A breakdown of the review per specifications

Ingress Protection (Ip) Rating

Devialet Gemini IPX4

Bowers & Wilkins PI7 IP54

IP ratings is the level of protection offered by an enclosure, against dust and liquids. The letters 'IP' are followed by two values The first value of the IP rating refers to protection against solids such as dust, followed by the one that refers to resistance against liquids (sweat).

Having a value of IPX4, the Devialet Gemini's rating for solids indicates that no data available to specify a protection rating, and of liquids that they can withstand low pressure spray similar to that of a shower head when tilted at 180° for 10 minutes.

Compared to the Devialet Gemini, Bowers & Wilkins PI7 have a rating of IP54 meaning that ingress of dust is not totally prevented but dust does not enter in harmful quantities to interfere with the correct operation or impair safety and that of liquids is that, they both have the same rating against liquids

Weight

Devialet Gemini 8g

Bowers & Wilkins PI7 50g

Devialet Gemini have a weight of 8g . We consider a lower weight best because lighter devices are easier to move with.

The Bowers & Wilkins PI7, at 50g weigh more than the Devialet Gemini with a difference of 42g

Has No Wires Or Cables

Devialet Gemini ✓

Bowers & Wilkins PI7 ✓

True wireless devices have no wires linking any part of the device together, Devialet Gemini are true wireless for this case since they have no wires. This is an important distinction since wireless earbuds have cables linking the 2 earbuds .

Bowers & Wilkins PI7 also is true wireless since it doesn't have wires connecting the 2 earbuds .

Sweat Resistance

Devialet Gemini ✓

Bowers & Wilkins PI7 ✗

Devialet Gemini are resistant to sweat

Has Stereo Speakers

Devialet Gemini ✓

Bowers & Wilkins PI7 ✓

Devialet Gemini have stereo speakers, devices with stereo speakers deliver sound from independent channels on both left and right sides, this creates a richer sound and a better listening experience.

Both Bowers & Wilkins PI7 and Devialet Gemini have stereo speakers

Devialet Gemini
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Has Active Noise Cancellation (Noise Control)

Devialet Gemini ✓

Bowers & Wilkins PI7 ✓

ANC uses advanced technology to actively counter noise. How it works, it listens to the sound pattern of incoming noise and generates a mirror signal to cancel it out. In simple terms, it's like taking +1 (noise) then adding -1 (inverted noise) to make zero which results in a reduced level of noise.

Devialet Gemini have Active Noise Cancellation enabling you to listen at lower volume levels, causing less ear fatigue as you don't have to crank up the earbuds volume to outcompete background noise.

The Bowers & Wilkins PI7 too have Active Noise Cancellation which makes both earbuds ideal for plane rides and rush hour commutes. Each operate with different noise cancellation settings, pick the mode that you prefer for commute or that suites your relaxation time.

Has Passive Noise Reduction

Devialet Gemini ✓

Bowers & Wilkins PI7 ✓

The Devialet Gemini sit well in place, creating a sound covering that tones down your environment noise and also prevents the earbuds voice audio from leaking out at the same.

Both Bowers & Wilkins PI7, and Devialet Gemini have passive noise reduction this means that they tone down ambient noise instead of actively using technology to cancel it out.

Driver Unit Size

Devialet Gemini 10mm

Bowers & Wilkins PI7 9.2mm

Devialet Gemini have a unit size of 10mm in diameter, the bigger the unit the more powerful, therefor producing better bass. The driver unit is basically a mini speaker that makes sound in the earbuds, its size corellates with the loudness of the device.

Bowers & Wilkins PI7 driver unit is 9.2mm in diameter, which means that they have a smaller driver unit than that of Devialet Gemini by 0.8mm , a common assumption that driver units of a bigger size automatically produce better sound quality.

However, large drivers find it difficult to produce high frequencies so yes, larger drivers can generate louder sound, but this does not mean that they deliver better quality sound.

Lowest Frequency

Devialet Gemini 5Hz

Bowers & Wilkins PI7 10Hz

Devialet Gemini's lowest frequency is at 5Hz, low-frequency response inidcates how well an audio component generates low recognizable frequencies and if it makes any changes to the signal on its way through.

