Boult Z40 Ultra Review: Premium Features at a Budget Price

HomeReviewsBoult Z40 Ultra Review: Premium Features at a Budget Price


  • Minimalist design and comfortable fit, ideal for extended wear and physical activities.
  • Active noise cancellation and dual device connectivity enhance user experience.
  • Exceptional sound quality with balanced audio signature and effective noise cancellation.
  • Impressive battery life with 100 hours of playtime and fast charging capability.

In a market brimming with choices, the Boult Z40 Ultra is a brand-new offering that strikes a balance between price and performance, promising an audio experience that doesn’t break the bank.

With an attractive introductory price tag of Rs 1,999, expectations were high as I delved into what this device had to offer.

Here is my complete Boult Z40 Ultra review.

Boult Z40 Ultra: Unboxing

Boult Z40 Ultra: Unboxing
Boult Z40 Ultra: Unboxing

The unboxing experience was straightforward, yet satisfying.

The packaging was neat and functional, housing the earbuds, a charging case, USB-C cable for charging, extra ear tips for a customized fit, and a user manual.

Everything one needs to get started was included, setting a positive tone for what was to come.

Boult Z40 Ultra: Design and Comfort

Boult Z40 Ultra: Design and Comfort
Boult Z40 Ultra: Design and Comfort

The first thing that struck me about the Z40 Ultra was its minimalist yet sophisticated design.

Holding them, I felt a sense of premium craftsmanship that isn’t always present in products at this price point.

The earbuds fit snugly in my ears, providing a secure fit that instilled confidence during my jogs and workouts.

As mentioned there are a variety of silicon tips available so that you get the size that fits you.

The touch controls responded with precision to my inputs, making the interaction seamless and intuitive.

Their lightweight design meant I could wear them for hours without any discomfort, a crucial aspect for someone who uses earbuds extensively throughout the day.

It is also very easy to take the earbuds out of the case.

Speaking of which the case itself has a stealthy matte-black colour combo and textured material on the outside.

It charges via USB Type-C port at the bottom and has indicator lines

Boult Z40 Ultra: Features

Boult Z40 Ultra: Features
Boult Z40 Ultra: Features

Diving into the features, the Z40 Ultra proved to be more than just a pair of earbuds.

The active noise cancellation feature was a game-changer for me.

Whether I was in a crowded cafe or amidst city traffic, it allowed me to immerse myself fully in my music.

The dual device connectivity enhanced my productivity, letting me switch between my laptop and smartphone effortlessly.

The inclusion of features like fast charging and IPX5 water resistance not only added to its versatility but also to its durability, making it an all-weather companion.

Unfortunately, the Z40 Ultra does not have any kind of companion app on iOS so customisation is a bit of a limit with these TWS.

Boult Z40 Ultra: Sound Quality, ANC, and Microphone

Boult Z40 Ultra: Sound Quality, ANC, and Microphone
Boult Z40 Ultra: Sound Quality, ANC, and Microphone

Diving into my experience with the Boult Z40 Ultra, the sound quality immediately stood out.

Boult talks of a SonicCore Dynamic processor in the Z40 Ultra which assists with the audio enhancements.

The balanced sound signature, with its emphasis on clarity and detail, made every genre of music I played through them resonate beautifully.

Listening to “Bad Guy” by Billie Eilish, the bass felt deep and punchy, enriching the song’s moody ambiance without overshadowing the mids.

The balanced mids brought out the warmth and clarity in “Thinking Out Loud” by Ed Sheeran, making it feel like a personal performance.

When it came to classical pieces like Beethoven’s “Symphony No.9,” the crisp highs illuminated the symphony’s intricate details, showcasing the Z40 Ultra’s capability to deliver a broad and immersive soundstage.

The Active Noise Cancellation (ANC) technology enhanced this experience further by effectively muting up to 32dB of external noise, allowing me to lose myself in the music, regardless of my surroundings.

It provided an immersive listening experience that few earbuds in this price range can match.

Moreover, the microphone quality significantly bolstered my call experiences.

The quad-mic setup with environmental noise cancellation (ENC) ensured my voice was transmitted clearly, reducing background noise effectively.

Whether I was in a noisy café or amidst city traffic, calls were crystal clear, making the Z40 Ultra not just a fantastic musical companion but also a reliable tool for both personal and professional communication.

The ENC also proved invaluable for voice assistant commands, recognizing them accurately even in noisy environments.

There’s also some low latency mode for gaming but I couldn’t test that out thoroughly.

