Detailed JBL C100SI Review

JBL is a popular audio device brand which brings to the market some of the best headphones and speakers. In this post, I will do a detailed review of the popular budget headphone JBL C100SI.

Let’s see why this model from JBL remains a popular lightweight in ear headphone choice in the market for nearly two years. Perhaps this review will reveal some useful insights for you to take the final decision in buying this model, without any more doubts in your mind.


The C100SI is a very light-weight In-ear headphone made with quality plastics. For the sake of comparison, if you have used the TL110 model from JBL, you will feel that the C100SI is not as sturdy as that. Still, that won’t be an issue as it is the lighter one.

jbl c100si reviewThe plastics are excellent and as such, it is advisable not to sleep with these on your ears. The reason is that it may hurt your ears if it gets pressed.

The 1.2-metre long cable is rubberised and is susceptible to tangling.

The ear tips come in three different sizes -Small(S), Medium(M) and Large(L). This should help in choosing a size that can fit your ear perfectly. A comfortable fit ensures a more pleasant user experience.

If you are a person who has been using On-ear or Over-ear headphones, then the earbuds may not be the thing for you. Well, that is just a general note of warning that you should know before you purchase any On-ear headphones. It is because such people won’t like earbuds being near to their ear canals. If you have small sized ear canals, then choose the Small(S) version of earbuds that come with the headphones.

jbl c100si review

Don’t forget to adjust the depth of insertion as well as the angle of the nozzle of earbuds, when inserting into your ears.

C100SI JBL sports a universal remote and microphone control button that helps in playing and pausing music easily along with answering the calls. This works well with both the Android and iOS devices. Though the mic is okay, the plastic enclosing is not of great quality.


The driver unit is the part of a headphone that helps in the conversion of electrical signals to audio signals. JBL C100SI comes with an advanced and powerful 9mm driver that delivers a wonderful audio experience.

It is more like drivers deliver the feel of the audio signals perfectly such that the audio just blends in with your mind.

jbl c100 si review

The sound isolation though not extremely good, is decent.

The impedance of C100SI is 16±3.2 ohms which means that it requires less power to deliver high audio levels. This isn’t something special as this is normal for headphones used with portable music players and mobile devices. A lower impedance also ensures a lesser battery drain of the device you have connected your headphone to.

Audio Equalization or EQ for short is the term used to describe the boosting and reduction of audio frequencies. JBL CS100SI responds to equalization well and produces well-defined bass across the low and mid audio levels. The highs are bright and don’t cause any noticeable piercing or sibilance.

Sound Experience

The CS100SI gives you elegant sound quality and a good bass which should make any bass-lover happy. If you ask a user who has been using this headphone for a while they won’t complain about its bass.

Both the low and mid audio levels feel good and don’t pose much of a problem for music lovers.

The sound leak is noticeable at mid to high volumes which means that the people near you will hear your music if you bring up the volume levels. But this happened to just me. My friend who tried with a different piece didn’t complain about such an experience with this model. So, I believe that might be an issue with the piece I have.

I conducted an analysis of the sound quality of the CS100SI by analysing over 5000 reviews online and discovered that almost 80% of the certified buyers were happy with the sound quality. Now, that is something you can look forward to as a positive for this amazing budget headphone.

During the sound experience analysis conducted on these 5000+ users, I noticed that most of them were very happy about the bass, the clarity of the sound and the noise cancellation. But, some of them were not happy about the volume levels. This might be an issue at higher volume levels only.

Although this is a small headphone, it may surprise you with its sound isolation quality. This helps to hear the different audio signals in the audio much clearer, giving an enjoyable experience.

I have mentioned the bass before, but it is something I would like to talk about more. You will like it for sure as it is very well balanced. Yeah, if you have got an amplifier, then it will perfectly boost the bass performance and deliver something bass lovers will enjoy a lot.

Other Details

c100 si jbl

  • Connector Type– Wired 3.5mm Single Pin
  • Product Dimensions – 6 x 3 x 17.5 cm
  • Weight – 49.9 g
  • Colours – Black, White and Red

Where To Buy JBL C100SI

An awesome budget In-ear headphone from JBL, the C100SI is definitely a headphone you can exchange your money for. It won't disappoint you for sure. Buying the headphone from the right seller online is what makes the difference as faulty pieces can be a nuisance. Luckily, this won't be an issue for you if the purchase is made from trusted e-commerce sites like the Amazon and Flipkart where you have hassle free return policies.
  • Good Bass Output
  • Light-weight and comfortable to use
  • Sound quality of low and mid levels
  • Simple to use universal button
  • Rubberized wire isn't tangle-free
Design - 8
Features - 8
Sound - 8.5
Value - 8

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