Side by side comparison and review of Erato Apollo 7S and Sennheiser CX 400BT. 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 | Erato Apollo 7S | Sennheiser CX 400BT |
|---|
| Product Type | True wireless earphones - Bluetooth - wireless | True wireless earphones - Bluetooth - wireless | |
|---|---|---|---|
| Width | 1.54 cm | - | |
| Depth | 2.22 cm | - | |
| Weight | 4 g | - | |
| Dimensions & Weight Details | Charging case: 6.25 cm x 4 cm x 2.55 cm / 52 g | Earbud: 6 g Charging case: 37 g |
|
| Colour | Black | Space grey | Rose gold | Silver | White | Black | |
| Protection | Weatherproof, sweat-resistant, IPX5 | - | |
| Recommended Use | Portable electronics | Portable electronics | |
| Bluetooth Range (Operating Distance) | 10 m | - |
| SOUND QUALITY | Erato Apollo 7S | Sennheiser CX 400BT |
|---|
| Headphones Form Factor | In-ear | In-ear | |
|---|---|---|---|
| Headphones Technology | - | Dynamic | |
| Connectivity Technology | Wireless | Wireless | |
| Wireless Technology | Bluetooth | Bluetooth | |
| Bluetooth Version | Bluetooth 4.1 | Bluetooth 5.1 | Sennheiser CX 400BT have a more advanced version of Bluetooth than Erato Apollo 7S. |
| Bluetooth Profiles | Hands-Free Profile (HFP), Headset Profile (HSP), 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 | |
| Sound Effects | 3D Surround Sound | - | |
| Frequency Response | 20 - 20000 Hz | 5 - 21000 Hz | Sennheiser CX 400BT offer a larger frequency range than Erato Apollo 7S. |
| Total Harmonic Distortion (THD) | - | 0.08% | |
| Sensitivity | 100 dB | - | |
| Impedance | 16 Ohm | - | |
| Max Sound Pressure | - | 107 dB | |
| Diaphragm | 5.8 mm | 7 mm | Sennheiser CX 400BT have a thicker diaphragm than Erato Apollo 7S. |
| Features | Bluetooth aptX technology | - |
| MICROPHONE | Erato Apollo 7S | Sennheiser CX 400BT |
|---|
| Form Factor | Built-in | Built-in | |
|---|---|---|---|
| Microphone Operation Mode | Omni-directional | - | |
| Sensitivity | -42 dB | - |
| REMOTE CONTROL | Erato Apollo 7S | Sennheiser CX 400BT |
|---|
| Controls | Volume, answer/end, play/pause, next/previous track | Volume control, answer/end, play/pause, next/previous track, reject call, pair mode, voice assistant, equaliser preset |
|---|
| CABLE | Erato Apollo 7S | Sennheiser CX 400BT |
|---|
| Cable Type | USB charge cable | USB-C to USB-A cable - detachable - straight - 25 cm |
|---|
| FEATURES | Erato Apollo 7S | Sennheiser CX 400BT |
|---|
| Features | - | Voice alerts, touch control | |
|---|---|---|---|
| Intelligent Assistant | - | Siri, Google Assistant |
| BATTERY AND CHARGING | Erato Apollo 7S | Sennheiser CX 400BT |
|---|
| Battery Type | Headphone battery rechargeable | Headphone battery rechargeable - Lithium Ion | |
|---|---|---|---|
| Battery Capacity | - | 55 mAh | |
| Battery Life | 4 hours | 7 hour(s) | Sennheiser CX 400BT lasts longer on a single charge than the Erato Apollo 7S. |
| Battery Life Details | Continuous talk: up to 4 hours Continuous playback: up to 3 hours |
Continuous playback (50% volume): up to 7 hours Continuous playback (with included charging case): up to 20 hours |
|
| Charging Time | - | 1.5 hour(s) | |
| Included Qty | - | 2 |
| WIRELESS LINK | Erato Apollo 7S | Sennheiser CX 400BT |
|---|
| Radio Transmitter Power | - | 10 mW |
|---|
| OTHERS | Erato Apollo 7S | Sennheiser CX 400BT |
|---|
| Included Accessories | 3 pairs of Comply foam ear tips, charging case, 3 pairs of ear stabilisers (small, medium, large) | 4 pairs of earpads (extra small, small, medium, large), charging case (420 mAh) | |
|---|---|---|---|
| Compliant Standards | - | Bluetooth Class 1, Directive 2006/66/EC, WEEE 2012/19/EU, Directive 2013/56/EU |
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