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We've recently released our Test Bench 1.7 update for Headphones! Read the Noise isolation R&D Article to learn more.

Devialet Gemini II True Wireless Headphones Review

Tested using Methodology v1.7
Reviewed Nov 17, 2023 at 09:25 am
Latest change: Test bench update Jul 12, 2024 at 12:56 pm
Devialet Gemini II True Wireless Picture
7.5
Neutral Sound
8.4
Commute/Travel
8.4
Sports/Fitness
7.8
Office
5.9
Wireless Gaming
5.8
Wired Gaming
7.5
Phone Calls

The Devialet Gemini II True Wireless are premium noise cancelling buds. They're the successor of the Devialet Gemini I True Wireless, adding an active wind reduction feature to help reduce the impact of this noise on vocal quality and redesigning the carrying case. More updated features include Bluetooth 5.2 support, multi-device pairing, and fast-pair. You can even pick up these buds with 24-karat gold detailing; this edition is made in partnership with the Paris Opera, but as you may guess, all that extra bling increases their already high price point.

Our Verdict

7.5 Neutral Sound

The Devialet Gemini 2 are decent for neutral sound. They have a fairly neutral sound out of the box, although our left and right drivers display some mismatch in the bass and mid ranges. The effect is somewhat minor and may be unique to our unit. Still, mixes have adequate bass and warmth, while vocals and instruments are clear and natural. Since they're in-ear headphones, they don't create a very wide or spacious soundstage.

Pros
  • Graphic EQ and presets available in companion app.
Cons
  • Bad passive soundstage.
8.4 Commute/Travel

The Devialet Gemini 2 are great for commute and travel. These comfortable buds have an ANC system that's well-suited for blocking a low rumble of bus and plane engines. That said, with ANC on, they only last under five hours, which may not be enough to get you from point A to B without a recharge. Luckily, their carrying case holds over four extra charges if needed.

Pros
  • Outstanding noise isolation.
  • Comfortable and very stable in-ear fit.
Cons
  • Short continuous battery life.
8.4 Sports/Fitness

The Devialet Gemini 2 are great for sports and fitness. They have a comfortable and very stable fit, so they won't fall out of your ears during tough workouts. They also have an IPX4 rating, so they can survive direct water exposure like rain and have easy-to-use controls.

Pros
  • Outstanding noise isolation.
  • Comfortable and very stable in-ear fit.
Cons
  • Short continuous battery life.
7.8 Office

The Devialet Gemini II are very good for office use. They have a comfortable fit and support multi-device pairing, so you can connect them to your PC and smartphone simultaneously. They also have an ANC system, and while they can block out chatty coworkers, they reduce more sound from the mid-range onwards when the ANC is off than when on. They also lasted under five hours continuously, so you may need to pop them in your case throughout the day for a recharge.

Pros
  • Outstanding noise isolation.
  • Supports multi-device pairing.
Cons
  • Short continuous battery life.
5.9 Wireless Gaming

The Devialet Gemini 2 are Bluetooth earbuds, and their latency is too high for gaming on PCs since your audio and visuals will be out of sync. They also can't connect to most consoles.

5.8 Wired Gaming

The Devialet Gemini 2 are Bluetooth-only earbuds; you can't use them wired.

7.5 Phone Calls

The Devialet Gemini 2 are good for phone calls. While the integrated mic makes your voice sound a bit muffled, it does a very good job of separating speech from ambient noise, so your voice is clear, even in noisy places like a busy office. They also have an active wind reduction feature to help reduce some of this noise if you're talking in a windy area. The buds are equipped with an ANC system, and overall, they can cut down a lot of background noise, even though the buds can block out more sound in the mid to treble range when the ANC is off than when on.

