Side by side comparison and review of Koss UR 23i and JBL Under Armour Sport Wireless Train. 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 | Koss UR 23i | JBL Under Armour Sport Wireless Train |
|---|
| Product Type | Headphones - wired - 3.5 mm jack | Headphones - Bluetooth - wireless | |
|---|---|---|---|
| Weight | - | 240 g | |
| Colour | White | Black | Black / red | Black | |
| Protection | - | Moisture-resistant, sweat-resistant, IPX4 | |
| Design | - | Sports | |
| Recommended Use | Portable electronics | Portable electronics |
| SOUND QUALITY | Koss UR 23i | JBL Under Armour Sport Wireless Train |
|---|
| Headphones Form Factor | Full size | On-ear | |
|---|---|---|---|
| Headphones Technology | - | Dynamic | |
| Foldable | - | Yes | JBL Under Armour Sport Wireless Train can be folded. |
| Connectivity Technology | Wired | Wireless | |
| Wireless Technology | - | Bluetooth | |
| Bluetooth Version | - | Bluetooth 4.1 | |
| Bluetooth Profiles | - | Hands-Free Profile (HFP), Headset Profile (HSP), Advanced Audio Distribution Profile (A2DP), Audio/Video Remote Control Profile (AVRCP) | |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 20 - 20000 Hz | 16 - 20000 Hz | JBL Under Armour Sport Wireless Train offer a larger frequency range than Koss UR 23i. |
| Max Input Power | - | 20 mW | |
| Sensitivity | 94 dB | 101 dB | JBL Under Armour Sport Wireless Train have higher sensitivity than Koss UR 23i. |
| Impedance | 34 Ohm | 32 Ohm | |
| Diaphragm | - | 40 mm | |
| Features | - | TalkThru technology, JBL Charged Sound, Ambient Aware |
| MICROPHONE | Koss UR 23i | JBL Under Armour Sport Wireless Train |
|---|
| Form Factor | - | Built-in | |
|---|---|---|---|
| Type | On-cable | - |
| REMOTE CONTROL | Koss UR 23i | JBL Under Armour Sport Wireless Train |
|---|
| Controls | - | Volume, power on/off, answer/end, play/pause, next/previous track, reject call, voice assistant, TalkThru button |
|---|
| CABLE | Koss UR 23i | JBL Under Armour Sport Wireless Train |
|---|
| Cable Type | Headphones cable - 1.22 m | Audio cable - detachable - 1.25 m |
|---|
| FEATURES | Koss UR 23i | JBL Under Armour Sport Wireless Train |
|---|
| Intelligent Assistant | - | Siri, Google Now |
|---|
| BATTERY AND CHARGING | Koss UR 23i | JBL Under Armour Sport Wireless Train |
|---|
| Battery Type | - | Headphone battery rechargeable - Lithium Ion | |
|---|---|---|---|
| Battery Capacity | - | 610 mAh | |
| Battery Life | - | 16 hour(s) | |
| Charging Time | - | 2 hour(s) |
| WIRELESS LINK | Koss UR 23i | JBL Under Armour Sport Wireless Train |
|---|
| Modulation Type | - | GFSK, 8-DPSK, DQPSK | |
|---|---|---|---|
| Radio Frequency Range | - | 2.402 - 2.480GHz |
| CONNECTIONS | Koss UR 23i | JBL Under Armour Sport Wireless Train |
|---|
| Connector Type | Headphones (mini-phone stereo 3.5 mm 4-pole) | Headphones (mini-phone stereo 3.5 mm) |
|---|
| OTHERS | Koss UR 23i | JBL Under Armour Sport Wireless Train |
|---|
| Included Accessories | - | Carrying case, micro-USB charging cable | |
|---|---|---|---|
| Compliant Standards | - | IPX4 | |
| Service & Support | Limited warranty - lifetime | Limited warranty - 1 year |
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