HD 450BT

"The sound is overall good for its price, but if I could describe the problem with these headphones in 2 words, they'd be *Consistency and Snares.*"

Sound quality is generally considered decent for the price, with good bass and clear mid-highs, but some users note muddy or saturated bass and a lack of treble.

"My biggest gripe is one that a lot of people mentioned about these headphones; comfort. ... The clamp force is just ridiculously strong though... the band is hurting my head and the pressure is hurting my jaw and the parts of my skull behind my ears."

Comfort is a major issue, with users complaining about strong clamping force, poor padding, and ear fatigue after short periods, though some find them comfortable with glasses.

"As it will be the case with most of this review: it's not great, but it doesn´t suffer from cheap build quality problems. Altought it's made mostly out of plastic, it almost doesn´t creek"

Build quality is described as not great but functional, mostly plastic with minimal creaking, and a weight primarily from electronics rather than premium materials.

"Also I get very bad sound quality when connecting into any call (discord, teams) and using the headphones build in mic."

Users report very bad sound quality when using the built-in mic for calls.

"I was able to receive audio, but the audio quality is really bad. Sound is hollow, like something with damaged or unsupported earphones."

Connectivity is generally functional with aptX LL support noted as a positive for mobile gaming, but some users experienced issues with wired connections and Bluetooth delay.

"Here the HD 450BT delivers exactly what I’d expect from a Sennheiser audio product. And that is to say: outstanding."

Reviewers consistently praise the sound quality, describing it as outstanding, detailed, clear, and well-balanced with good bass and highs, suitable for various music genres.

"The earcups of the HD450BT are rather small – not quite small enough to be on-ear, but small enough not to accept the entirety of my ears into the opening."

Multiple reviews highlight discomfort due to small earcups that don't fully encompass the ear, and a lack of padding on the headband, making them unsuitable for long listening sessions or larger ears.

"Sennheiser claims that the HD 450BT can deliver up to 30 hours of playback time with ANC-on on a single charge. The battery life on these is excellent."

The battery life is consistently praised, meeting or nearly meeting the advertised 30 hours of playback with ANC on, which is considered excellent and sufficient for most users.

"Compared to the Momentum 3 Wireless headphones, the build of the new cans feels less premium and less sturdy: the plastic construction could even be described as feeling flimsy."

The build quality is frequently criticized as flimsy, plasticky, and less premium than expected for the price, despite being lightweight and foldable.

"Can you use this headset for phone calls in the same way you can use a spoon to dig holes: it gets the job done, but most would grab a shovel if given the chance."

The microphone quality is described as only 'okay' and that it 'gets the job done,' with one reviewer noting that the dual beamforming microphones amplify bass notes, deviating from typical headset microphones.

"The learning curve is real, folks! I’ve been using these for three weeks now and I still fumble my way to the button I need."

Features like Bluetooth 5.0, aptX Low Latency, and USB-C charging are appreciated, but the button controls are consistently criticized as finicky and difficult to use, and the app offers limited functionality.

"I find these cans offer a very rich and immersive sound adventure. The stereo seperation is cavernous without any sense of enclosure."

The sound quality is generally well-regarded, with users appreciating its accuracy and preferring it over more bass-heavy alternatives, though some find it lacking for the price.

"It's true about the narrow ear padding, and it does get a bit hot and cramped... but I find them really comfortable and they certainly don't hurt my ears like on-ear headphones do"

Comfort is a mixed bag, with many finding the narrow ear padding hot and cramped, though some with smaller ears find them acceptable, and clamp force reduces over time.

"Battery life is like the day I bought it."

Battery life is consistently praised as excellent, with users reporting it lasting for years and holding up like the day they were bought.

"Good review, i was wondering how the volume output was? from my understanding the 350bt don't go real loud, i was hoping these will be louder then the 350bt."

Build quality is considered decent for the price point, though some users have experienced mechanical issues like clicking sounds or plastic hinge failures over time.

"The customers can hear me so clearly and I them."

Call quality is surprisingly good, with users reporting that customers can hear them clearly, even when using the headphones for work calls.

"While you can technically have two devices connected to the headset via Bluetooth, I find that switching between the devices isn't always so seamless, especially when the two devices are in close proximity."

While features like aptX Low Latency are appreciated, users note issues with seamless Bluetooth device switching and the inconvenience of a non-standard audio jack.