Mr. Klean Cleans up: Kefine's Refined Sound Evolution. The Kefine Klean IEM steps forward as a grown-up iteration of the popular Delci model. It retains the playful energy that made the Delci a hit, but adds a layer of polish, resulting in a more balanced, refined sound that suits listeners looking for both excitement and control. In this review, we'll explore how the Klean’s sound profile, build quality, and technical abilities stack up, offering insights for those who crave an IEM that bridges excitement with precision. Whats in the box? here is my quick unbox video: I use the silver tuning nozzle for this sound impression. Subbass: Right off the bat, the Klean introduces a more controlled and refined subbass compared to the Delci. It's tighter, less boomy, but still present enough to add weight and depth to tracks that call for it. Where the Delci could feel a little loose at times, the Klean pulls things together, offering a more focused, impactful rumble that integra