oBravo Ra 21 C VS 7th Acoustics Asteria

IEM Comparison: Expert & Community Scores Side-by-Side

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oBravo Ra 21 C and 7th Acoustics Asteria use 1DD+1AMT and 1DD+12BA driver setups respectively. oBravo Ra 21 C costs $7,000 while 7th Acoustics Asteria costs $3,800. oBravo Ra 21 C is $3,200 more expensive. 7th Acoustics Asteria holds a decisive 6.3-point edge in reviewer scores (2.5 vs 8.8).

Insights

Metric oBravo Ra 21 C 7th Acoustics Asteria
Bass 2.5 8.8
Mids 2.5 9.2
Treble 2.5 8.6
Details 2.5 8.6
Soundstage 2.5 9
Imaging 2.5 8.6
Dynamics 2.5 8.5
Tonality 2.5 8.9
Technicalities 3.5 8.4

oBravo Ra 21 C Aggregated Review Score

Average Reviewer Scores

Crin

Average Reviewer Score:

2.5

Very Negative


7th Acoustics Asteria Aggregated Review Score

Average Reviewer Scores

Precogvision IEMRanking AI
Bad Guy Good Audio

Average Reviewer Score:

8.8

Excellent


Reviews Comparison

oBravo Ra 21 C (more reviews)

oBravo Ra 21 C reviewed by Crin

Crin 2.5 Reviewer Score
D- Tuning
D+ Tech
Noted tuning improvements over its predecessor, but still a fundamentally flawed IEM design.

Crin original ranking

Crin Youtube Channel

7th Acoustics Asteria (more reviews)

7th Acoustics Asteria reviewed by Bad Guy Good Audio

2025-09-30
Bad Guy Good Audio 9.1 Reviewer Score
S Tuning
A+ Tech
As technical as a PMG SE but smooth like an RN6 (engaging mids) Flawless for my library

7th Acoustics Asteria arrives as a limited run of 77 units at around $3,800, presented in a numbered box with premium trimmings. The shells are described as the most beautiful seen in the hobby—shifting, almost bioluminescent blue caps with extended gold trim—and the fit is excellent thanks to a subtle wing. Under the hood sits a 10 mm dynamic driver plus 12 balanced armatures (latest-gen Knowles), with visible multi-tube routing and pressure relief to avoid insertion issues. The accessory suite feels purposefully upscale: a perfectly color-matched and supple cable (no gaudy branding), a structured case (noted as possible animal hide), Final Audio tips, additional tip sets, cleaning tools, stickers, and even a 4.4 mm to 3.5 mm adapter.

Sonically, Asteria is framed as reference-grade yet musical, with detail retrieval and resolution described as almost peerless. It handles a wide library with ease—classic rock, grunge, 90s hip-hop—and while some genres may benefit even more than others, overall performance is characterized as fault-free. Compared with similarly exclusive sets, it avoids the common “expensive but underwhelming” trap; the coherent tuning and technical chops deliver on high expectations without the need for caveats, making this a stunning aesthetic and acoustic package that feels every bit as special as its limited status suggests.

Bass: S Mids: S Treble: A+

Bad Guy Good Audio original ranking

Bad Guy Good Audio Youtube Channel

7th Acoustics Asteria reviewed by Precogvision

2025-09-17
Precogvision 8.3 Reviewer Score
S Tuning
A+ Tech
Pretty much the closest to a tonal panacea that I've heard only held back by the bass.

7th Acoustics Asteria prioritizes midrange and treble finesse with only one caveat: the bass isn’t the greatest, presenting a slightly BA-like character with a faintly “farty” mid-bass. The midrange is pure butter, driven by a gentle 2.5 kHz pinna rise followed by a subtle 3.5 kHz bump, keeping it forward yet smooth. A touch of presence around 200–300 Hz adds warmth, while the treble fixes Supernova’s lower-treble heat around 5–6 kHz and pushes extension past 15 kHz.

