Kefine Klean VS ooopusX Op.24

Fresh Reviews original ranking

The Kefine Klean offers a versatile listening experience through its interchangeable nozzle system, with the silver filter providing a warmer, smoother profile while the black filter delivers enhanced treble clarity and presence . Its 10mm DLC diaphragm dynamic driver produces a balanced sound with natural mids and well-textured bass that avoids excessive boominess, though mid-bass can occasionally lack definition .

Comfort is a highlight, with the CNC-machined metal shells sitting ergonomically in most ears for extended sessions, though nozzle edges may cause minor irritation for some . Technical performance includes a moderately wide soundstage and competent imaging, though complex tracks can reveal limitations in separation and transient speed compared to higher-tier models .

The ooopusX Op.24 is a budget hybrid with a 2DD+4BA array and a physical two-position tuning dial that switches electrical load between roughly 15Ω and 27Ω, indicating distinct filter networks for its modes. Core specs are ambitious for $49.99 (quoted sensitivity 127 dB/Vrms, 10–40 kHz FR), and the housings remain lightweight for long sessions. Fit and ergonomics are straightforward, reportedly ~5.2 g per side, which helps stability and isolation in daily use.

Tonally, Op.24 targets a Harman-style balance with a safe mid/treble contour and modest sub-bass lift; independent reviews describe consistent but unadventurous resolution, with the dial providing small, audible shifts rather than wholesale retunes. Technical performance is competent for the class—detail retrieval and imaging are respectable, while stage size and microdynamics are average—placing it as a solid value pick rather than a segment disruptor. Overall, the package reads as a pragmatic daily driver with useful tuning flexibility rather than a specialist, aligning with assessments from multiple third-party reviewers.