Sennheiser IE900 VS Symphonium Crimson
IEM Comparison: Expert & Community Scores Side-by-Side
Sennheiser IE900 and Symphonium Crimson use 1DD and 4BA driver setups respectively. Sennheiser IE900 costs $1,500 while Symphonium Crimson costs $1,500. Symphonium Crimson holds a clear 0.6-point edge in reviewer scores (7.8 vs 8.4). Sennheiser IE900 has significantly better bass with a 1.4-point edge, Symphonium Crimson has significantly better mids with a 2.2-point edge, Symphonium Crimson has significantly better treble with a 1.5-point edge, Symphonium Crimson has better dynamics with a 0.5-point edge, Symphonium Crimson has better soundstage with a 0.8-point edge, Symphonium Crimson has significantly better details with a 1.1-point edge and Symphonium Crimson has significantly better imaging with a 2.5-point edge.
Insights
| Metric | Sennheiser IE900 | Symphonium Crimson |
|---|---|---|
| Bass | 10 | 8.6 |
| Mids | 5.5 | 7.7 |
| Treble | 6 | 7.5 |
| Details | 7 | 8.1 |
| Soundstage | 7.5 | 8.3 |
| Imaging | 6 | 8.5 |
| Dynamics | 6.5 | 7 |
| Tonality | 6.5 | 8.1 |
| Technicalities | 6.6 | 8.3 |
Sennheiser IE900 Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
7.8Strongly Favorable
Symphonium Crimson Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
8.4Very Positive
Reviews Comparison
Sennheiser IE900 reviewed by Jaytiss
7.1
Reviewer Score
Jaytiss Youtube Channel
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Price: $1,326
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Symphonium Crimson reviewed by Jaytiss
7.8
Reviewer Score
Jaytiss Youtube Channel
Sennheiser IE900 reviewed by Precogvision
7
Reviewer Score
Precogvision Youtube Channel
Symphonium Crimson reviewed by Precogvision
8
Reviewer Score
Precogvision Youtube Channel
Sennheiser IE900 reviewed by Head-Fi.org
8.9
* score rescaled + normalized
Symphonium Crimson reviewed by Head-Fi.org
8.3
* score rescaled + normalized
Sennheiser IE900 (more reviews)
Sennheiser IE900 reviewed by Super* Review
9*
* score rescaled + normalized
Sennheiser IE900 reviewed by Audionotions
8.5
Reviewer Score
Sennheiser IE900 reviewed by Crin
6.5
Reviewer Score
Youtube Video Summary
Sennheiser’s IE900 delivers a sub-bass–focused tuning with tight control and real tactility, but its trademark upper-mid recession (≈2–5 kHz) keeps vocals and instruments a step back. A pronounced 9–10 kHz lift adds sparkle and air; depending on tolerance, that energy can read either engaging or a touch sharp/sibilant. Technical chops are strong for a single DD—resolution and microdetail are genuinely competitive.
The sticking point is tonal balance and value. While the IE900 is refined and punchy, that blunted midrange character contrasts with its bright treble, creating a love-it-or-leave-it “blue cheese” appeal. Against peers—and especially Sennheiser’s own IE600, which fixes the mids while preserving similar resolution—the IE900’s $1,300 price starts to look tough.
In short: choose the IE900 for its clean sub-bass slam, crisp transients, and airy top if that treble profile hits the spot. If the priority is natural mids and better value without giving up much technical ability, the IE600 feels like the smarter pick—and the real redemption of Sennheiser’s IEM line.
Crin Youtube Channel
Symphonium Crimson (more reviews)
Symphonium Crimson reviewed by Z-Reviews
9.5
* score rescaled + normalized
Youtube Video Summary
Symphonium Crimson lands with a bang: a four–BA, four-way crossover design that somehow delivers epic energy without a dynamic driver. Tonality reads neutral-bright with thunderous sub-bass—not a basshead hump, but a slab of solid, deep extension that stays clean. Mids stay clear for vocals and strings, treble rises for sparkle and excitement, and the presentation spreads out like pulled-apart audio “shreds” across a big canvas. The effect is clarity, detail, and slam that feel bigger than the driver count suggests, making music and film scores straight-up addictive.
Technical notes matter here. Nominal impedance is a weirdly low ~6Ω, so source pairing can swing results; the set scales and sounds happiest on robust gear that can keep low-impedance loads stable. Despite the armature array, coherency stays intact, dynamics hit harder than expected, and volume headroom invites goosebumps. It’s not a “bass monster,” yet the sub-bass authority and lively treble make it exciting rather than polite, with imaging that feels wide and tactile.
Ergonomics are the gripe list: the short nozzle can challenge seal and the premium cable lacks a formed ear hook, encouraging twist and loosening—tip rolling (even reversed-orientation tricks) helps. Build is flashy—carbon-fiber shell, red inlays, metal case that’s too hefty for travel. Pricing sits around $1,500 (or $1,700 with 8-wire cable); for sheer fun, impact, and best-in-brand performance, the value argument holds. For all-day softness, something like Twilight stays comfier; for movies, big scores, and “wow” sessions, Crimson feels like a must-grab and arguably the best Symphonium to date.
Z-Reviews Youtube Channel
Symphonium Crimson reviewed by Jays Audio
9
Reviewer Score
Symphonium Crimson reviewed by Yifang
8.5
Reviewer Score
Symphonium Crimson reviewed by Nymz
8.5
Reviewer Score
Symphonium Crimson reviewed by Shuwa-T
8.4
Reviewer Score
Symphonium Crimson reviewed by Smirk Audio
7.9
Reviewer Score
Sennheiser IE900 Details
Driver Configuration: 1DD
Tuning Type: Warm, V-Shaped
Brand: Sennheiser Top Sennheiser IEMs
Price (Msrp): $1,500
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Symphonium Crimson Details
Driver Configuration: 4BA
Tuning Type: U-Shaped
Brand: Symphonium Top Symphonium IEMs
Price (Msrp): $1,500
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Sennheiser IE900 User Review Score
Average User Scores
Average User Score: n/a
Based on 0 user reviews
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Symphonium Crimson User Review Score
Average User Scores
Average User Score: n/a
Based on 0 user reviews
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Sennheiser IE900 Gaming Score
Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
5.5Gaming Grade
B-Symphonium Crimson Gaming Score
Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
7.2Gaming Grade
A-Sennheiser IE900 Scorings
Average Technical & Tuning Grades
Average Tunign Grade
B+- Expect a friendly tonal balance that could use polish but remains inviting. Great for casual listening, less so for purists.
Average Technical Grade
B+- An honest, middle-of-the-road performance preserves structure without chasing micro-detail. It's respectable for everyday listening sessions.
Symphonium Crimson Scorings
Average Technical & Tuning Grades
Average Tunign Grade
A+- Tuning feels refined, blending frequencies with convincing realism and engagement. Transitions between registers feel effortless.
Average Technical Grade
A+- It sounds refined and controlled, keeping instruments neatly separated with immersive staging. Busy arrangements remain neatly organized.
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