Pros
  • Very good noise handling performance.
  • Outstanding noise isolation.
Cons
  • Short continuous battery life.
  • 7.5 Neutral Sound
  • 8.4 Commute/Travel
  • 8.4 Sports/Fitness
  • 7.8 Office
  • 5.9 Wireless Gaming
  • 5.8 Wired Gaming
  • 7.5 Phone Calls
  1. Updated Jul 12, 2024: We've converted this review to Test Bench 1.7, which updates our Noise Isolation test. We've also expanded the scope of this test to include Common Scenarios in addition to Voice Handling and Wind Handling.
  2. Updated Dec 20, 2023: We've retested Phase Mismatch in Imaging to better reflect real-life performance.
  3. Updated Nov 17, 2023: Review published.
  4. Updated Nov 13, 2023: Early access published.
  5. Updated Nov 07, 2023: Our testers have started testing this product.
  6. Updated Oct 11, 2023: The product has arrived in our lab, and our testers will start evaluating it soon.
  7. Updated Sep 28, 2023: We've purchased the product and are waiting for it to arrive in our lab.

Differences Between Sizes And Variants

The Devialet Gemini II come in three color variants: 'Iconic White', 'Matte Black', and 'Gold'. We tested the 'Iconic White' variant, and you can see our model's label here. It's worth mentioning that there's a price difference between the 'Iconic White' and 'Matte Black' variants versus the 'Gold'. The 'Gold' model is more expensive as it's a collaboration with the Paris Opera and has a 24-karat gold finish on the carrying case as well as on the buds.

If you come across another variant, please let us know in the forums, and we'll update our review.

Compared To Other Headphones

The Devialet Gemini 2 are the next generation of the Devialet Gemini True Wireless. Their design has a couple of improvements, including a different carrying case that looks and feels more like the Bowers & Wilkins Pi7 S2 True Wireless and an upgrade to Bluetooth 5.2, adding multi-device pairing and fast-pair. They also have an outstanding noise isolation performance, partly due to their ANC system. However, the buds passively block out more background noise in the mid to treble ranges than their ANC, which is disappointing. For their high price point, they also feel a bit barebones. Compared to the top-of-the-line Jabra Elite 10 True Wireless, they lack a spatial audio feature to help immerse you in your audio and don't support aptX Adaptive for improved sound quality via Bluetooth.

Check out our picks for the best earbuds and in-ear headphones, the best sounding wireless earbuds, and the best true wireless earbuds.

Apple AirPods Pro (2nd generation) Truly Wireless

The Devialet Gemini II True Wireless and the Apple AirPods Pro (2nd generation) Truly Wireless are both premium buds with different strengths. The Devialet have a companion app with a graphic EQ and presets and support multi-device pairing and aptX codec, which can help give you better sound quality over Bluetooth. Their ANC also does a better job of blocking out bass range noise, though the buds reduce more noise passively than the ANC from the mid-range onwards. The AirPods Pro have iOS-centric features like Spatial Audio for a more immersive sound and an H2 chip for seamless pairing with your iPhone or MacBook. They also have a better battery performance.

Bose QuietComfort Ultra Earbuds Truly Wireless

The Bose QuietComfort Ultra Earbuds Truly Wireless and the Devialet Gemini II True Wireless are both premium buds. The Bose are more comfortable, have a spatial audio feature to help give you a more immersive sound, and they have a better overall battery performance. They support aptX Adaptive too, which is a Bluetooth codec that dynamically adapts to your content, giving you either lower latency or better sound quality. However, the Devialet are better built, have a more neutral sound, which some users may prefer, and support multi-device pairing. While the Devialet have a better overall noise isolation performance, their ANC system performs worse than when the buds are off beyond the low-mid range. 

Bowers & Wilkins Pi7 S2 True Wireless

The Bowers & Wilkins Pi7 S2 True Wireless and the Devialet Gemini II True Wireless are both premium earbuds. While both buds are well-built, the Bowers & Wilkins are a bit unique as their carrying case doubles as a wireless transmitter so that you can connect the buds to things like in-flight entertainment. They also support aptX Adaptive, which is a codec that dynamically adjusts its performance based on the content you're listening to, so you get either lower latency or better sound quality. However, the Devialet are more comfortable and stable in-ear. They also have a more neutral sound profile, a longer continuous battery life, and a better overall noise isolation performance. Their companion app also offers a graphic EQ and presets so that you can adjust their sound.

