Koss KEB90 VS ROSESELSA QuietSea II
IEM Comparison: Expert & Community Scores Side-by-Side
Koss KEB90 and ROSESELSA QuietSea II are in-ear monitors. Koss KEB90 costs $70 while ROSESELSA QuietSea II costs $70. Koss KEB90 is $0 more expensive. ROSESELSA QuietSea II holds a decisive 2.5-point edge in reviewer scores (4 vs 6.5).
Insights
| Metric | Koss KEB90 | ROSESELSA QuietSea II |
|---|---|---|
| Bass | 4 | 6.5 |
| Mids | 4 | 5.9 |
| Treble | 4 | 5.7 |
| Details | 4 | 6.1 |
| Soundstage | 4 | 5.6 |
| Imaging | 4 | 6.2 |
| Dynamics | 4 | 6.7 |
| Tonality | 4 | 6.2 |
| Technicalities | 4 | 5.6 |
Koss KEB90 Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
4Unfavorable
ROSESELSA QuietSea II Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
6.5Mixed to Positive
Reviews Comparison
Koss KEB90 (more reviews)
Koss KEB90 reviewed by Super* Review
4*
* score rescaled + normalized
ROSESELSA QuietSea II (more reviews)
ROSESELSA QuietSea II reviewed by Jaytiss
6.3
Reviewer Score
Youtube Video Summary
ROSESELSA QuietSea II arrives as a dual-dynamic around $70 with playful packaging, a metallic shell, and a flat 2-pin socket. The shell is small and comfortable with a metal nozzle that grips tips well, but the stock fabric cable is notably microphonic. Accessory spread is generous (multiple tips, pouch, cleaning tools), though isolation is only moderate.
Sonically it’s a bass-forward tuning with thick, rich mids and pleasant upper mids, set against a treble that rolls off in the upper air. The measured curve shows an early bass rise (~200–250 Hz) that “cooks” parts of the lower mids; flattening that region and extending air would yield a more balanced presentation. Still, the set delivers fun, punchy impact and a decent sense of space for the price, reading as a bold, slightly V-shaped take.
Positioning within the lineup, it contrasts models with crisper top-end by offering a relaxed upper treble that suits treble-sensitive listeners and smaller ears, while others may miss sparkle and extension. Technicalities are appropriate for the bracket; the tuning is quirky but engaging and feels like a clear step up from the original. Overall, this earns a solid 3-star verdict: distinctive, enjoyable, and competitive—just not the pick for those chasing maximum air and detail.
Jaytiss Youtube Channel
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ROSESELSA QuietSea II reviewed by Web Search
6.6
Reviewer Score
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.
Koss KEB90 Details
Driver Configuration: n/a
Tuning Type: V-Shaped, Basshead
Price (Msrp): $70
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ROSESELSA QuietSea II Details
Driver Configuration: 1DD (10mm)
Tuning Type: Neutral, Warm
Price (Msrp): $69.99
Support our free service! Buying through our affiliate links costs you nothing extra:
Koss KEB90 User Review Score
Average User Scores
Average User Score: n/a
Based on 0 user reviews
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ROSESELSA QuietSea II User Review Score
Average User Scores
Average User Score: n/a
Based on 0 user reviews
No user reviews yet. Be the first one who writes a review!
Koss KEB90 Gaming Score
Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
4Gaming Grade
C-ROSESELSA QuietSea II Gaming Score
Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
5.8Gaming Grade
B-Koss KEB90 Scorings
ROSESELSA QuietSea II Scorings
Average Technical & Tuning Grades
Average Tunign Grade
B- A mostly enjoyable signature keeps things listenable despite a handful of quirks. It handles most playlists without major complaints.
Average Technical Grade
B-- The presentation is steady if unspectacular, holding onto essential details when the music stays simple. Fine details occasionally slip through the cracks.
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