This is JBL C100SI, one of the cheapest entry level wired IEM. The package comes included with a total of 3 ear-tips size. Latest pricing here Amazon/Shopee/Lazada. | Calvin Pixels | JBL C100SI Review | Cheapest JBL IEM Any Good??

The JBL C100SI is brought to life by a pair of 9 mm Neodymium Dynamic Drives. The cable length is 1.2 meters long and it is a thin type. The plus point of this earphone is that the cable doesn’t touch the face in normal setup. The control center is located on the Y-splitter which houses the microphone and the multi-button function for your call and media control. For the music playback, you have to press the button 2 or 3 times quickly for music selection skipping. You do have to hold the microphone near you mouth and talk into since it located around the chest area, kinda low. The sound isolation is acceptable but not the best for this IEM despite the sound tube is around 0.5 cm long.

TECHNICAL SPECIFICATION | Calvin Pixels | JBL C100SI Review | Cheapest JBL IEM Any Good??

Technical Specification:
Rated power: input 3 mw
Cable length: 1.2 m
Audio Specifications
Frequency range: 20-20 khz
Impedance: 16±3.2 ohms
Driver sensitivity: 100±3dBSPL, 1mw
Maximum: SPL 5mw | Calvin Pixels | JBL C100SI Review | Cheapest JBL IEM Any Good??


Tiaan – Be Ok (Low bass frequency)
The low bass frequency is superbly energetic and notable, you can feel the air pressure booming in your ears. It doesn’t eat into the vocals and it almost has some distortion, but luckily JBL manage to control it. The subtle bass vibrations fade smoothly and the low bass frequency is well bodied. However the low bass does overpower the vocals most of the time.

Pia Mia – Do It Again (Standard bass)
The bass is energetic and present, you can feel the air pressure. The bass fades smoothly with a long drag especially at the 2:05 mark. However you can feel the vibrations just a tiny bit.  The bass does slightly overpowers the vocals, but there is a clear separation between the two. It should be noted that the bass is well bodied and the EDM tones feels safe or pushed back.

Violinder – Raindrops (Instrumental)
The piano and violin tone sounds right and natural, but leans closer to the warm-sounding type not the crystal-clear. Personally I prefer crystal-clear type. In my opinion it needs more shine at the highs and the tone does sound slightly half-hearted. Furthermore, the bass/drums slightly overpowers the Piano/Violin in term of audible levels but there is clear separation between the two.

Pentatonix – See Through (High Pitch Vocals / Group Separation 5th volume)
Mitch Grassi’s hi-pitched-male Tenor vocals perform decent but lack a lot of shine at the high frequency and it  feels flat. Each singer barely can be identified easily and is slightly muffled. Every diction and pronunciation is crystal clear. However, the vocal beat-boxing, echoing and humming is good but it does overpower Mitch Grassi’s vocal in the song. | Calvin Pixels | JBL C100SI Review | Cheapest JBL IEM Any Good??
with and without the eartips


The JBL C100SI does perform well from the low to low-mids frequency, it is great for bass heads. Then again, this is 9 USD IEM and it does perform well for bass but vocals suffer a bit if you’re an acapella person. You get what you pay for, we recommend the 1More Piston or the KZ ZS5 IEMs that we review ealier for better audio experience.


Amazon | Shopee (MY) | Lazada (MY/SG)