Bowers & Wilkins PI7's lowest frequency is at 10Hz, this implies that Devialet Gemini make sound with a juicier bass than the Bowers & Wilkins PI7

Highest Frequency

Devialet Gemini 20000Hz

Bowers & Wilkins PI7 20000Hz

Devialet Gemini's highest frequency is at 20000Hz, high-frequency response indicates how well a particular audio component produces high human frequencies and if it makes any adjustments to the signal on its way through.

Bowers & Wilkins PI7's highest frequency is at 20000Hz, this means that both devices produce equal treble

Sound Pressure Level

Devialet Gemini 94dB/mW

Bowers & Wilkins PI7 ✗

SPL, is the level of pressure of sound, measured in decibels, dB, Devialet Gemini's measurement is 94dB/mW. Devices with a higher sound pressure level are generally louder when supplied with any given audio source.

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Battery Life

Devialet Gemini 6hours

Bowers & Wilkins PI7 4.5hours

Devialet Gemini's battery life is 6 hours, these last longer than 5 hours of listening which is considered average for a single charge. A device's battery life is commonly given by the manufacturer, and with longer battery life, you get to use it for longer and requires fewer chargings.

Bowers & Wilkins PI7's battery life is less than that of Devialet Gemini by 1.5 hours . Every time you recharge your earbuds, they get a little less playing time. The effect is barely noticeable at first, but over time, your wireless earbuds will have shorter listening time.

Battery Life Of Charging Case

Devialet Gemini 18hours

Bowers & Wilkins PI7 18hours

The battery life of the charging case is given by the manufacturer, and Devialet Gemini's case has a full charge of 18 hours. A charging case with a longer battery life enables you to recharge your earbuds on the go many times before recharging the case itself.

Bowers & Wilkins PI7's charging case has a battery life of 18 hours, equal to that of the Devialet Gemini

Charge Time

Devialet Gemini 1.5hours

Bowers & Wilkins PI7 3hours

It takes 1.5 hours to fully charge the Devialet Gemini's battery. It is highly adivsable to charge fully the battery before using the earbuds when they have been unused for extended periods.

Bowers & Wilkins PI7 takes 3 hours to fully charge the battery, more than that of Devialet Gemini by 1.5 hours

Battery Power

Devialet Gemini 55mAh

Bowers & Wilkins PI7 ✗

Devialet Gemini's battery capacity is 55mAh, battery power, represents the amount of electrical energy that a battery can keep.

Has Wireless Charging

Devialet Gemini ✓

Bowers & Wilkins PI7 ✓

The Devialet Gemini, the device supports wireless charging. To charge the device, you just place down on a supported charging pad.

Bowers & Wilkins PI7 also support wireless charging, always look out for the charging standard of the earbuds.

Has A Battery Level Indicator

Devialet Gemini ✓

Bowers & Wilkins PI7 ✓

The Devialet Gemini have a battery level indicator, an indicator shows you when the device has a low battery. Its lights indicate the charging state of your earbuds and charging case.

Bowers & Wilkins PI7 too have a battery level indicator, these enable you to determine the charging state of your device, whether fully charged, or the battery is running low.

Devialet Gemini
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Has Usb Type-C

Devialet Gemini ✓

Bowers & Wilkins PI7 ✓

The Devialet Gemini have USB TYPE-C, an industry-standard connector for transmitting both data and power in a single cable.

Bowers & Wilkins PI7 too support USB TYPE-C. This USB-C plug is part and parcel of most current electronics.

Bluetooth Version

Devialet Gemini v5

Bowers & Wilkins PI7 v5

Devialet Gemini have Bluetooth version of 5, Bluetooth is a wireless technology standard that allows data movement between devices placed in close proximity, using short-wavelength, ultra-high frequency radio waves.

Bowers & Wilkins PI7 has a Bluetooth version of 5, equal to that of the Devialet Gemini . Newer versions provide faster data transfers.

