Colarad is a Chinese brand that produces in-ear monitors (IEMs) and earbuds. I would like to thank Colarad and Penon Audio for the review unit of Colarad C2. You can purchase the C2 from .



  • Impedance: 16 Ohm
  • Sensitivity: 105 dB
  • Frequency response 20Hz-20KHz
  • Cable Length: 1.2 m
  • Plug: 3.5mm rhodium-plated

Unboxing & Accessories

The C2 comes in a brown package that contains a soft carrying case which contains the iem and cable wrap. There is also a small box for 2 pairs of silicone tips (S, L) and 1 shirt slip.


IEM Build & Design

The C2 has a red shell with L & R markings on the left and right side respectively. There is a silver vent facing outwards. The nozzle is straight with metal mesh for earwax prevention. There is strain relief.



Cable Build & Design

The cable is decent and it is red in colour. There is no chin slider. The y-splitter acts as a microphone too. The jack is 3.5mm straight rhodium plated and has a black housing with a rubbery surface.


Sound Analysis


The C2 has decent sub-bass extension and the rumble is moderately quick. The bass note is being presented moderately without much authority. The decay is rather fast. Bass texture is decently smooth. The mid-bass has moderate quantity and the slam is not hard at all. The bass takes on a conservative approach.


The midrange is quite laid-back. The details retrieval is decent. The lower mids has a moderate amount of body to it and it is enough to tackle male vocals. The upper mids is not forward and there is a lack of crisp. Female vocals are expressed in a smooth manner. The control on the vocals is decent. The C2 is able to tackle male vocals better than female vocals.


The treble is extended decently and there is no sibilance and harshness. There is a moderate amount of air and there is lack of sparkle. The treble has a decent control. The definition is rather decent too. The nature ensures a fatigue-free listening.


The C2 has a decent soundstage for both the width and depth. The width is not very wide and it gets congested when tackling busier tracks. Layering and separation is decent.


The C2 is a decent iem with a polite sound. It is able to express the music in a smooth manner with decent details retrieval. In addition, it has an interesting design for the y-splitter acting as a microphone too. The Colarad C2 is good to use during commute and for picking up calls.