In depth comparison and review of Erato RIO 3 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 | Erato RIO 3 | Sennheiser CX True Wireless |
|---|
| Product Type | True wireless earphones - Bluetooth - wireless | True wireless earphones - Bluetooth - wireless | |
|---|---|---|---|
| Height | 4.6 cm | - | |
| Width | 5.1 cm | - | |
| Depth | 3.4 cm | - | |
| Weight | 14 g | - | |
| Dimensions & Weight Details | - | Earbud: 6 g Charging case: 5.9 cm x 4.23 cm x 3.38 cm / 37 g |
|
| Colour | Yellow | Black | Turquoise | Green | Red | Silver | Black | White | |
| Protection | Sweat-resistant, IPX5, water-resistant | Splashproof, IPX4 | |
| Recommended Use | Portable electronics | Portable electronics | |
| Bluetooth Range (Operating Distance) | 10 m | - |
| SOUND QUALITY | Erato RIO 3 | Sennheiser CX True Wireless |
|---|
| Headphones Form Factor | In-ear | In-ear | |
|---|---|---|---|
| Headphones Technology | - | Dynamic | |
| Ear Cups Type | - | Closed | |
| Connectivity Technology | Wireless | Wireless | |
| Wireless Technology | Bluetooth | Bluetooth | |
| Bluetooth Version | Bluetooth 4.2 | Bluetooth 5.2 | Sennheiser CX True Wireless have a more advanced version of Bluetooth than Erato RIO 3. |
| 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 | 20 - 20000 Hz | 5 - 21000 Hz | Sennheiser CX True Wireless offer a larger frequency range than Erato RIO 3. |
| Total Harmonic Distortion (THD) | - | <0.08% | |
| Sensitivity | 100 dB | 110 dB | Sennheiser CX True Wireless have higher sensitivity than Erato RIO 3. |
| Impedance | 32 Ohm | 16 Ohm | |
| Max Sound Pressure | - | 110 dB | |
| Diaphragm | 14.2 mm | 7 mm | Erato RIO 3 have a thicker diaphragm than Sennheiser CX True Wireless. |
| Simultaneously Connectable Devices Qty (Multipoint) | - | 1 | |
| Features | - | TrueResponse technology |
| MICROPHONE | Erato RIO 3 | Sennheiser CX True Wireless |
|---|
| Form Factor | Built-in | Built-in | |
|---|---|---|---|
| Microphone Operation Mode | Omni-directional | - | |
| Frequency Response | - | 100 - 10000 Hz | |
| Sensitivity | -38 dB | - | |
| Microphones Included | - | 4 |
| REMOTE CONTROL | Erato RIO 3 | Sennheiser CX True Wireless |
|---|
| Controls | Volume, power on/off, answer/end, play/pause, next/previous track, pair mode | - |
|---|
| CABLE | Erato RIO 3 | Sennheiser CX True Wireless |
|---|
| Cable Type | - | USB-C charge cable - detachable - 25 cm |
|---|
| FEATURES | Erato RIO 3 | Sennheiser CX True Wireless |
|---|
| Features | - | Touch control | |
|---|---|---|---|
| Internet of Things (IoT) Compatible | - | Yes | |
| Voice Control | - | Indirect | |
| Intelligent Assistant | - | Siri, Google Assistant |
| BATTERY AND CHARGING | Erato RIO 3 | Sennheiser CX True Wireless |
|---|
| Battery Type | Headphone battery rechargeable | Headphone battery rechargeable - Lithium Ion | |
|---|---|---|---|
| Battery Capacity | 130 mAh | 60 mAh | Erato RIO 3 have a higher battery capacity than Sennheiser CX True Wireless. |
| Battery Life | 8 hour(s) | 9 hour(s) | Sennheiser CX True Wireless lasts longer on a single charge than the Erato RIO 3. |
| Battery Life Details | Continuous playback: up to 6 hours Continuous talk: up to 8 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) | |
| Included Qty | 2 | 2 |
| OTHERS | Erato RIO 3 | Sennheiser CX True Wireless |
|---|
| Included Accessories | - | 4 pairs of earpads (extra small, small, medium, large), charging case (400 mAh) | |
|---|---|---|---|
| Compliant Standards | - | Bluetooth Class 1 |
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