325 | Sony WH-CH520 |
|---|
| Connector Type | USB (4 PIN USB Type A) Headphones (mini-phone 3.5 mm 4-pole) |
USB (power only) (USB Type-C) Bluetooth |
|---|
| OTHERS | Poly Blackwire 325 | Sony WH-CH520 |
|---|
| Service & Support | Limited warranty - 2 years | - |
|---|
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