Side by side comparison and review of Poly Blackwire 325 and JBL TUNE 670NC. 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 | JBL TUNE 670NC |
|---|
| Product Type | Headset - wired - USB, 3.5 mm jack | Headphones - Bluetooth - wireless, wired - 3.5 mm jack | |
|---|---|---|---|
| Series | 300 Series | - | |
| Weight | - | 220 g | |
| Colour | - | Black | Blue | White | Purple | |
| Headband Material | Metal | - | |
| Recommended Use | - | Portable electronics |
| SOUND QUALITY | Poly Blackwire 325 | JBL TUNE 670NC |
|---|
| Headphones Form Factor | On-ear | Over ear | |
|---|---|---|---|
| Headphones Technology | - | Dynamic | |
| Adjustable Headband | - | Yes | |
| Foldable | - | Yes | JBL TUNE 670NC can be folded. |
| Connectivity Technology | Wired | Wireless, wired | |
| Wireless Technology | - | Bluetooth | |
| Bluetooth Version | - | Bluetooth 5.0 | |
| Bluetooth Profiles | - | Hands-Free Profile (HFP), Advanced Audio Distribution Profile (A2DP), Audio/Video Remote Control Profile (AVRCP) | |
| Active Noise Cancelling | - | Yes | JBL TUNE 670NC are equipped with active noice cancellation. |
| Sound Output Mode | Stereo | Stereo | |
| Sound Effects | - | Pure Bass | |
| Frequency Response | 20 - 20000 Hz | 20 - 20000 Hz | Both headphones offer the same frequency response. |
| Sensitivity | - | 103 dB | |
| Impedance | - | 32 Ohm | |
| Max Sound Pressure | - | 95 dB | |
| Diaphragm | - | 40 mm | |
| Features | SoundGuard Technology | Google Fast Pair | |
| In-Cord Volume Control | Yes | - |
| MICROPHONE | Poly Blackwire 325 | JBL TUNE 670NC |
|---|
| Form Factor | - | Built-in | |
|---|---|---|---|
| Type | Boom | - | |
| Frequency Response | 100 - 10000 Hz | - | |
| Sensitivity | - | -30 dBV/Pascal |
| REMOTE CONTROL | Poly Blackwire 325 | JBL TUNE 670NC |
|---|
| Controls | Mute, volume, answer/end | Volume, power on/off, play/pause, skip track, pair mode, voice assistant, ANC on/off, track forward, call |
|---|
| CABLE | Poly Blackwire 325 | JBL TUNE 670NC |
|---|
| Cable Type | Headset cable - 2.13 m | Audio cable - detachable - 1.2 m USB-C charge cable - detachable |
|
|---|---|---|---|
| Cable Length | 2.13 m | - |
| FEATURES | Poly Blackwire 325 | JBL TUNE 670NC |
|---|
| Features | - | Multipoint Pairing | |
|---|---|---|---|
| Voice Control | - | Indirect | |
| Additional Functions | DSP | - |
| BATTERY AND CHARGING | Poly Blackwire 325 | JBL TUNE 670NC |
|---|
| Battery Type | - | Headphone battery rechargeable - lithium polymer | |
|---|---|---|---|
| Battery Capacity | - | 610 mAh | |
| Battery Life | - | 50 hour(s) | |
| Battery Life Details | - | Continuous playback (noise cancelling ON / Bluetooth): up to 35 hours Continuous playback (noise cancelling OFF / Bluetooth): up to 50 hours |
|
| Charging Time | - | 2 hour(s) |
| WIRELESS LINK | Poly Blackwire 325 | JBL TUNE 670NC |
|---|
| Modulation Type | - | GFSK, 8-DPSK, 4-DQPSK | |
|---|---|---|---|
| Radio Frequency Range | - | 2.4 - 2.4835GHz |
| CONNECTIONS | Poly Blackwire 325 | JBL TUNE 670NC |
|---|
| Connector Type | USB (4 PIN USB Type A) Headphones (mini-phone 3.5 mm 4-pole) |
USB-C (power only) (24 pin USB-C) Audio input / output (mini-phone 3.5mm) |
|---|
| OTHERS | Poly Blackwire 325 | JBL TUNE 670NC |
|---|
| Compliant Standards | - | ANATEL, EAC | |
|---|---|---|---|
| Service & Support | Limited warranty - 2 years | Limited warranty - 1 year |
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