Side by side comparison and review of Sennheiser PXC 550-II and Poly Blackwire 3320-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 | Sennheiser PXC 550-II | Poly Blackwire 3320-M |
|---|
| Product Type | Headphones - Bluetooth - wireless | Headset - wired - USB-C | |
|---|---|---|---|
| Series | - | Blackwire 3300 series | |
| Height | 17.4 cm | 17.8 cm | |
| Width | 13.6 cm | 15.5 cm | |
| Depth | 6.3 cm | 3.2 cm | |
| Weight | 227 g | 130 g | Poly Blackwire 3320-M are lighter than Sennheiser PXC 550-II headphones. |
| Colour | - | Black | |
| Earpad Material | - | Foam | |
| Recommended Use | Portable electronics | Portable electronics, computer |
| SOUND QUALITY | Sennheiser PXC 550-II | Poly Blackwire 3320-M |
|---|
| Headphones Form Factor | Full size | On-ear | |
|---|---|---|---|
| Headphones Technology | Dynamic | - | |
| Adjustable Headband | Yes | Yes | |
| Foldable | Yes | - | Sennheiser PXC 550-II can be folded. |
| Connectivity Technology | Wireless | Wired | |
| Wireless Technology | Bluetooth | - | |
| Bluetooth Version | Bluetooth 5.0 | - | |
| 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, aptX, apt-X LL | - | |
| Active Noise Cancelling | Yes | Yes | Both headphones are equipped with active noice cancellation. |
| Active Noise Cancelling Technology | - | SoundGuard | |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 17 - 23000 Hz | 20 - 20000 Hz | Sennheiser PXC 550-II offer a larger frequency range than Poly Blackwire 3320-M. |
| Total Harmonic Distortion (THD) | <0.5% | - | |
| Sensitivity | 110 dB | 116 dB | Poly Blackwire 3320-M have higher sensitivity than Sennheiser PXC 550-II. |
| Impedance | 490 Ohm | 32 Ohm | |
| Max Sound Pressure | - | 118 dB | |
| Diaphragm | 32 mm | 32 mm | Both headphones are designed with same thick diaphragm. |
| Features | - | Dynamic EQ optimised | |
| In-Cord Volume Control | - | Yes |
| MICROPHONE | Sennheiser PXC 550-II | Poly Blackwire 3320-M |
|---|
| Form Factor | Built-in | - | |
|---|---|---|---|
| Type | - | Boom | |
| Frequency Response | 50 - 10000 Hz | 100 - 10000 Hz | Sennheiser PXC 550-II offer a larger microphone frequency range than Poly Blackwire 3320-M. |
| Sensitivity | -34 dBV/Pascal | -38 dB | |
| Microphones Included | 3 | - |
| REMOTE CONTROL | Sennheiser PXC 550-II | Poly Blackwire 3320-M |
|---|
| Controls | Mute, volume, answer/end, hold, play/pause, next/previous track | Mute, volume, answer/end |
|---|
| CABLE | Sennheiser PXC 550-II | Poly Blackwire 3320-M |
|---|
| Cable Type | USB charge cable Audio cable |
- | |
|---|---|---|---|
| Detachable Cable | Yes | - |
| FEATURES | Sennheiser PXC 550-II | Poly Blackwire 3320-M |
|---|
| Internet of Things (IoT) Compatible | Yes | - | |
|---|---|---|---|
| Intelligent Assistant | Siri, Google Assistant, Alexa | - | |
| Additional Functions | Touch panel | - |
| BATTERY AND CHARGING | Sennheiser PXC 550-II | Poly Blackwire 3320-M |
|---|
| Battery Type | Headphone battery rechargeable - lithium | - | |
|---|---|---|---|
| Battery Life | 30 hour(s) | - | |
| Battery Life Details | Continuous playback (noise cancelling ON / cable connection): up to 30 hours Continuous playback (noise cancelling ON / Bluetooth): up to 20 hours |
- | |
| Charging Time | 3 hour(s) | - |
| CONNECTIONS | Sennheiser PXC 550-II | Poly Blackwire 3320-M |
|---|
| Connector Type | Headphones (mini-phone stereo 3.5 mm) USB (micro-USB) |
USB (24 pin USB-C) |
|---|
| OTHERS | Sennheiser PXC 550-II | Poly Blackwire 3320-M |
|---|
| Included Accessories | Carrying case, airplane adapter | - | |
|---|---|---|---|
| Compatibility | - | Mac, Windows | |
| Software Certification | - | Certified for Microsoft Teams | |
| Supported Host Device OS | - | Windows 10, macOS | |
| Compliant Standards | MFI | - | |
| Service & Support | Limited warranty - 2 years | - |
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