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Boult Audio Curve Max specifications and in-depth review

Boult Audio Curve Max

Manufacturer: Boult Audio

The Boult Audio Curve Max is a neckband-style wireless earbud designed for extended daily use. It connects over Bluetooth and features an in-line control panel along with voice prompts, making it straightforward to manage playback and calls without reaching for a paired device. The earbuds support multipoint connectivity for up to two devices simultaneously, which adds flexibility for users who switch between a phone and a laptop throughout the day.

On the technical side, the Curve Max uses a 13 mm driver unit covering a frequency range of 20 Hz to 20,000 Hz, paired with passive noise reduction to help block ambient sound. A single noise-canceling microphone handles call audio, and the mute function gives users quick control during conversations. Charging is handled via USB Type-C with fast charging support, and the rated battery life reaches 100 hours. Audio latency is specified at 50 ms over a maximum Bluetooth range of 10 m, and the IPX5 rating means the earbuds can handle sweat and light moisture without issue.

Pros
  • Rated for 100 hours of battery life, reducing how often the device needs to be charged
  • Supports simultaneous connection to two devices via multipoint Bluetooth pairing
  • Fast charging support helps minimize time spent tethered to a power source
  • Includes an in-line control panel and mute function, making call and playback management straightforward without a phone
  • IPX5-rated sweat resistance makes it suitable for physical activity
  • Bluetooth 5.3 offers a stable wireless connection with a 50 ms audio latency
Cons
  • No active noise cancellation, so sound isolation depends entirely on the passive fit of the ear tips
  • Does not support any advanced audio codecs such as aptX, LDAC, AAC, or LDHC, limiting audio transmission quality
  • Maximum Bluetooth range is limited to 10 m
  • NFC pairing and fast pairing are both absent, requiring manual Bluetooth setup each time
  • Only a single microphone is included, which may limit call audio pickup in noisier environments
  • No ambient sound mode, meaning external audio cannot be let in without removing the earbuds
Who is this for?

The Boult Audio Curve Max is well suited to users who prioritize long listening sessions without frequent recharging, given its 100-hour battery rating and fast charging support. The neckband form factor and IPX5 sweat resistance make it a practical choice for gym use, outdoor workouts, or commutes where secure fit and moisture tolerance matter. Those who regularly switch between two devices — such as a phone and a laptop — will also benefit from the built-in multipoint connectivity, and the in-line control panel with mute function makes it a functional option for anyone who takes frequent calls throughout the day.

Who is this NOT for?

Users who rely on active noise cancellation to work or focus in loud environments will find this product limiting, as it offers only passive noise isolation through the ear tips. Audiophiles or anyone streaming high-resolution audio will be underserved by the absence of advanced codecs like LDAC, aptX, or AAC, which restricts the quality of the wireless audio signal. Additionally, those who prefer a completely wire-free listening experience will not be satisfied with the neckband design, as the cable connecting the two earpieces remains a physical presence during use.

Design:

Fit In-ear
Ingress Protection (IP) rating IPX5
water resistance Sweat resistant
has no wires or cables ✕
are neckband earbuds ✓
wingtips included ✕
has stereo speakers ✓

The Boult Audio Curve Max follows a neckband design with an in-ear fit, keeping the earbuds secured during movement without relying on wingtips. It is not a true wireless model, as the neckband connects the two earpieces. Both earpieces deliver stereo audio output, and the unit carries an IPX5 rating, making it resistant to sweat and moisture during workouts or outdoor use.

Sound quality:

has active noise cancellation (ANC) ✕
has passive noise reduction ✓
driver unit size 13 mm
lowest frequency 20 Hz
highest frequency 20000 Hz
has a neodymium magnet ✕

The Curve Max uses a 13 mm driver unit and covers a frequency range of 20 Hz to 20,000 Hz, spanning the full standard audible spectrum. It relies on passive noise reduction to limit ambient sound, as active noise cancellation is not included. The drivers do not use a neodymium magnet, and there is no ANC circuitry involved in the sound delivery.

Power:

Battery life 100 hours
has wireless charging ✕
has a battery level indicator ✓
has a rechargeable battery ✓

The Boult Audio Curve Max is equipped with a rechargeable battery rated for 100 hours of battery life, making it suited for extended use between charges. A battery level indicator is included so users can monitor remaining charge at a glance. Wireless charging is not supported, so the device must be plugged in to recharge.

Connectivity:

has fast pairing ✕
Has USB Type-C ✓
Bluetooth version 5.3
has LDAC ✕
has LDHC ✕
has aptX Adaptive ✕
has aptX Low Latency ✕
has aptX HD ✕
has aptX ✕
has aptX Lossless ✕
audio latency 50 ms
has aptX Voice ✕
maximum Bluetooth range 10 m
supports Bluetooth pairing using NFC ✕
Can be used wirelessly ✓
has AAC ✕

The Boult Audio Curve Max connects wirelessly via Bluetooth 5.3 and supports a maximum range of 10 m, with an audio latency of 50 ms. It does not support fast pairing or NFC-based pairing, and none of the advanced audio codecs are available — including aptX, aptX HD, aptX Adaptive, aptX Low Latency, aptX Lossless, aptX Voice, LDAC, LDHC, or AAC. The USB Type-C port handles wired charging, though it is not used for audio connectivity in this wireless setup.

Features:

has ambient sound mode ✕
has in/on-ear detection ✕
has find device feature ✕
Supports fast charging ✓
multipoint count 2
has a mute function ✓
can be used as a headset ✓
control panel placed on a device ✓
warranty period 1 years
Has voice prompts ✓
travel bag is included ✕
Has an in-line control panel ✓
Has a temperature sensor ✕

The Curve Max supports multipoint connectivity for up to two devices at once and can function as a headset for calls, with a mute function and voice prompts adding to its call-handling convenience. An in-line control panel lets users manage playback and other functions directly on the cable, and fast charging is included to reduce downtime. The earbuds do not feature ambient sound mode, in/on-ear detection, a find device function, or a body temperature sensor, and no travel bag is included in the box. The product comes with a one-year warranty.

Microphone:

number of microphones 1
has a noise-canceling microphone ✓

The Boult Audio Curve Max includes a single noise-canceling microphone, which helps reduce background noise during calls to improve voice clarity for the person on the other end.

Final Verdict

The Boult Audio Curve Max is a neckband-style wireless earbud that positions itself firmly around everyday practicality rather than audiophile performance. Its standout attribute is an exceptional 100-hour battery life paired with fast charging, making it a reliable companion for users who need consistent, long-duration audio without frequent interruptions. Multipoint connectivity, IPX5 sweat resistance, and an in-line control panel with mute functionality round out a feature set that serves commuters, active users, and frequent callers well. Those seeking advanced audio codec support or active noise cancellation will need to look elsewhere, but for users whose priorities are endurance, convenience, and a dependable wireless connection over Bluetooth 5.3, the Boult Audio Curve Max delivers a focused and functional package.

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