Overall, the Boult Z40 Ultra’s sound profile is well-suited for a wide array of musical tastes, from the deep lows of electronic dance music to the high-resolution detail required for classical music, providing an enriching auditory experience that belies its cost-effective pricing.

Boult Z40 Ultra: Battery Life

Boult Z40 Ultra: Battery Life
Boult Z40 Ultra: Battery Life

The battery life of the Z40 Ultra is nothing short of extraordinary.

The promise of 100 hours of playtime with the case was met with skepticism at first, but it lived up to its claims.

The fast charging feature was a lifesaver, providing enough juice for several hours of playback with just a few minutes of charging. 

Safe to say a full charge provides enough juice in the bank to last a week without even looking at the charger.

Final Verdict

Final Verdict
Final Verdict

Considering its price of Rs 1,999, the Boult Z40 Ultra offers an exceptional value proposition.

It delivers in areas that matter the most – sound quality, comfort, battery life, and additional features.

While it may not outperform the premium segment, it certainly sets a high standard for budget-friendly earbuds.

I think that the Boult Z40 Ultra is a stellar choice for anyone looking to dive into the world of high-quality audio without spending a fortune.

It’s a testament to how far the audio technology has come, making premium features accessible to a wider audience.

Whether you’re an audiophile on a budget or simply seeking a reliable pair of earbuds for everyday use, the Z40 Ultra deserves your consideration.

5 Reasons to Buy

5 Reasons to Buy
5 Reasons to Buy
  • Exceptional active noise cancellation for immersive listening: The Boult Z40 Ultra’s ANC technology effectively silences external noise up to 32dB, allowing for a deeply immersive audio experience without distractions from the outside world. 
  • Impressive battery life that lasts for days on a single charge: With up to 100 hours of total playtime, the Z40 Ultra stands out for its long-lasting battery life. 
  • High-quality microphone for clear calls and voice commands: The quad mic setup with Environmental Noise Cancellation (ENC) ensures that your voice is transmitted clearly during calls, reducing background noise effectively. 
  • Versatile connectivity options including dual device pairing: The ability to connect to two devices simultaneously enhances productivity and convenience, allowing users to switch between devices effortlessly.
  • Affordable price point offering great value for money: Priced at Rs 1,999, the Z40 Ultra offers an array of premium features at a budget-friendly cost, making it an excellent value proposition for those seeking high-quality audio experiences without a hefty price tag.

3 Reasons Not to Buy

3 Reasons Not to Buy
3 Reasons Not to Buy
  • No companion app support on iOS for customisable settings: The lack of a companion app for iOS devices means users miss out on customizing their audio experience
  • Soundstage may not be as expansive: While the Z40 Ultra provides a commendable soundstage for in-ear earbuds, it may not match the expansive, room-filling audio experience that over-ear headphones can offer, which might be a drawback for some audiophiles.
  • Limited colour options compared to competitors: With only three color options available, users looking for a wider variety of aesthetic choices might find the Z40 Ultra’s selection restrictive.

Top 5 Alternatives Under Rs 2,000

Anker Soundcore R50i (Price: Rs 1,599)

Anker Soundcore R50i
  • 10mm drivers for rich audio and powerful bass.
  • Bluetooth 5.3 for stable connectivity.
  • Up to 30 hours of battery life with the case.
  • IPX5 water resistance.
  • Custom EQ presets through the Soundcore Connect App.
  • Durable ABS and PC construction​​.

OnePlus Nord Buds 2R (Price: Rs 1,990 to Rs 2,199)

OnePlus Nord Buds 2r
OnePlus Nord Buds 2r
  • 12.4mm drivers with high bass and custom EQ setting.
  • Bluetooth 5.2 with AAC, SBC, Dolby codec support.
  • Up to 35 hours of battery life with fast charging.
  • IP55 water and dust resistance.
  • Compatible with HeyMelody app for touch control customization.
  • Lacks ANC but offers a decent mic quality​​.

pTron Bassbuds Wave (Price: Rs 1,099)

pTron Bassbuds NYX TWS Earbuds
pTron Bassbuds Wave
  • Environmental noise cancellation (ENC) with dual mics.
  • Low-latency mode for improved audio-video sync.
  • Stereo and mono modes.
  • Up to 40 hours of playback time with the case.
  • IPX4 water and dust resistance.
  • Type-C charging​​.

BoAt Airdopes 441 (Price: Rs 1,999)

BoAt Airdopes 441
  • Best for bass-heavy music with 8mm drivers.
  • IPX7 water and sweat resistance.
  • Up to 14 hours of total playback time with the case.
  • Bluetooth 5.0 for stable connectivity.
  • LED battery indicator on the case.
  • Ergonomically designed for comfort​​.

