In depth comparison and review of JBL Under Armour True Wireless Flash and Sennheiser CX 400BT. Compare design, audio features, functions and other important specifications to easily choose the right headphones for you. Our goal is to help you uncover differences between the products and find the headphones that will best fit your needs.
| DESIGN AND DIMENSIONS | JBL Under Armour True Wireless Flash | Sennheiser CX 400BT |
|---|
| Product Type | True wireless earphones - Bluetooth - wireless | True wireless earphones - Bluetooth - wireless | |
|---|---|---|---|
| Weight | 16 g | - | |
| Dimensions & Weight Details | - | Earbud: 6 g Charging case: 37 g |
|
| Colour | Black | White | Black | |
| Protection | Waterproof, sweat-resistant, IPX7 | - | |
| Design | Sports | - | |
| Recommended Use | Portable electronics | Portable electronics |
| SOUND QUALITY | JBL Under Armour True Wireless Flash | Sennheiser CX 400BT |
|---|
| Headphones Form Factor | In-ear | In-ear | |
|---|---|---|---|
| Headphones Technology | - | Dynamic | |
| Connectivity Technology | Wireless | Wireless | |
| Wireless Technology | Bluetooth | Bluetooth | |
| Bluetooth Version | Bluetooth 4.2 | Bluetooth 5.1 | Sennheiser CX 400BT have a more advanced version of Bluetooth than JBL Under Armour True Wireless Flash. |
| Bluetooth Profiles | Hands-Free Profile (HFP), Advanced Audio Distribution Profile (A2DP), Audio/Video Remote Control Profile (AVRCP) | Hands-Free Profile (HFP), Headset Profile (HSP), Advanced Audio Distribution Profile (A2DP), Audio/Video Remote Control Profile (AVRCP) | |
| Bluetooth Audio Codec | - | SBC, AAC, aptX | |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 20 - 22000 Hz | 5 - 21000 Hz | JBL Under Armour True Wireless Flash offer a larger frequency range than Sennheiser CX 400BT. |
| Total Harmonic Distortion (THD) | - | 0.08% | |
| Sensitivity | 95 dB | - | |
| Impedance | 14 Ohm | - | |
| Max Sound Pressure | 113 dB | 107 dB | |
| Diaphragm | 5.8 mm | 7 mm | Sennheiser CX 400BT have a thicker diaphragm than JBL Under Armour True Wireless Flash. |
| Features | TalkThru technology, JBL Charged Sound, Ambient Aware | - |
| MICROPHONE | JBL Under Armour True Wireless Flash | Sennheiser CX 400BT |
|---|
| Form Factor | Built-in | Built-in | |
|---|---|---|---|
| Sensitivity | -25 dBV/Pascal | - |
| REMOTE CONTROL | JBL Under Armour True Wireless Flash | Sennheiser CX 400BT |
|---|
| Controls | Power on/off, answer/end, microphone on/mute, play/pause, next/previous track, reject call, voice assistant, TalkThru button | Volume control, answer/end, play/pause, next/previous track, reject call, pair mode, voice assistant, equaliser preset |
|---|
| CABLE | JBL Under Armour True Wireless Flash | Sennheiser CX 400BT |
|---|
| Cable Type | - | USB-C to USB-A cable - detachable - straight - 25 cm |
|---|
| FEATURES | JBL Under Armour True Wireless Flash | Sennheiser CX 400BT |
|---|
| Features | True wireless | Voice alerts, touch control | |
|---|---|---|---|
| Intelligent Assistant | Siri, Google Now | Siri, Google Assistant |
| BATTERY AND CHARGING | JBL Under Armour True Wireless Flash | Sennheiser CX 400BT |
|---|
| Battery Type | 2 x headphone battery rechargeable - lithium polymer | Headphone battery rechargeable - Lithium Ion | |
|---|---|---|---|
| Battery Capacity | 85 mAh | 55 mAh | JBL Under Armour True Wireless Flash have a higher battery capacity than Sennheiser CX 400BT. |
| Battery Life | 5 hour(s) | 7 hour(s) | Sennheiser CX 400BT lasts longer on a single charge than the JBL Under Armour True Wireless Flash. |
| Battery Life Details | - | Continuous playback (50% volume): up to 7 hours Continuous playback (with included charging case): up to 20 hours |
|
| Charging Time | 2 hour(s) | 1.5 hour(s) | Sennheiser CX 400BT recharge faster than JBL Under Armour True Wireless Flash. |
| Included Qty | 2 | 2 |
| WIRELESS LINK | JBL Under Armour True Wireless Flash | Sennheiser CX 400BT |
|---|
| Radio Transmitter Power | - | 10 mW |
|---|
| OTHERS | JBL Under Armour True Wireless Flash | Sennheiser CX 400BT |
|---|
| Included Accessories | 3 pairs of ear tips (small, medium, large), micro-USB charging cable, 3 pairs of wing tips (small, medium, large), charging case (1500 mAh) | 4 pairs of earpads (extra small, small, medium, large), charging case (420 mAh) | |
|---|---|---|---|
| Software Included | MapMyRun premium membership (12 months) | - | |
| Compliant Standards | IPX7 | Bluetooth Class 1, Directive 2006/66/EC, WEEE 2012/19/EU, Directive 2013/56/EU | |
| Service & Support | Limited warranty - 1 year | - |
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