In depth comparison and review of Sennheiser CX 400BT and Sennheiser CX True Wireless. 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 | Sennheiser CX 400BT | Sennheiser CX True Wireless |
|---|
| Product Type | True wireless earphones - Bluetooth - wireless | True wireless earphones - Bluetooth - wireless | |
|---|---|---|---|
| Dimensions & Weight Details | Earbud: 6 g Charging case: 37 g |
Earbud: 6 g Charging case: 5.9 cm x 4.23 cm x 3.38 cm / 37 g |
|
| Colour | White | Black | Black | White | |
| Protection | - | Splashproof, IPX4 | |
| Recommended Use | Portable electronics | Portable electronics |
| SOUND QUALITY | Sennheiser CX 400BT | Sennheiser CX True Wireless |
|---|
| Headphones Form Factor | In-ear | In-ear | |
|---|---|---|---|
| Headphones Technology | Dynamic | Dynamic | |
| Ear Cups Type | - | Closed | |
| Connectivity Technology | Wireless | Wireless | |
| Wireless Technology | Bluetooth | Bluetooth | |
| Bluetooth Version | Bluetooth 5.1 | Bluetooth 5.2 | Sennheiser CX True Wireless have a more advanced version of Bluetooth than Sennheiser CX 400BT. |
| Bluetooth Profiles | Hands-Free Profile (HFP), Headset Profile (HSP), Advanced Audio Distribution Profile (A2DP), Audio/Video Remote Control Profile (AVRCP) | Hands-Free Profile (HFP), Advanced Audio Distribution Profile (A2DP), Audio/Video Remote Control Profile (AVRCP) | |
| Bluetooth Audio Codec | SBC, AAC, aptX | SBC, AAC, aptX | |
| Noise Isolating | - | Yes | Sennheiser CX True Wireless are equipped with a noise isolating function. |
| Sound Output Mode | Stereo | Stereo | |
| Sound Effects | - | Bass Boost | |
| Frequency Response | 5 - 21000 Hz | 5 - 21000 Hz | Both headphones offer the same frequency response. |
| Total Harmonic Distortion (THD) | 0.08% | <0.08% | Both headphones have the same total harmonic distortion. |
| Sensitivity | - | 110 dB | |
| Impedance | - | 16 Ohm | |
| Max Sound Pressure | 107 dB | 110 dB | |
| Diaphragm | 7 mm | 7 mm | Both headphones are designed with same thick diaphragm. |
| Simultaneously Connectable Devices Qty (Multipoint) | - | 1 | |
| Features | - | TrueResponse technology |
| MICROPHONE | Sennheiser CX 400BT | Sennheiser CX True Wireless |
|---|
| Form Factor | Built-in | Built-in | |
|---|---|---|---|
| Frequency Response | - | 100 - 10000 Hz | |
| Microphones Included | - | 4 |
| REMOTE CONTROL | Sennheiser CX 400BT | Sennheiser CX True Wireless |
|---|
| Controls | Volume control, answer/end, play/pause, next/previous track, reject call, pair mode, voice assistant, equaliser preset | - |
|---|
| CABLE | Sennheiser CX 400BT | Sennheiser CX True Wireless |
|---|
| Cable Type | USB-C to USB-A cable - detachable - straight - 25 cm | USB-C charge cable - detachable - 25 cm |
|---|
| FEATURES | Sennheiser CX 400BT | Sennheiser CX True Wireless |
|---|
| Features | Voice alerts, touch control | Touch control | |
|---|---|---|---|
| Internet of Things (IoT) Compatible | - | Yes | |
| Voice Control | - | Indirect | |
| Intelligent Assistant | Siri, Google Assistant | Siri, Google Assistant |
| BATTERY AND CHARGING | Sennheiser CX 400BT | Sennheiser CX True Wireless |
|---|
| Battery Type | Headphone battery rechargeable - Lithium Ion | Headphone battery rechargeable - Lithium Ion | |
|---|---|---|---|
| Battery Capacity | 55 mAh | 60 mAh | Sennheiser CX True Wireless have a higher battery capacity than Sennheiser CX 400BT. |
| Battery Life | 7 hour(s) | 9 hour(s) | Sennheiser CX True Wireless lasts longer on a single charge than the Sennheiser CX 400BT. |
| Battery Life Details | Continuous playback (50% volume): up to 7 hours Continuous playback (with included charging case): up to 20 hours |
Continuous playback (50% volume): up to 9 hours Continuous playback (with included charging case): up to 27 hours |
|
| Charging Time | 1.5 hour(s) | 1.5 hour(s) | The charging of both headphones last the same time. |
| Included Qty | 2 | 2 |
| WIRELESS LINK | Sennheiser CX 400BT | Sennheiser CX True Wireless |
|---|
| Radio Transmitter Power | 10 mW | - |
|---|
| OTHERS | Sennheiser CX 400BT | Sennheiser CX True Wireless |
|---|
| Included Accessories | 4 pairs of earpads (extra small, small, medium, large), charging case (420 mAh) | 4 pairs of earpads (extra small, small, medium, large), charging case (400 mAh) | |
|---|---|---|---|
| Compliant Standards | Bluetooth Class 1, Directive 2006/66/EC, WEEE 2012/19/EU, Directive 2013/56/EU | Bluetooth Class 1 |
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