Effect Audio King Arthur Aggregated Review Score
Effect Audio King Arthur Average Reviewer Scores
Average Reviewer Score:
2.5Negative
Subtonic Storm Aggregated Review Score
Subtonic Storm Average Reviewer Scores
Average Reviewer Score:
9.2Overwhelmingly Positive
Effect Audio King Arthur Details
Driver Configuration: 16BA
Tuning Type: Dark
Price (Msrp): $7,000
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Subtonic Storm Details
Driver Configuration: 5BA+2EST+2SLAM
Tuning Type: Neutral with bass boost
Price (Msrp): $5,200
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Effect Audio King Arthur User Review Score
Effect Audio King Arthur Average User Scores
Average User Score: n/a
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Subtonic Storm User Review Score
Subtonic Storm Average User Scores
Average User Score: n/a
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Effect Audio King Arthur Gaming Score

Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
1Gaming Grade
E-Subtonic Storm Gaming Score

Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
7.9Gaming Grade
AEffect Audio King Arthur Scorings
Average Technical & Tuning Grades
Average Tunign Grade
D-- Tonally jarring or fatiguing. Frequency clashes (e.g., piercing treble, bloated bass) make extended listening unpleasant. Poor genre adaptation.
Average Technical Grade
D-- Noticeably blurred or congested. Struggles with basic instrument separation; details are lost in simple tracks. Feels "flat" and one-dimensional.
Subtonic Storm Scorings
Average Technical & Tuning Grades
Average Tunign Grade
S- Exquisite technical mastery. Flawless frequency integration with captivating presentation. Sets new standards in tonal execution.
Average Technical Grade
S- Reference-tier precision. Effortlessly resolves micro-details, with holographic staging and lightning-fast transients. Masterful control even in the most chaotic tracks.
Effect Audio King Arthur Reviews
Effect Audio King Arthur reviewed by: Crin
A joke, both in price and sound. Nobody's laughing. Crin Youtube Channel
Subtonic Storm Reviews
Subtonic Storm reviewed by: Jays Audio
The best IEM I've ever heard. Best timbre. Super natural. TOTL tech. It's just good. That's all. Jays Audio Youtube Channel
Most IEMs inevitably introduce flaws that shatter musical immersion—be it harsh treble, shouty vocals, or unbalanced bass. These imperfections act as chains, binding the listener and preventing that elusive state of pure, uninterrupted freedom within the music. While the OG EJ07 came close, even it faltered on certain tracks, its forward vocals becoming a jarring distraction when pushed hard. The Subtonic Storm, however, shatters this pattern entirely.
Contrary to its name, the Storm represents the eye of the hurricane—a sanctuary of pure, effortless sound. It liberates the music from tuning flaws, presenting it naturally and tranquilly. There are zero distractions or attachments holding the listener back, enabling deep introspection and complete immersion, as if conversing directly with the singer or instrument. This profound, intangible quality—achieving that free state—is why it's considered the best IEM, offering unmatched resolution, separation, and imaging, albeit at an astronomical $5,000 price point.
Value-wise, the Storm is undeniably terrible; the KZ ASF ($250) gets you 80% there, and the Monarch MKII ($1,000) delivers 95%. It's a luxury item, justified only by its unique, unmeasurable ability to dissolve worldly distractions and forge total oneness with the music. Crucially, it's not for everyone: Bass heads, background listeners, or those enjoying J-pop/K-pop/EDM will find far better value elsewhere under $300. Only those deeply seeking musical transcendence, with ample disposable income, should even consider it. For everyone else, stay away—you simply don’t need it.
Subtonic Storm reviewed by: Gizaudio Axel
Exceptional resolution, neutral sound signature. Hard to drive. The most detailed IEM I’ve ever heard.Gizaudio Axel original ranking
Gizaudio Axel Youtube Channel
Subtonic Storm reviewed by: Precogvision
Easily at the top for resolution and dynamic contrast, accompanied by rigid transients and pinpoint layering. Precogvision Youtube Channel
Subtonic Storm reviewed by: Tim Tuned
Pros: The most extraodinary normal sounding IEM ever. Amazing all-around. Cons: big and heavy shell. Tim Tuned Youtube Channel
Subtonic Storm reviewed by: Smirk Audio
World-class resolution and layering. Extreme, almost exaggerated dynamics. Staging is large but not class-leading.
Subtonic Storm reviewed by: Shuwa-T
Strengths: Perfectly tuned, unparalled detail retrieval, staging, imaging, and proper holographic background as a cohesive package. Weaknesses: The price I guess. Comment: TOTL tuning with TOTL technicalities to boot.
Subtonic Storm reviewed by: IEMRanking AI

The Subtonic Storm delivers a balanced sound signature characterized by a generous sub-bass boost, neutral midrange, and an elevated, articulate treble response. Its standout feature is the implementation of proprietary SLAM drivers—custom balanced armatures handling separate sub-bass and mid-bass frequencies—which produce exceptional slam and texture rivaling dynamic drivers. The treble exhibits deliberate, controlled peaks between 5-15kHz, contributing to vividness without harshness, though some listeners may note a slight roll-off past 16kHz.
Technically, the Storm sets a high bar with class-leading dynamics, micro-detail resolution, and driver coherence across its hybrid array. Staging offers strong width and depth but lacks a cohesive center image. Ergonomically, the titanium shells are bulky and heavy, causing fatigue during extended use, and the stock cable is often criticized for stiffness. Additionally, its low sensitivity demands powerful amplification, limiting portability.
Effect Audio King Arthur User Reviews
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Subtonic Storm User Reviews
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