Jabra Elite 10 True Wireless

The Jabra Elite 10 True Wireless and the Devialet Gemini II True Wireless have different strengths. While both buds are comfortable and well-built, the Jabra support a spatial sound feature that can make your audio more immersive-sounding, and their continuous battery life is better, too. However, the Devialet have a slightly more neutral sound, which some users may prefer; their noise isolation performance is better, and they support aptX codec for streaming higher quality audio than the default SBC codec. They are a lot more expensive than the Jabra, though.

Test Results

perceptual testing image
Design
Design
Style
Type In-ear
Enclosure Closed-Back
Wireless Truly Wireless
Transducer Dynamic

The Devialet Gemini 2 have an oval-shaped face with silver accents and the manufacturer's logo off to one side. They come in two color variants: 'Iconic White' and 'Matte Black'. They also come in a more premium 'Gold' model that's produced in collaboration with the Paris Opera. This variant is more expensive and has 24-karat detailing.

7.5
Design
Comfort
Weight 0.03 lbs
Clamping Force
0 lbs

These buds have a comfortable fit. To get the best fit, the buds need to sit in your ear at an angle, so you don't want to place them too vertically or horizontally. They have a deep in-ear fit that creates a plunger-like feeling when properly placed.

7.4
Design
Controls
OS Compatibility
Not OS specific
Ease Of Use Good
Feedback Mediocre
Call/Music Control Yes
Volume Control Yes
Microphone Control No
Channel Mixing
No
Noise Cancelling Control On/Off
Talk-Through
On/Off
Additional Controls No

These buds have a touch-sensitive surface on both buds, which is easy to spot. The controls are easy to activate with a light tap, and there's feedback for cycling between ANC and transparency mode, but everything else lacks feedback.

On either bud:

  • Single tap: Plays and pauses audio. Also answers calls.
  • Tap and hold: Cycles between ANC on and transparency mode.

On the left earbud:

  • Double tap: Skips a track forward. Also ends and declines calls.
  • Double tap and hold: Decreases the volume.

On the right earbud:

  • Double tap: Skips a track forward. Also ends and declines calls.
  • Double tap and hold: Raises the volume.

9.6
Design
Portability
L 1.1" (2.9 cm)
W 0.9" (2.4 cm)
H 0.8" (2.0 cm)
Volume 0.85 in³ (13.90 cm³)
Transmitter Required No

Like other in-ear headphones, these buds are very portable, making it easy to take them on the go.

8.0
Design
Case
Type Hard case
L 2.6" (6.5 cm)
W 1.1" (2.7 cm)
H 1.5" (3.9 cm)
Volume 4.18 in³ (68.45 cm³)

The carrying case is great. Devialet has redesigned the predecessor's case, which had a flat sliding top, to a more traditional top-down case with a lid that flips upward. Overall, it feels well-built, and the matte plastic feels good. It also supports wireless charging. There are magnets to hold the buds in place while the hinge is secure and snappy. That said, the chrome trim is plastic and doesn't feel premium. It's particularly prone to fingerprints.

8.0
Design
Build Quality

The build quality of these buds is great. They're mostly made of plastic, which feels sturdy and high-quality. They're certified IPX4 for resistance against rain, which is handy if you want to use them during outdoor workouts. The silicone ear tips can wear down over time if you don't take care of them.

8.0
Design
Stability

These buds have great stability. Even though they lack stability fins, they won't fall out of your ear, even during intense workouts.

Design
Headshots 1
Design
Headshots 2
Design
Top
Design
In The Box

  • Devialet Gemini II
  • 4x silicone ear tips
  • Charging case
  • USB-A to USB-C charging cable
  • Manual

Sound
Sound
Sound Profile
Bass Amount
1.73 dB
Treble Amount
-1 dB

The Devialet Gemini 2 have a fairly neutral sound profile with adequate bass and warmth. Vocals and instruments sound natural and present but a bit veiled. Luckily, you can fine-tune their sound to your liking using their companion app's graphic EQ and presets.

