Review of Sennheiser HD 350BT Headphone

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Few people brag about how good their $100 headphones sound. In fact, a good chunk of headphones in this price bracket sound pretty mediocre, but Sennheiser doesn’t forsake its decades-old legacy with the Sennheiser HD 350BT. These Bluetooth headphones sound excellent and give more premium headsets plenty to chew on. Let’s find out if sound quality alone is enough to make the HD 350BT worth your money.

Review of Sennheiser HD 350BT Headphone

1. Design

Sennheiser HD 350BT

The HD350BT is built with predictably cheap materials, mostly plastic and rubber. Visually, it’s unsurprising, going with most of the same visual cues as Sennheiser’s other recent Bluetooth headphones. No, Sennheiser hasn’t created the “hot new look of 2020” with these headphones – instead, it carries the utilitarian profile that Sennheiser is mostly associated with. You may like it, you may not. One thing’s for sure, though: these headphones are available in white and black.

When it comes to fit, I have to say that the HD350BT didn’t impress me. The headband, with its scant rubber padding, tended to make contact with a single point of our skull, meaning that while it was never too bothersome, it also didn’t “disappear” the way some headphones do after some time. More importantly, though, the earcups were simply too small for our ears. For me, these occupied some middle territory between an over-ear and an on-ear headphone – not the best place to be. It really is just as Mr. Miyagi said.

To somewhat worsen things, I noticed that the sound changes quite a bit with a proper seal – which, for me, as someone with (I guess?) large ears and thick hair, was difficult to accomplish without holding the earcups against our head.

Essentially, if you have big ears, you’re going to want to try these out before you pull the trigger.

2. Sound Performance

Sennheiser HD 350BT

The HD 350BT is being advertised as having deep, dynamic bass, and this holds true. The well-rounded, slightly bouncy bass foundation has plenty of volumes and considerable depth, which makes listening to bass-heavy music a lot of fun. At the same time, the low-frequency range does not appear overloaded, but compact, well defined, and wonderfully agile. Very successful indeed! The mid-range reproduction is just as precise and with a pronounced clarity; vocals sound pleasantly lively and authentic, and movies and spoken content also benefit from this feature. In our opinion, the trebles seem to be tuned quite softly, which is an advantage for sensitive ears as even at high levels there is no biting or harsh sound. Nevertheless, the high-frequency range is present, even if there is a subtle fall-off. Overall, the price/sound ratio of these headphones is extremely good, especially since high-quality audio codecs are available for both iOS and Android devices. Also, the sound stage appears very clean and does not impart any feeling of narrowness, rather it provides a sense of spaciousness and openness.

3. Battery

Sennheiser HD 350BT

We subjected the Sennheiser HD 350BT to a constant 75dB(SPL) output, and they lasted 33 hours, 49 minutes on a single charge. This exceeds the official 30-hour battery life and is far better than most wireless headphones. Just like the Sennheiser HD 450BT, the HD 350BT doesn’t support fast charging, so you will need to set aside the full two hours to charge the headset via USB-C.

4. Connectivity and the Phone app

Sennheiser HD 350BT

The Sennheiser HD 350BT Wireless supports Bluetooth 5.0 which makes connectivity easy. We have had problems with other headsets – especially when we connect them to multiple devices – but the HD 350BT was great. It connected to any device without us having to disconnect it from the old one.

The headset also supports the Sennheiser Smart Control App. This is a free application available on both iOS and Android phones. The app is perfect for controlling the headphones. It provides a way to know the battery and to customize the sound. We personally think the sound is great straight out of the box, but it is good to know that the option is available.

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While the HD350BT won’t appeal to those looking to blast pop music, nor those looking for a headphone with a warm, meaty, or intimate sound, it very much appeals to us. We wouldn’t encourage you to buy it completely blind, especially when it comes to fit, but if you’re looking for a wide soundstage and an airy, clear sound signature, the HD350BT is the pair to get. For $100, it can’t be beaten.