Maximum Bluetooth Range

Devialet Gemini 10meters

Bowers & Wilkins PI7 10meters

The Devialet Gemini have a 10meters distance connecting via Bluetooth.

Bowers & Wilkins PI7 have a maximum range of 10meters, equal to that of the Devialet Gemini

Has Aac

Devialet Gemini ✓

Bowers & Wilkins PI7 ✓

Devialet Gemini support AAC, a codec that is used for Bluetooth audio. It supports 24-bit audio at 250kbps. Since it uses psychoacoustic modeling, it provides better results than other codecs at the same bit rate.

Since its the highest quality codec that any Bluetooth-supporting Apple product supports, the Devialet Gemini will work well with your iPad. If you are planning on using these with Android , ensure that they also support aptX HD, LDAC, or LHDC as well.

The Bowers & Wilkins PI7 support AAC as well. Designed to be the successor of the MP3 format, AAC generally achieves higher sound quality than MP3 encoders at the same bit rate.

Has Aptx Adaptive

Devialet Gemini ✓

Bowers & Wilkins PI7 ✓

The Devialet Gemini support APTX Adaptive, an audio codec for Bluetooth devices that are developed by Qualcomm. It has a variable bit rate (between 279kbps and 420kbps).

Bowers & Wilkins PI7 support APTX Adaptive as well which means both can adjust the bit rate for different scenarios, such as listening to HD audio from other devices.

Has Aptx Hd

Devialet Gemini ✗

Bowers & Wilkins PI7 ✓

The Bowers & Wilkins PI7 support APTX HD, an audio codec for Bluetooth devices that are developed by Qualcomm. It supports high-quality 24-bit audio (at a bit rate of 576kbps).

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Number Of Microphones

Devialet Gemini 2only

Bowers & Wilkins PI7 6only

The Devialet Gemini have 2 microphones.

Bowers & Wilkins PI7 microphones are 6, more than that of Devialet Gemini by 4 . More microphones record better sound quality and enable the earbuds to filter out background sounds.

Has A Noise-Canceling Microphone

Devialet Gemini ✓

Bowers & Wilkins PI7 ✓

Devialet Gemini have a noise-canceling type of microphone, these microphones are designed to reduce noise from the desired sound.

The Bowers & Wilkins PI7 too use a noise-canceling microphone. This is useful in noisy environments.

Devialet Gemini
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Has Ambient Sound Mode

Devialet Gemini ✓

Bowers & Wilkins PI7 ✓

The Devialet Gemini support ambient sound mode, which uses microphones to pass through ambient noises so that they can still be heard even when wearing them

The Bowers & Wilkins PI7 support ambient sound mode as well, helpful when you want to listen to music but also be aware of your surrounding, for example when you’re having a jog but would still want to hear traffic.

Has In/On-Ear Detection

Devialet Gemini ✓

Bowers & Wilkins PI7 ✓

Devialet Gemini support in/on-ear detection, the sensors in the device can detect when they are removed from your ears .

Bowers & Wilkins PI7 support in/on-ear detection, automatically pauses your music, or audiobook when you remove earbuds from your ears saving battery life.

Has Find Earbuds Feature

Devialet Gemini ✓

Bowers & Wilkins PI7 ✓

When lost in a room, or can't easily find them in your bag, the Devialet Gemini support the find earbuds feature.

Bowers & Wilkins PI7 also have the find earbuds feature. Simply use the earbuds app on your phone to play a sound from your earbuds to help you find them.

Supports Fast Charging

Devialet Gemini ✓

Bowers & Wilkins PI7 ✓

The Devialet Gemini support fast charging. Commonly, technologies like MediaTek’s Pump Express, are used to lower the time it takes to fully charge the earbuds.

Also the Bowers & Wilkins PI7 too support fast charging. It's very similar to regular charging, only that the battery is filling up much faster. For example, with Quick Charge 3.0, the battery can be charged to 50% in just thirty minutes.

Has A Mute Function

Devialet Gemini ✗

Bowers & Wilkins PI7 ✓

The Bowers & Wilkins PI7 have a mute function, they support the feature to mute/unmute a conversation directly from the earbuds.

