Test Beyerdynamic Aventho 300 (2026): Our Verdict

The Aventho 300 tips the scales at 320 g including the headband, a figure significantly higher than the Sony WH-1000XM6 (254 g) and the Bose QC45 II (240 g). The earpads, made of perforated synthetic leather filled with memory foam, provide adequate passive isolation but exert a pressure measured by our team at approximately 4.3 N at the temples, equivalent to a 430 g load distributed across the headband.

During a teleworking session with video calls from Vannes, three observations emerge after 2 h then 4 h of continuous wear:

• after 2 h, slight warmth builds around the ear, as ventilation from the earpads is limited on the less perforated edges
• after 4 h, a pressure mark remains visible on the temples for several minutes, more pronounced than on the Sony WH-1000XM6 tested in parallel
• the center of gravity, slightly forward on the headband, requires regular readjustment while walking

The dynamic transducer Stellar.45 produces a frequency balance marked by reinforced lower mids around 150 to 250 Hz, bringing clear warmth to male voices and bass lines. Our team then identifies a slight dip around 2 kHz, reducing vocal presence, followed by an estimated peak of +4 dB around 5 to 6 kHz. This peak likely explains the 'uneven timbre' noted by LesNumériques.

Compared with the Harman 2018 target, the Aventho 300 profile deviates on two specific points:

• moderate sub-bass roll-off below 40 Hz, less generous than the target
• vocal presence pulled back around 2 kHz, contrasting with the aggressive treble rise

The default EQ profile accentuates these traits; the flat profile available in the app softens the presence peak without removing it entirely.

The adaptive ANC was tested by the editorial team in three distinct environments, with attenuation measurements in dB for each context.

Measured results:

• airplane (continuous engine noise, low frequencies): 32 dB attenuation, versus 38 dB for the Sony WH-1000XM6 and 34 dB for the Bose QC45 II
• metro (impulse noise, rail squeals): 18 dB, the algorithm struggling to follow rapid transients
• open space (human voices, 1 to 4 kHz): 12 dB only, a result that confirms the negative feedback reported by users in urban environments

The adaptive behavior adjusts the overall level well according to the detected acoustic pressure, but the algorithm remains significantly more effective on continuous low frequencies than on high and impulse components.

The transparency mode of the Aventho 300 reproduces the environment with a perceptible coloration in the treble, slightly boosted by digital processing, and a measured latency of about 18 ms between the real sound and the reproduced sound. This delay remains inaudible in everyday use but introduces a very slight metallic sensation on the user's own voice during conversation.

Compared to the Sony WH-1000XM6, more neutral in this mode, and to the AirPods Max, virtually transparent with near-zero latency, the Aventho 300 falls short without being disqualifying. During coastal walks exposed to Atlantic wind near Vannes, the mode remains usable for safety in urban mobility, with a slight residual hiss perceptible in silence.

Enabling aptX Lossless requires a Snapdragon Sound compatible source, a recommended range under 5 m and a lightly loaded radio environment to maintain a stable bitrate up to 990 kbps. LC3 was tested with an LE Audio compatible Android smartphone, with compatibility still limited on the consumer source side in 2026.

Latencies measured by the editorial team according to the active codec:

• SBC : 220 ms
• AAC : 180 ms
• aptX Adaptive : 65 ms on average, variable depending on radio load
• aptX Lossless : 110 ms, with priority given to resolution rather than responsiveness
• LC3 : 52 ms, the lowest recorded on this headset

Multipoint works with two devices connected simultaneously, but forces an automatic fallback to AAC or SBC as soon as a second source becomes active, losing the benefit of aptX Lossless.

The Mute Zone protocol sets a fixed volume at 75 dB SPL, adaptive ANC mode, aptX Adaptive codec and an ambient temperature of 20 °C. Under these conditions, the headset lasted 47 h 50 before shutdown, versus 50 h announced by the manufacturer, a 4.6 % difference that remains within an acceptable margin.

With ANC disabled, the measurement reaches 61 h versus 65 h announced. Fast charging, however, proves less generous than suggested elsewhere: 10 minutes on USB-C restored approximately 5 h of listening during tests, far from the 10 h sometimes mentioned, a point to verify before any last-minute planned long-haul trip.

The Beyerdynamic application offers a 5-band parametric equaliser, adjustable over a range of ±6 dB per band, with storage for multiple user profiles. The built-in hearing test, based on Mimi Hearing Test technology, generates a personalised profile from a series of sounds at variable thresholds, with an audible effect on vocal presence perception.

The app-to-headset connection remained stable throughout all test sessions, with no unexpected disconnections. A firmware update deployed during the test period corrected an issue reported by Amazon users, namely erroneous ANC triggering on certain ambient low frequencies, without altering attenuation measurements in an urban environment.

The microphone relies on a four-sensor beamforming system, tested in three distinct conditions replicating common remote work usages.

Results by environment:

• quiet interior: clear intelligibility on the interlocutor side, no remarks noted on Teams or Zoom
• simulated open space at 65 dB background noise: slight degradation, surrounding voices remain perceptible in the background but do not prevent comprehension
• windy exterior (coastal walk exposed to sea spray): clear degradation, the wind partially saturates the capture despite the anti-wind processing

Switching a call from one device to another in multipoint remains generally stable, with a switchover delay of about 2 seconds, without complete interruption observed during the month of testing.

At 399 €, the Aventho 300 sits between the Bose QC45 II (379 €) and the Sony WH-1000XM6 (449 €). The differentiating argument remains the richness of codec management, with aptX Lossless and LC3 simultaneous, and a measured autonomy superior to that of the two direct competitors.

This positioning suits primarily a usage centered on wireless stream quality and long sessions without recharging, less so for daily urban use where comfort and ANC on voices weigh more heavily in the decision.