Side by side comparison and review of JVC HA FX21BT and Devialet Gemini. 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 | JVC HA FX21BT | Devialet Gemini |
|---|
| Product Type | Earphones - Bluetooth - wireless | True wireless earphones - Bluetooth - wireless | |
|---|---|---|---|
| Weight | 11 g | - | |
| Dimensions & Weight Details | - | Charging case: 5.8 cm x 7.4 cm x 3.1 cm / 76 g Earbud: 1.8 cm x 3.3 cm x 1.5 cm / 8 g |
|
| Colour | Black | White | Matte black | |
| Protection | Splashproof, sweat-resistant | Splashproof, IPX4, dust-proof | |
| Recommended Use | - | Portable electronics |
| SOUND QUALITY | JVC HA FX21BT | Devialet Gemini |
|---|
| Headphones Form Factor | In-ear | In-ear | |
|---|---|---|---|
| Connectivity Technology | Wireless | Wireless | |
| Wireless Technology | Bluetooth | Bluetooth | |
| Bluetooth Version | Bluetooth 4.1 | Bluetooth 5.0 | Devialet Gemini have a more advanced version of Bluetooth than JVC HA FX21BT. |
| Bluetooth Profiles | Hands-Free Profile (HFP), Headset Profile (HSP), Advanced Audio Distribution Profile (A2DP), Audio/Video Remote Control Profile (AVRCP) | - | |
| Bluetooth Audio Codec | SBC | aptX | |
| Active Noise Cancelling | - | Yes | Devialet Gemini are equipped with active noice cancellation. |
| Active Noise Cancelling Technology | - | Internal Delay Compensation technology | |
| Sound Output Mode | - | Stereo | |
| Frequency Response | 20 - 20000 Hz | 5 - 20000 Hz | Devialet Gemini offer a larger frequency range than JVC HA FX21BT. |
| Total Harmonic Distortion (THD) | - | <0.1% | |
| Diaphragm | 8.2 mm | 10 mm | Devialet Gemini have a thicker diaphragm than JVC HA FX21BT. |
| Magnet Material | Neodymium | - | |
| Features | - | Ear Active Matching, Pressure Balance Architecture | |
| In-Cord Volume Control | Yes | - |
| MICROPHONE | JVC HA FX21BT | Devialet Gemini |
|---|
| Form Factor | - | Built-in | |
|---|---|---|---|
| Type | On-cable | - |
| REMOTE CONTROL | JVC HA FX21BT | Devialet Gemini |
|---|
| Controls | Power on/off, volume control, 3-button remote | Play/pause, voice assistant, ANC/ambient |
|---|
| CABLE | JVC HA FX21BT | Devialet Gemini |
|---|
| Cable Type | USB charge cable | Charging cable - detachable |
|---|
| FEATURES | JVC HA FX21BT | Devialet Gemini |
|---|
| Features | - | Touch control | |
|---|---|---|---|
| Intelligent Assistant | - | Siri, Google Assistant |
| BATTERY AND CHARGING | JVC HA FX21BT | Devialet Gemini |
|---|
| Battery Type | Headphone battery rechargeable | Headphone battery rechargeable | |
|---|---|---|---|
| Battery Life | 5 hour(s) | 6 hour(s) | Devialet Gemini lasts longer on a single charge than the JVC HA FX21BT. |
| Battery Life Details | - | Continuous playback (noise cancelling ON): up to 6 hours Continuous talk: up to 4 hours Continuous talk (noise cancelling OFF): up to 4.5 hours Continuous playback (with included charging case): up to 24 hours |
|
| Charging Time | 2.5 hour(s) | 1.5 hour(s) | Devialet Gemini recharge faster than JVC HA FX21BT. |
| CONNECTIONS | JVC HA FX21BT | Devialet Gemini |
|---|
| Connector Type | USB (power only) | - |
|---|
| OTHERS | JVC HA FX21BT | Devialet Gemini |
|---|
| Included Accessories | 2 pairs of low rebound earpieces (small, medium) | Charging case, charging cable, 4 pairs of ear tips (XS, small, medium, large) | |
|---|---|---|---|
| Compliant Standards | - | IPX4 |
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