There are some notable deviations in their response. We measured a difference between the left and right drivers, particularly in the low-bass and mid-range. The right driver delivers more thump and rumble than the left driver, but the left driver is more flat and neutral in the mid driver than the left. We verified our test rig's left ear canal by swapping the earpiece out and using silicone epoxy to repair our rig. This helps us ensure a proper seal within the internal ear canal. We then verified our calibration against our original results and used the HiFiMan Arya to spot-check our consistency. Finally, we performed subjective listening to see if we could spot the deviation for ourselves: the deviation is there but not as dramatic as what our results show. You can also see driver deviation in the phase response. This deviation may be unique to our unit, but if you've noticed something similar with your own, please let us know in the forums.

9.0
Sound
Frequency Response Consistency
Avg. Std. Deviation
0.2 dB

These headphones have outstanding frequency response consistency. Once you get a solid fit using the included ear tips, you'll achieve constant audio delivery each time you use them.

Sound
Raw Frequency Response
9.1
Sound
Bass Accuracy
Std. Err.
1.19 dB
Low-Frequency Extension
10 Hz
Low-Bass
1.97 dB
Mid-Bass
0.69 dB
High-Bass
0.66 dB

These buds follow our target curve quite well, although there's still some deviation present in the low-bass. There's a bit of extra thump and rumble, which is more emphasized in the right driver. The rest of the range is very flat, so mixes have adequate punch and warmth.

8.9
Sound
Mid Accuracy
Std. Err.
1.48 dB
Low-Mid
0.01 dB
Mid-Mid
-1.15 dB
High-Mid
-1.69 dB

The mid accuracy is excellent. Overall, the range is quite flat, although there's some deviation present in the mid to high-mid. The right driver is underemphasized in the mid-mid, nudging vocals and instruments to the back of the mix. Vocals and instruments like the piano in Claude Debussy's Arabesque No. 1 are natural-sounding but lack some detail and clarity.

8.5
Sound
Treble Accuracy
Std. Err.
2.26 dB
Low-Treble
-0.72 dB
Mid-Treble
-0.68 dB
High-Treble
-4.9 dB

The Devialet Gemini 2 have excellent treble accuracy. There's some roll-off that starts in the high-mid range and continues into the treble range, but it's fairly minor. Vocals and instruments are still mostly clear while sibilants are present.

8.8
Sound
Peaks/Dips
Peaks
0.91 dB
Dips
0.53 dB

The peaks and dips performance is excellent. Mostly, the response is quite flat, meaning the headphones can control their sound profile well. There are a couple of notable deviations, though. A peak in the low-bass primarily affects the right driver, causing it to reproduce more bass than the left. Another deviation is in the mid-mid where the left driver nudges vocals and instruments forward while the right nudges them backward. Two peaks in the treble range affect both drivers, brightening vocals and instruments while sibilants become very piercing.

8.7
Sound
Imaging
Weighted Group Delay
0.28
Weighted Phase Mismatch
3.41
Weighted Amplitude Mismatch
0.71
Weighted Frequency Mismatch
1.43

The imaging performance of these buds is excellent. It's the first pair of headphones we've tested from this manufacturer, and it's worth mentioning that imaging can indicate their quality control and ergonomics. Imaging varies across units, though, and our unit has an elevated noise floor, which is annoying as the headphones generate a hissing sound. There's a big peak in the group delay as well as the phase response's low-bass, which results in a bass that gradually rolls up and lacks depth. If you're listening to especially bassy songs like Satisfaction by Benny Benassi, you'll find that the track lacks punch and is a bit sloppy.

That said, the L/R drivers are well-matched in the rest of their phase response and in amplitude and frequency response, which helps ensure the accurate placement of objects like voices in the stereo image.