The result is a presentation that’s buttery yet detailed, with natural imaging and pinpoint precision that screams “godlike tonality.” Value is the sticking point: at roughly $3,800, the proposition isn’t as compelling as Supernova’s, and the overall performance feels closer to the ~$2,000 bracket. For listeners who prioritize tonality and imaging over bass texture and price efficiency, Asteria remains a compelling high-end choice.

Bass: A+ Mids: S+ Treble: S Dynamics: A+ Details: A+ Imaging: A+

Precogvision original ranking

Precogvision Youtube Channel

7th Acoustics Asteria reviewed by IEMRanking AI

2025-09-30
IEMRanking AI 8.9 Reviewer Score
S- Tuning
S Tech

The 7th Acoustics Asteria is a hybrid flagship built around a 10 mm dynamic driver for bass and twelve balanced-armature drivers covering mids through super-treble (5-way crossover), packaged in a CNC aluminum shell and paired with a bespoke LYRA cable. Retailers describe proprietary crossover and treble-loading implementations (EXP / ECHO) aimed at precise integration and high extension, and the run appears limited to 77 units. Pricing varies by market, but a common US MSRP is $3,800.

Tonally, Asteria targets a U-shaped balance: elevated, textured sub-bass, a mildly recessed midrange, and airy upper treble. Frequency-response references and dealer commentary support the emphasis on bass impact and treble “sparkle,” with vocals pushed slightly forward against a relaxed lower-midrange bed. This aligns with FR database traces showing boosted sub-bass and upper-treble energy relative to the center mids.

Technical performance is a core strength: imaging precision, separation, and macrodynamic slam are repeatedly noted, with stage size competitive among current flagships. The trade-off is a midrange that can feel slightly pulled back on timbre-critical content, and the ultra-premium price positions value as conditional on preferring this lively U-shape over neutral targets. Given its execution and cost, Asteria reads as a specialty end-game for listeners seeking visceral bass and airy treble without overt harshness.


Bass: S Mids: S- Treble: S- Dynamics: S Soundstage: S Details: S Imaging: S

oBravo Ra 21 C User Review Score

Average User Scores

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7th Acoustics Asteria User Review Score

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oBravo Ra 21 C Gaming Score

Gaming Score & Grade

  • The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.

Gaming Score

1.7

Gaming Grade

E

7th Acoustics Asteria Gaming Score

Gaming Score & Grade

  • The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.

Gaming Score

7

Gaming Grade

A-

oBravo Ra 21 C 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+
  • Limited resolution; finer nuances are masked. Soundstage feels narrow, and complex passages cause muddiness. Transitions lack finesse.
Gaming E
Compromised imaging significantly impacts gameplay awareness. Directional cues often lack accuracy or consistency. Bad value-to-cost for gaming purpose - not recommended

7th Acoustics Asteria Scorings

Average Technical & Tuning Grades

Average Tunign Grade

S-
  • Highly polished technical execution. Excellent frequency synergy creates an immersive experience. Enhances musical content.

Average Technical Grade

A+
  • Very competent with articulate presentation. Well-defined layers and precise imaging. Soundstage is immersive and handles dynamics well.
Bass S-
Excellent bass response - powerful yet controlled. Deep extension with authoritative slam while maintaining clarity.
Mids S
Reference-class midrange - perfectly balanced and hyper-detailed. Utterly natural reproduction with effortless texture and layering.
Treble S-
Superb treble: effortless extension with crystal clarity. Perfect balance of sparkle and smoothness with exceptional detail.
Dynamics S-
Superb dynamic range - powerful yet nuanced. Exceptional transient response with lifelike impact and subtle volume gradations.
Soundstage S
Reference-class soundstage: perfectly spherical presentation with infinite space. Utterly realistic instrument placement and venue reproduction.
Details S-
Exceptional resolution that uncovers the deepest layers. Retrieves even the most minute details while maintaining natural timbre.
Imaging S-
Exceptional imaging with holographic precision. Creates a palpable sense of physical placement with perfect positional stability.
Gaming A-
Good fundamental spatial awareness for most gaming scenarios. Handles basic positioning well but may lack nuance in complex situations. Bad value-to-cost for gaming purpose - not recommended

oBravo Ra 21 C User Reviews

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