Sennheiser CX 400BT True Wireless Earbuds Review

Sennheiser CX 400BT Premium Sound Quality At An Affordable Price...

by Bestwireless
sennheiser cx 400 bt true wireless earbuds

Earbuds technology is more improved. They are made to be more comfortable and to offer quality sound. Sennheiser is among the companies that are known for manufacturing quality sound devices. Moreover, the company has existed for over 75 years. Thus it has enough experience in satisfying customer needs. This company makes headphones, earbuds, and more other devices.

  • Offer a comfortable fit
  • Has a compact charging case
  • Features custom controls
  • Has Bluetooth 5.1, stable & reliable connection
  • Offers 20hrs of playtime
  • Support Aptx-low Latency
  • Has no ANC feature
  • They are not waterproof

One of the earbuds made by Sennheiser is CX 400BT which will be released on 15 September 2020. It’s an in-ear wireless headset that has a small design and offers great sound. Additionally, they are made to offer a snug fit to different ear sizes. Thus, making them a perfect selection in the gym or for travelers. Sennheiser CX 400BT costs around $99.99 at the amazon store. Below is a detailed review of  CX 400BT True Wireless Earbuds.

Sennheiser CX 400BT Design:

sennheiser cx 400bt true wireless earbuds in-ear headphones

Sennheiser CX 400BT True Wireless Earbuds are either in black or white color. It also has a square shape design. They are truly wireless earbuds thus, there will be no worry about cable tangling. Moreover, these earbuds have an ergonomic design. This makes it suitable for all-day wearing. This makes it suitable when listening to a long playlist or a lively audiobook. Additionally, it’s also best for people that love to make a phone call.

Sennheiser CX 400BT comes with a compact charging case that’s easier to move around with. It has a smooth finishing with well-curved corners making it comfortable. The earbuds are placed and taken out from the charging case. Moreover, Sennheiser CX 400BT has a company’s logo on the outer side making them distinct. These earbuds have a blue light to show connection status.

These earbuds are labeled with the letter R for use on the right side & L for use on the left side. With these earbuds, you’ll have customizable touch controls on both earbuds. This will make it simple to relish a smarter & connected lifestyle. Its touch-sensitive interfaces offer quick access to voice assistants (Siri & Google Assistant).

Sound Performance:

Sennheiser CX 400BT is made to offer the best quality sound. Moreover, with either an Android or iOS device you will always have to enjoy these earbuds. Additionally, it has a wide range of audio-codec support. They include AAC, SBC & aptX which offer premium sound. With 7mm dynamic drivers & an in-built equalizer will immerse you in amazing audio quality.

The low ends offer a soft and natural response that lacks in-depth. Additionally, it has a more restrained bass that responds to the dynamic range. Moreover, these earbuds don’t have a clear low-mid boost but the mid-range remains flat in most parts. The vocal registers are clear & concise with the best separation & balance well using complicated instrumentals. It works well with podcasts & audiobooks. You can boost the highs with the help of EQ in smart app control.

Noise Cancellation:

Unfortunately, Sennheiser CX 400BT doesn’t have active noise cancelling feature. But, you will have a passive noise-cancellation with the help of the silicone tips. They will seal your ears blocking some of the ambient sounds. Additionally, these earbuds come with an in-built mic. They will assist you in making clear phone calls.

Battery Life:

Sennheiser CX 400BT comes with a Lithium-ion battery. Moreover, the earbuds will offer you a continuous playtime of about 20 hours of battery life. That is 7-hours on a single charge & 13hrs extra with the charging case. The charging case is recharged using a USB type C cable. Additionally, the earbuds are auto-charged once they are placed in a charging case.

Moreover, 1.5hrs will charge these buds completely. Furthermore, with a quick charge of 10 minutes, you will have a playtime of 1hr. For efficient charging, you need to wipe the charging contact. But, the battery life will depend on usage and it decreases with time.


Sennheiser CX 400BT True Wireless

CX 400BT has an ergonomic design that offers a snug fit. Additionally, it comes with four pairs of ear tips of different sizes. They include Xsmall, small, medium, and large. Additionally, the ear tips are made of soft silicone material. Thus no pain will be experienced in your ears. These earbuds are lightweight thus, you will be able to use them for long hours with no fatigue. Moreover, its charging case has a compact design making it easy to carry.

Sennheiser CX 400BT Offered Latest BL Version:

Sennheiser CX 400BT is wireless. They are fitted with Bluetooth version 5.1. This ensures that you will have a stable & reliable wireless connection. Furthermore, this latest Bluetooth version offers superior bandwidth quality & range. Additionally, it will also support the latest CODECs like aptX, SBC, and AAC.

You will be able to pair CX 400BT with up to 8 distinct Bluetooth devices. Moreover, CX 400BT will store & recall these pairings.

Ease To Use:

CX 400BT comes with customizable touch controls. With a touch, you will be able to manage music, volumes, and voice assistance. Additionally, one can make & receive calls via tapping the right or left buds. Additionally, the smart control app will allow you to completely remap controls.

What’s In The Box?

  • CX 400BT Earbuds
  • Silicone ear tips sets (XS/S/M/L)
  • Charging case
  • USB-C cable
  • User and safety guide




CX 400BT Earbuds offers premium sound quality courtesy of 7mm dynamic drivers. Moreover, it also offers an optimal comfort and it comes with customizable touch-controls. This will give you the best listening experience than other true earbuds are on the market. Its all-day battery life will allow you to enjoy music for long hours. Internal sound EQ will allow you to have customized sound. Sennheiser CX 400BT comes with Bluetooth 5.1 tech which is the latest. Both earbuds & charging cases weigh 49g. A single earbud weighs 6g thus lightweight.

Related Posts