Sennheiser HD 350BT

Pure Bluetooth over-ears with long battery life and great sound

The HD 350BT wireless over-ears from Sennheiser feature impressive battery life and support high-quality audio codecs with AAC format and aptX. You won’t have to sacrifice synchronicity or miss out on a high-quality sound experience with excellent bass reproduction when gaming or watching movies thanks to aptX Low Latency.

The ear cups tilt and swivel, as well as being foldable, making these Bluetooth headphones easy to transport, and they flexibly adapt to the shape of your head. The fit is not loose, but rather quite tight, making for a stable hold on the head even when on the move. Because the oval-shaped cups are angled, the luxurious leatherette upholstery fits snugly around the ears, helping to protect them from the outside world. However, the design does not offer much space which can lead to larger ears not being enclosed by the padding as intended; instead, it sits on top. Also, because of the rather tight fit, I would recommend these over-ears primarily for smaller to medium head shapes and ears.

In terms of energy, the handy size of these headphones offers a remarkable runtime of 45 hours at slightly raised levels, so that even long journeys are easy to handle. A full charge of the lithium polymer battery via USB-C connection takes a good two hours, a corresponding USB-C to USB-A charging cable is included with the accessories. However, the possibility of alternative wired use has been dispensed with, and there is no audio input available. The headphone’s usability via the free Sennheier Smart Control app also currently has room for improvement. One advantage is that there is the option of firmware updates and the EQ enables individual sound adjustments. However, these are rudimentary and cannot be saved, and there are no preconfigured presets to choose from. You do, however, have access to a function overview and the user manual.

Device control

Pairing the HD 350BT, which support Bluetooth standard 5.0 and multipoint connections with two devices simultaneously, is done by holding down the power button, which turns the system on and puts it in pairing mode. When used with various Android and iOS devices, there were no connection problems whatsoever, and the wireless connection proved to be extremely stable, particularly since ranges of up to 15 metres could be measured even within an urban environment. Top marks were also awarded for the speech intelligibility of telephone calls; they can be accepted and ended via the central remote using a movable button. This also controls playback at the touch of a button, while a vertical click is used to jump back and forward through tracks. However, for volume control and activating voice assistants, separate buttons are used. This has its disadvantages, as all controls and the USB-C connection are located on the lower right side of the ear cup. The buttons are small and quite close together, which at least to start with, makes orientation and operation difficult.


The HD 350BT are being advertised as having deep, dynamic bass, and this holds true. The well-rounded, slightly bouncy bass foundation has plenty of volume 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 my 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.

Maike Paeßens
11 months ago by Maike Paeßens
  • Rating: 4.25
  • Sound
  • Handling
  • Price/Quality
  • Function

From a sonic point of view, Sennheiser’s HD 350BT should appeal not only to adults but also to teenagers who prefer a strong bass response. At the same time, these Bluetooth headphones cover a wide range of applications and are recommended for listening to audio books and watching films thanks to their precise, clear voice reproduction. If you can do without the option of wired use, you will find these to be good, portable all-rounders with a very long battery life, which also offer a remarkably stable wireless connection with a usefully long range.

Technical specifications

  • Ear couplingOver-ear
  • Typeclosed
  • Transducer principledynamic
  • Frequency response (headphones)18 - 22.000 Hz
  • Sound pressure level (SPL)(1 kHz/0 dBFS): 108 dB
  • Weight without cable238 g

What's in the box

  • USB-C charging cable

Special features

  • available in black and white
  • BT codecs: aptX, aptX LL, AAC, SBC
  • BT version: 5.0
  • BT profiles: HSP, HFP, AVRCP, A2DP

6 Antworten auf “Sennheiser HD 350BT”

  1. Avatar Adnan says:

    How I will connect to the tv

    • Redaktion Redaktion says:

      If your TV does not have Bluetooth, you will need a Bluetooth adaptor. Connect it via mini jack to the headphone or line out of your TV.

    • Avatar Mark Dickens says:

      It depends on the telly. I have just replaced a Hitachi with a Toshiba, and both makes allowed the headphone volume to be controlled independently of the TV volume.

      My Sharp TV, however, did not have this built-in flexibility. TV volumes cut out when the headphones were in use.

  2. Avatar Frank Cleland says:

    Can you adjust the volume on the earphones and not adjust the volume on the TV?

  3. Avatar Ravi R says:

    Actually i am facing problem connecting my senheixer 350bt to another deivices.It is only connecting in the device i connected first.

    • Redaktion Redaktion says:

      Try deleting the Bluetooth pairing list of the headphones

      1.Deactivate Bluetooth on your smartphone.
      2.Switch the headphones off. To do so, press and hold the on/off button for 2 seconds.
      3.Switch the headphones on. To do so, press and hold the on/off button for 4 seconds.
      The LED on the headphones flashes red and blue. The head­phones are in pairing mode.
      4.Simultaneously press and hold the on/off button and the 3-way multi-function button for 5 seconds.
      The LED on the headphones flashes purple 3x. The pairing list is deleted. The headphones then stay in Bluetooth pairing mode.

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