Brainwavz Audio is Hong Kong based company that specializes in making in-ear monitors (IEMs), headphones and other audio products. I would like to thank Brainwavz Audio for the review unit of Koel. At the moment, you can purchase the Koel from Brainwavz .



  • Drivers Configuration: 1 Balanced Armature
  • Impedance: 30Ω
  • Frequency Range: 16 Hz – 22 kHz
  • Sensitivity: 105 dB at 1 mW

Unboxing & Accessories

The Koel comes in a grey package with a white protective cover that sports the brand name and model name. Inside the grey package, there is a rectangular semi-hard carrying case with circular edges. The case is black and red in colour. After unzipping the case, there are the iem, MMCX 3.5mm cable, 6 sets of silicone ear tips (S M L), 1 set of Comply™ foam tips T-100, shirt clip, velcro cable tie and instruction manual.



Page 2: IEM Build & Design, Cable Build & Design