Side by side comparison and review of Sennheiser CX 400BT and OPPO Enco Air 2 Pro. 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 CX 400BT | OPPO Enco Air 2 Pro |
|---|
| Product Type | True wireless earphones - Bluetooth - wireless | True wireless earphones - Bluetooth - wireless | |
|---|---|---|---|
| Dimensions & Weight Details | Earbud: 6 g Charging case: 37 g |
Earphone: 4.3 g Charging case: 6.684 cm x 2.504 cm x 5.145 cm / 41.8 g Charging case with earphones: 50.4 g |
|
| Colour | White | Black | White | |
| Protection | - | Dust-resistant, IP54, water-resistant | |
| Recommended Use | Portable electronics | Portable electronics | |
| Bluetooth Range (Operating Distance) | - | 10 m |
| SOUND QUALITY | Sennheiser CX 400BT | OPPO Enco Air 2 Pro |
|---|
| Headphones Form Factor | In-ear | In-ear | |
|---|---|---|---|
| Headphones Technology | Dynamic | - | |
| Connectivity Technology | Wireless | Wireless | |
| Wireless Technology | Bluetooth | Bluetooth | |
| Bluetooth Version | Bluetooth 5.1 | Bluetooth 5.2 | OPPO Enco Air 2 Pro 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) | - | |
| Bluetooth Audio Codec | SBC, AAC, aptX | SBC, AAC | |
| Active Noise Cancelling | - | Yes | OPPO Enco Air 2 Pro are equipped with active noice cancellation. |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 5 - 21000 Hz | 20 - 20000 Hz | Sennheiser CX 400BT offer a larger frequency range than OPPO Enco Air 2 Pro. |
| Total Harmonic Distortion (THD) | 0.08% | - | |
| Sensitivity | - | 110.5 dB +/- 3dB | |
| Max Sound Pressure | 107 dB | - | |
| Diaphragm | 7 mm | Titanium composite - 12.4 mm | OPPO Enco Air 2 Pro have a thicker diaphragm than Sennheiser CX 400BT. |
| MICROPHONE | Sennheiser CX 400BT | OPPO Enco Air 2 Pro |
|---|
| Form Factor | Built-in | Built-in | |
|---|---|---|---|
| Noise Cancelling | - | Yes | OPPO Enco Air 2 Pro microphone can cancel out ambient noise. |
| Noise Cancelling Technology | - | Environmental Noise Cancellation (ENC) | |
| Sensitivity | - | -38 dBV/Pascal | |
| Microphones Included | - | 2 |
| REMOTE CONTROL | Sennheiser CX 400BT | OPPO Enco Air 2 Pro |
|---|
| Controls | Volume control, answer/end, play/pause, next/previous track, reject call, pair mode, voice assistant, equaliser preset | - |
|---|
| CABLE | Sennheiser CX 400BT | OPPO Enco Air 2 Pro |
|---|
| Cable Type | USB-C to USB-A cable - detachable - straight - 25 cm | - |
|---|
| FEATURES | Sennheiser CX 400BT | OPPO Enco Air 2 Pro |
|---|
| Features | Voice alerts, touch control | Touch control, noise reduction | |
|---|---|---|---|
| Intelligent Assistant | Siri, Google Assistant | - | |
| Additional Functions | - | Transparency mode |
| BATTERY AND CHARGING | Sennheiser CX 400BT | OPPO Enco Air 2 Pro |
|---|
| Battery Type | Headphone battery rechargeable - Lithium Ion | 2 x headphone battery rechargeable - Lithium Ion | |
|---|---|---|---|
| Battery Capacity | 55 mAh | 43 mAh | Sennheiser CX 400BT have a higher battery capacity than OPPO Enco Air 2 Pro. |
| Battery Life | 7 hour(s) | - | |
| Battery Life Details | Continuous playback (50% volume): up to 7 hours Continuous playback (with included charging case): up to 20 hours |
Continuous playback (noise cancelling OFF): up to 7 hours Continuous playback (noise cancelling OFF / with included charging case): up to 28 hours Continuous playback (noise cancelling ON): up to 5 hours Continuous playback (noise cancelling ON / with included charging case): up to 20 hours |
|
| Charging Time | 1.5 hour(s) | 90 min | The charging of both headphones last the same time. |
| Included Qty | 2 | 2 |
| WIRELESS LINK | Sennheiser CX 400BT | OPPO Enco Air 2 Pro |
|---|
| Radio Transmitter Power | 10 mW | - |
|---|
| OTHERS | Sennheiser CX 400BT | OPPO Enco Air 2 Pro |
|---|
| Included Accessories | 4 pairs of earpads (extra small, small, medium, large), charging case (420 mAh) | Charging case (440 mAh) | |
|---|---|---|---|
| Compliant Standards | Bluetooth Class 1, Directive 2006/66/EC, WEEE 2012/19/EU, Directive 2013/56/EU | IP54 | |
| Service & Support | - | Limited warranty - 1 year |
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