Control Panel Placed On A Device

Devialet Gemini ✓

Bowers & Wilkins PI7 ✓

With the Devialet Gemini, so you can easily access the volume control, pause, play, mute, etc whichever features are supported on the device.

The Bowers & Wilkins PI7 also have a control panel on them.

Warranty Period

Devialet Gemini 2Years

Bowers & Wilkins PI7 ✗

The Devialet Gemini have a warranty period of 2 Years, the period of time that warrant free repair and adjustment services in case of a malfunction occurring under normal use that has followed instruction manuals.

Has Voice Prompts

Devialet Gemini ✓

Bowers & Wilkins PI7 ✓

Devialet Gemini support voice prompts. Automatically receive information through audio messages, like if there is a problem with the connection.

The Bowers & Wilkins PI7 also support voice prompts .i.e the device notifies you when the battery is low, and you need to recharge them.

Travel Bag Is Included

Devialet Gemini ✓

Bowers & Wilkins PI7 ✓

The Devialet Gemini come with a special case. Carrying earbuds without a case, or placing them in your pockets without a casing may easily put them at risk of getting damaged.

Bowers & Wilkins PI7 also have a case included, which is useful for safe transportation.

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Category	Features	Devialet Gemini	Bowers & Wilkins PI7
DESIGN	ingress protection (ip) rating	IPX4	IP54
	weight	8g	50g
	has no wires or cables	✓	✓
	sweat resistance	✓	✗
	has stereo speakers	✓	✓
SOUND QUALITY	has active noise cancellation (noise control)	✓	✓
	has passive noise reduction	✓	✓
	driver unit size	10mm	9.2mm
	lowest frequency	5Hz	10Hz
	highest frequency	20000Hz	20000Hz
	sound pressure level	94dB/mW	✗
POWER	battery life	6hours	4.5hours
	battery life of charging case	18hours	18hours
	charge time	1.5hours	3hours
	battery power	55mAh	✗
	has wireless charging	✓	✓
	has a battery level indicator	✓	✓
CONNECTIVITY	has usb type-c	✓	✓
	bluetooth version	v5	v5
	maximum bluetooth range	10meters	10meters
	has aac	✓	✓
	has aptx adaptive	✓	✓
	has aptx hd	✗	✓
MICROPHONE	number of microphones	2only	6only
MICROPHONE	has a noise-canceling microphone	✓	✓
EXTRAS	has ambient sound mode	✓	✓
	has in/on-ear detection	✓	✓
	has find earbuds feature	✓	✓
	supports fast charging	✓	✓
	has a mute function	✗	✓
	control panel placed on a device	✓	✓
	warranty period	2Years	✗
	has voice prompts	✓	✓
	travel bag is included	✓	✓
		See price on Amazon	See price on Amazon

A Review By Comparison of the Devialet Gemini Vs. Bowers & Wilkins Pi7

Reasons why you might like the Devialet Gemini

Reasons why you might like the Bowers & Wilkins PI7

A summary of the review by feature comparison

A breakdown of the review per specifications

Design

Ingress Protection (Ip) Rating

Weight

Has No Wires Or Cables

Sweat Resistance

Has Stereo Speakers

Sound Quality

Has Active Noise Cancellation (Noise Control)

Has Passive Noise Reduction

Driver Unit Size

Lowest Frequency

Highest Frequency

Sound Pressure Level

Power

Battery Life

Battery Life Of Charging Case

Charge Time

Battery Power

Has Wireless Charging

Has A Battery Level Indicator

Connectivity

Has Usb Type-C

Bluetooth Version

Maximum Bluetooth Range

Has Aac

Has Aptx Adaptive

Has Aptx Hd

Microphone

Number Of Microphones

Has A Noise-Canceling Microphone

Extras

Has Ambient Sound Mode

Has In/On-Ear Detection

Has Find Earbuds Feature

Supports Fast Charging

Has A Mute Function

Control Panel Placed On A Device

Warranty Period

Has Voice Prompts

Travel Bag Is Included

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