0.2
Sound
Passive Soundstage
PRTF Accuracy (Std. Dev.)
N/A
PRTF Size (Avg.)
N/A
PRTF Distance
N/A
Openness
0.8
Acoustic Space Excitation
0.2

The passive soundstage performance is bad, but that's normal from in-ears. They bypass your outer ear, which needs to be activated by sound to create a more immersive sound. That means that the soundstage seems closed-off and small. Sound seems to be coming from inside your head rather than from speakers in the room around you.

0
Sound
Virtual Soundstage
Head Modeling
No
Speaker Modeling
No
Room Ambience
No
Head Tracking
No
Virtual Surround
No
8.3
Sound
Weighted Harmonic Distortion
WHD @ 90
0.170
WHD @ 100
0.084

The weighted harmonic distortion performance is great. There's a peak in the high-treble, but it's extremely hard to hear with real-life content, especially as we lose sensitivity to this range over time. All frequencies otherwise fall within good limits, resulting in clean and pure audio reproduction.

Sound
Test Settings
Firmware
1.3.7
Power
On
Connection
Bluetooth 5.1
Codec
aptX, 32-bit, 48kHz
EQ
Default
ANC
On
Tip/Pad
Silicone (small)
Microphone
Integrated

These are the settings used to test the Devialet Gemini 2, and our results are only valid when used in this configuration.

Isolation
9.2
Isolation
Noise Isolation - Full Range
Noise Cancelling Yes
Overall Attenuation
-24.99 dB
Bass
-22.78 dB
Mid
-24.05 dB
Treble
-28.72 dB

The Devialet Gemini 2 are equipped with a noise cancelling (ANC) system and can block out much of the low rumble of bus and plane engines. It even does a better job with longer sweeps, which means that the ANC performance improves when exposed to the same sound for long periods. However, in frequencies above the low-mid, the ANC does a worse job on than when off. Devialet advertises that they use a proprietary technology called 'Internal Delay Compensation', designed to compensate for the internal delay created by the noise cancellation loop, creating a gain in noise cancellation. The high noise floor and louder frequencies may counter-balance outside noise, contributing to the high results we see with ANC on. Still, the headphones can passively block out a lot of mid and treble-range noise like ambient chatter and the hum of AC units.

9.6
Isolation
Noise Isolation - Common Scenarios
Airplane Noise Attenuation
-22.65 dB
Airplane Noise Isolation Audio
Office Noise Attenuation
-22.57 dB
Office Noise Isolation Audio
Street Noise Attenuation
-24.89 dB
Street Noise Isolation Audio
Isolation
Noise Isolation - Voice Handling
Female Voice 1
Male Voice 1
Female Voice 2
Male Voice 2
Isolation
ANC Wind Handling
ANC Wind Noise
9.8
Isolation
Leakage
Leakage Audio
Overall Leakage @ 1ft
22.41 dB

The leakage performance is fantastic. Audio bleed is most prominent in the bass range, which sounds full-bodied. However, the amount of leakage is quite low, so you can listen to audio at high volumes without bothering others.

Microphone
Microphone
Microphone Style
Integrated
Yes
In-Line
No
Boom
No
Detachable Boom
No
Mic Yes
6.6
Microphone
Recording Quality
Recorded Speech
LFE
102.26 Hz
FR Std. Dev.
4.54 dB
HFE
6,267.15 Hz
Weighted THD
15.322
Gain
-2.14 dB

The integrated mic's recording quality is okay. Your voice sounds full-bodied but a bit muffled and dark. You won't have issues being understood clearly.

7.8
Microphone
Noise Handling
SpNR
19.49 dB
Noise Gate
Always On
Speech + Pink Noise Handling
8.0
Speech + Pink Noise Audio Sample
Speech + Subway Noise Handling
7.5
Speech + Subway Noise Audio Sample

The noise handling performance is very good. The integrated mic can separate your voice from background noise well. If you're taking a call from a busy office, your voice won't be drowned out, although your words won't be as clear. Devialet also advertises a wind reduction feature, which can help reduce wind noise while you're on a call.

