KBEAR 03 VS ROSESELSA QuietSea II

Jaytiss original ranking

The KBEAR KB03 (Alkaid) is a budget tri-hybrid IEM using 1DD + 1BA + 1 bone-conduction driver, positioned around $55–69 depending on retailer; this configuration is unusual at the price and defines its core proposition . Tonally, available measurements and listening reports describe a mild V-shaped balance: elevated bass/treble with a modestly set-back midrange, aiming for broad appeal without sharp peaks . In practice this yields punchy low end and a clean, slightly lively top, while male vocals can sit a touch behind dense mixes—consistent with the tuning profile .

Technical performance is competitive for the bracket: imaging is orderly and separation is adequate, while the soundstage skews average in width and depth for an in-ear at this price (neither claustrophobic nor expansive) . It is also easy to drive—published figures around low impedance and moderate sensitivity translate to confident output from phones and dongles, with dynamics that are decent but not class-leading . Overall, the KB03 offers a value-centric package with a safe, energetic tilt and solid everyday technicalities, provided one accepts a conventional stage size and the V-shaped midrange set-back .

The ROSESELSA QuietSea II is a single-dynamic-driver (1DD) IEM built around a 10 mm diaphragm that combines a PEEK + carbon-copper dome and a dual-magnetic, dual-cavity motor. The brand highlights its ORBITA acoustic architecture and includes a modular 3.5 mm/4.4 mm OFC cable; current pricing sits around $63–70, with an MSRP of $69.99. These core specifications and pricing are documented on the product page and retailer listing.

Sonically, QuietSea II targets a neutral-warm balance: bass is modest with a mild sub-bass lift, mids are smooth and present, and treble stays non-fatiguing rather than sparkly. Community impressions describe it as “smooth” and “musical,” which aligns with a relaxed upper-treble and a focus on easy listening over analytical edge. These subjective takes are echoed in early YouTube coverage of the QuietSea II.

Technicalities are competent for the sub-$100 class: imaging is orderly with a stage of average width/depth, macrodynamics are restrained, and microdetail prioritizes smoothness over bite. Efficiency claims tied to the ORBITA design suggest easy drivability; in practice this type of tuning suits long sessions and casual music mixes more than critical, treble-centric listening. Given the price bracket, the overall value is solid, especially if a laid-back tonality is a priority.