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Boult Audio Mutant specifications and in-depth review

Boult Audio Mutant

Manufacturer: Boult Audio

The Boult Audio Mutant are true wireless earbuds designed for everyday use, offering a cable-free in-ear fit alongside a range of practical features suited to calls and casual listening. The earbuds support multipoint connectivity for up to two devices simultaneously, making it straightforward to switch between sources without manual re-pairing. Voice prompts, a mute function, and touch controls placed on the device round out the usability-focused feature set, and a travel bag is included in the box.

On the technical side, the Mutant uses a 13 mm driver unit with a frequency range of 20 Hz to 20,000 Hz and supports spatial audio for a wider soundstage. Passive noise isolation helps reduce ambient sound without active noise cancellation. Connectivity runs on Bluetooth 5.4 with an audio latency of 45 ms and a maximum wireless range of 10 m. The earbuds carry a rechargeable battery rated at 8 hours per charge, with the case extending total usage to 52 hours; fast charging is supported via USB Type-C, and a full charge takes approximately 1.5 hours. A four-microphone array with noise cancellation handles call clarity on the microphone side.

Pros
  • Bluetooth 5.4 keeps the wireless connection current and stable across a 10 m range
  • The charging case extends total playback to 52 hours, reducing how often charging is needed
  • Multipoint support lets the earbuds stay connected to two devices at the same time
  • Four microphones with noise cancellation improve voice clarity during calls
  • Fast charging via USB Type-C shortens downtime between listening sessions
  • A travel bag is included, adding a convenient storage option out of the box
Cons
  • No active noise cancellation, so sound isolation relies entirely on the passive in-ear fit
  • Wireless charging is not supported, requiring a cable for every charge
  • No in-ear detection means music will not pause automatically when an earbud is removed
  • The 10 m Bluetooth range is relatively short for open or larger spaces
  • No advanced audio codecs such as LDAC, aptX, or AAC are available, limiting high-quality audio transmission options
Who is this for?

The Boult Audio Mutant suits users who frequently switch between two devices, such as a phone and a laptop, thanks to its dual-device multipoint connectivity. The four-microphone array with noise cancellation makes it a practical pick for remote workers or commuters who rely on call clarity throughout the day. With a combined battery life of up to 52 hours including the charging case and fast charging support, it also works well for users who need extended daily use without frequent downtime.

Who is this NOT for?

Users who prioritize high-fidelity audio will find the Mutant limiting, as it lacks advanced codecs such as LDAC, aptX, or AAC, which are typically needed for lossless or near-lossless wireless audio. Those who work or move frequently in loud environments may also be underserved, since there is no active noise cancellation and isolation depends entirely on the passive in-ear fit. Additionally, users who expect modern convenience features like automatic ear detection for play/pause or a find-device function will not find those capabilities here.

Design:

Fit In-ear
has no wires or cables ✓
are neckband earbuds ✕
wingtips included ✕
has RGB lighting ✕
has stereo speakers ✓
has UV light ✕
Has a display ✕

The Boult Audio Mutant adopt a true wireless, in-ear design with no cables or neckband connecting the two earbuds, keeping the setup minimal and unencumbered. Each earbud houses a stereo speaker, and the design omits wingtips, RGB lighting, a UV light, and any on-unit display, reflecting a straightforward, no-frills physical form.

Sound quality:

has active noise cancellation (ANC) ✕
has passive noise reduction ✓
driver unit size 13 mm
lowest frequency 20 Hz
highest frequency 20000 Hz
supports spatial audio ✓
has Dolby Atmos ✕
has Dirac Virtuo ✕
has a neodymium magnet ✕

The Boult Audio Mutant uses a 13 mm driver unit and covers a frequency range of 20 Hz to 20,000 Hz, spanning the full extent of standard human hearing. It supports spatial audio for a more expansive soundstage, while passive noise reduction helps attenuate ambient sound without active noise cancellation. Dolby Atmos, Dirac Virtuo, and a neodymium magnet are not part of the hardware configuration.

Power:

Battery life 8 hours
Battery life of charging case 52 hours
charge time 1.5 hours
has wireless charging ✕
Has a solar power battery ✕
has a battery level indicator ✓
has a rechargeable battery ✓

The Boult Audio Mutant carries a rechargeable battery rated at 8 hours of playback per charge, with the accompanying charging case extending the total available battery to 52 hours. A full charge takes 1.5 hours, and a battery level indicator lets users keep track of remaining power. Wireless charging and solar power are not supported.

Connectivity:

has fast pairing ✕
Has USB Type-C ✓
Bluetooth version 5.4
has LDAC ✕
has LDHC ✕
has Bluetooth LE Audio ✕
has aptX Adaptive ✕
has aptX Low Latency ✕
has aptX HD ✕
has aptX ✕
has aptX Lossless ✕
audio latency 45 ms
has aptX Voice ✕
has Auracast ✕
maximum Bluetooth range 10 m
supports Bluetooth pairing using NFC ✕
Can be used wirelessly ✓
has AAC ✕

The Boult Audio Mutant connects wirelessly via Bluetooth 5.4 with a maximum range of 10 m and an audio latency of 45 ms. USB Type-C is available for wired charging, though NFC pairing and fast pairing are not supported. On the codec side, the earbuds do not include LDAC, LDHC, AAC, Auracast, Bluetooth LE Audio, or any variant of aptX, covering adaptive, low latency, HD, lossless, and voice formats alike.

Features:

has ambient sound mode ✕
has in/on-ear detection ✕
has find device feature ✕
Supports fast charging ✓
multipoint count 2
can read notifications ✕
has a mute function ✓
can be used as a headset ✓
control panel placed on a device ✓
Has voice prompts ✓
travel bag is included ✓
Has an in-line control panel ✕
Has a temperature sensor ✕
Has a built-in camera remote control function ✕

The Boult Audio Mutant supports multipoint connectivity for up to two devices at once and can function as a headset for calls, backed by a mute function and voice prompts for hands-free feedback. Controls are handled through a panel placed on the earbuds themselves rather than an in-line remote, and fast charging is available for quicker power top-ups. A travel bag is included in the package. The earbuds do not offer ambient sound mode, in-ear detection for auto-pause, a find-device feature, notification readout, a body temperature sensor, or a camera remote shutter function.

Microphone:

number of microphones 4
has a noise-canceling microphone ✓

The Boult Audio Mutant is equipped with a four-microphone array that includes noise cancellation, helping to reduce unwanted background sound during calls and voice interactions.

Final Verdict

The Boult Audio Mutant is a straightforward pair of true wireless earbuds that delivers where everyday practicality matters most. Its 52-hour combined battery life with fast charging and dual-device multipoint support make it a reliable companion for users with busy, device-switching routines, while the four-microphone noise-canceling setup adds meaningful value for calls. The absence of active noise cancellation and advanced audio codecs does narrow its appeal for audiophiles or users in consistently noisy settings, but for those whose priorities center on call quality, extended battery endurance, and cable-free convenience, the Mutant covers the essentials competently.

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