Active Features
6.7
Active Features
Battery
Battery Type
Rechargable
Continuous Battery Life
4.8 hrs
Additional Charges
4.4
Total Battery Life
21.25 hrs
Charge Time
1.15 hrs
Power-Saving Feature
Standby mode
Audio While Charging
Yes
Passive Playback
No
Charging Port USB-C

The Devialet Gemini 2 have an alright battery performance. The manufacturer advertises up to five hours of continuous battery life, and we measured a similar amount. That said, battery life varies depending on use. If you need more battery life, the carrying case supplies over four extra charges if you need it, and you can use one bud while the other charges. The buds automatically pause when you also take one bud out of your ear.

8.0
Active Features
App Support
App Name Devialet Gemini
iOS Yes
Android Yes
macOS No
Windows No
Equalizer
Graphic + Presets
ANC Control
On/Off
Mic Control No
Room Effects
No
Playback Control
No
Button Mapping Yes
Surround Support
No

The Devialet Gemini app is great; you can see a video of how it works here. The app provides access to an EQ and presets so you can fine-tune their sound to your liking. You can also adjust the stereo balance, manage your control layout, check the battery life, and update the firmware.

Connectivity
0
Connectivity
Wired Connection
Analog Audio
No
USB Audio
No
Detachable
No
Length
N/A
Connector
No Wired Option
Latency - Analog
N/A
Latency - USB
N/A
Recorded Latency
N/A
Recorded Latency Connection No Wired Audio

The Devialet Gemini II are Bluetooth earbuds that you can't use wired. They come with a USB-A to USB-C cable for charging the case.

8.3
Connectivity
Bluetooth Connection
Bluetooth Version
5.2
Multi-Device Pairing
2 Devices
Quick Pair (Android)
Yes
Quick Pair (iOS)
No
Line Of Sight Range
334.65 ft (102.00 m)
Latency - SBC
271 ms
Latency - aptX
217 ms
Latency - aptX Adaptive (High Quality)
N/A
Latency - aptX Adaptive (Low Latency)
N/A
Latency - LDAC
N/A
Recorded Latency
Recorded Latency Codec aptX
AAC Support
Yes

These buds have great Bluetooth connectivity. They support multi-device pairing, so you can connect them with up to two devices at a time, and they support Google Fast Pair for seamless pairing with your Android devices. While the manufacturer also advertises iOS fast pairing, we couldn't get this feature to work with our iOS devices.

These headphones support SBC, AAC, and aptX codecs. AptX, in particular, is intended for better sound quality than the default SBC codec. That said, they have high latency on PCs via SBC and aptX. Some apps and devices compensate for latency, though.

0
Connectivity
Wireless Connection (Dongle)
Line Of Sight Range
N/A
Latency - Dongle
N/A
Recorded Latency
N/A
Connectivity
PC Compatibility
Analog
No
Wired USB
No
Non-BT Wireless
No

The Devialet Gemini 2 can connect to Bluetooth-enabled PCs. However, you can't connect them in any other way.

Connectivity
PlayStation Compatibility
PS4 Analog
No
PS4 Wired USB
No
PS4 Non-BT Wireless
No
PS5 Analog
No
PS5 Wired USB
No
PS5 Non-BT Wireless
No
Connectivity
Xbox Compatibility
Xbox One Analog
No
Xbox One Wired USB
No
Xbox One Non-BT Wireless
No
Xbox Series X|S Analog
No
Xbox Series X|S Wired USB
No
Xbox Series X|S Non-BT Wireless
No
2.2
Connectivity
Base/Dock
Type
Charging Case
USB Input
No
Line In
No
Line Out
No
Optical Input
No
RCA Input
No
Dock Charging
Yes
Power Supply
USB-C

These buds come with a carrying case that supplies over four extra charges. It also supports wireless charging.