Realme Buds Air 3 Neo (Price: Rs 1,999)

Realme Buds Air 3 Neo
  • Dolby Atmos support with a 10mm Dynamic Bass Driver.
  • AI ENC noise cancellation for clear calls.
  • Up to 30 hours of playback time with fast charging.
  • Bluetooth 5.2 for high-quality music playback.
  • Low-latency audio playback of 88 ms.
  • IPX5 water resistance​​.
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What sets the Boult Z40 Ultra apart from other earbuds in the same price range?

The Boult Z40 Ultra distinguishes itself with premium features like active noise cancellation, balanced sound quality, and an impressive battery life of 100 hours with the case. These features are typically found in higher-priced earbuds, making the Z40 Ultra a standout choice for budget-conscious consumers seeking quality.

How does the active noise cancellation in Boult Z40 Ultra enhance the listening experience?

The ANC technology in the Z40 Ultra effectively mutes up to 32dB of external noise, allowing for an immersive listening experience.

This means users can enjoy their music, podcasts, or calls without being disturbed by their surroundings, making it ideal for travel, work, or leisure.

Is the Boult Z40 Ultra suitable for use during physical activities?

Yes, the earbuds’ snug fit and IPX5 water resistance make them suitable for workouts, runs, and other physical activities.

They stay securely in place even during vigorous movements, and their water resistance protects them from sweat and light rain.

Can the Boult Z40 Ultra connect to multiple devices simultaneously?

Yes, the Z40 Ultra features dual device connectivity, allowing users to effortlessly switch between two devices, such as a laptop and a smartphone.

This is particularly useful for those who multitask or switch between personal and work devices.

What about the Boult Z40 Ultra’s battery life and charging capabilities?

The Z40 Ultra offers a remarkable 100 hours of playtime with the charging case, and its fast charging feature provides several hours of playback with just a few minutes of charging.

This makes the earbuds highly convenient for users who need reliable performance throughout the week.

How is the battery of Boult Z40 Ultra ?

The Boult Z40 Ultra earbuds are touted to deliver up to 100 hours of playback in total, which is impressive to say the least.

Despite its affordable price tag, the Z40 Ultras also support fast charging over a USB Type-C port, capable of delivering 100 minutes of playback with a 10-minute charge. Battery life on the Z40 Ultra earbuds is well above the average.

How is the Design & Build of Boult Z40 Ultra ?

The Boult Z40 Ultra earbuds comes in three different shades – Black, Beige, and Metallic. While plastic is the pre-dominant material used in the build of all three options, the Beige variant features a rubber finish.

On the other hand, the Black version uses a combination of rubber and glossy plastic, while the Metallic variant features brushed metallic finish with a fully plastic build.

The Z40 Ultra’s case features a more traditional design as compared to the Boult Z40 Pro. The case comes with LED indicators on the front and a USB Type-C port on the bottom.

The earbuds themselves feature a stem design with a plastic build. They are IPX5 rated for resistance to sweat or light rain/mild splashes of water.

What are the features of Boult Z40 Ultra ?

Boult’s latest true wireless earbuds are equipped with 10mm drivers with “Boom X” technology to ramp up the bass.

It also supports SBC and AAC codecs. One very useful feature on the Z40 Ultra’s is dual device connection, which allows you to pair the earbuds to two devices via Bluetooth 5.3 and seamlessly switch between them.

The earbuds also support Google Assistant and Siri that can be accessed by long pressing the left earbud. The Z40 Ultras also come with a large touch sensitive area that allows you to control playback, adjust volume, respond to calls, switch between modes, and much more.

The Prism Voice PLC feature brings AI-power to calling, while ‘Zen Mode’ enhances call clarity.

Which Color’s is the Boult Z40 Ultra available in ?

It will be available in three colours Black,Metallic, Beige.

What is the price & availability of Boult Z40 Ultra ?

The much-anticipated BOULT Z40 Ultra TWS is now within reach at a special launch price of INR 1,999. This exclusive offer is available on Flipkart, Amazon, and

Also Read: BOULT TWS Z40 Ultra Redefining Budget TWS Launched in India with ANC, Sonic Core Dynamics, Prism Voice PLC, and Dual Stream DSP: Price , Specifications & Availability

Also Read: Boult Z40 Pro TWS Review: Unbeatable Battery and Premium Design

Also Read: BOULT’s 2023 Success and Forward-Looking Strategy: An Exclusive Interview with Co-Founder Varun Gupta

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