Symphonium Crimson VS 64 Audio U6t

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

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Symphonium Crimson and 64 Audio U6t use 4BA and 6BA driver setups respectively. Symphonium Crimson costs $1,500 while 64 Audio U6t costs $1,300. Symphonium Crimson is $200 more expensive. Symphonium Crimson holds a clear 0.6-point edge in reviewer scores (8.4 vs 7.9). Symphonium Crimson has significantly better bass with a 1.6-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 significantly better soundstage with a 1.3-point edge, Symphonium Crimson has significantly better details with a 2.1-point edge and Symphonium Crimson has significantly better imaging with a 1.5-point edge.

Insights

Metric Symphonium Crimson 64 Audio U6t
Bass 8.6 7
Mids 7.7 7.5
Treble 7.5 6
Details 8.1 6
Soundstage 8.3 7
Imaging 8.5 7
Dynamics 7 6.5
Tonality 8 6.8
Technicalities 8.2 5.9

Symphonium Crimson Aggregated Review Score

Average Reviewer Scores

Smirk Audio Jaytiss
Nymz Shuwa-T Precogvision
Z-Reviews Jays Audio

Average Reviewer Score:

8.4

Very Positive


64 Audio U6t Aggregated Review Score

Average Reviewer Scores

Jaytiss
Precogvision
Audionotions
Super* Review

Average Reviewer Score:

7.9

Strongly Favorable


Symphonium Crimson User Review Score

Average User Scores

Average User Score: n/a

Based on 0 user reviews

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64 Audio U6t 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!

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

7.1

Gaming Grade

A-

64 Audio U6t Gaming Score

Gaming Score & Grade

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

Gaming Score

5.1

Gaming Grade

C+

Symphonium Crimson Scorings

Average Technical & Tuning Grades

Average Tunign Grade

A+
  • Well-executed tonal character. No major flaws with good technical control. Smooth presentation works with multiple genres.

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 A
Excellent midrange with natural timbre and great detail retrieval. Vocals are forward and emotive with lifelike instrument reproduction.
Treble A
Excellent treble: airy, extended and well-controlled. Great micro-detail retrieval without sibilance or harshness.
Dynamics A-
Excellent dynamics with great contrast and speed. Transients are crisp and micro-details are clearly articulated.
Soundstage A+
Exceptional soundstage with holographic imaging. Creates a truly three-dimensional space where instruments float naturally around you.
Details A+
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

64 Audio U6t Scorings

Average Technical & Tuning Grades

Average Tunign Grade

B+
  • Generally enjoyable tonal character with some noticeable unevenness. Maintains listenability while showing room for refinement in frequency balance.

Average Technical Grade

B-
  • Satisfactory technical performance. Handles basic detail retrieval adequately in most tracks. Maintains reasonable cohesion in simpler arrangements.
Bass A-
Strong, well-defined bass with good texture. Delivers satisfying punch and rumble without overwhelming other frequencies.
Mids A
Excellent midrange with natural timbre and great detail retrieval. Vocals are forward and emotive with lifelike instrument reproduction.
Treble B
Good treble response - clear and detailed without fatigue. Well-extended with proper air and sparkle.
Dynamics B+
Good dynamic expression with solid impact. Handles volume contrasts well while maintaining good transient snap.
Soundstage A-
Excellent spatial presentation - wide, deep and tall. Precise instrument placement with clear separation in all dimensions.
Details B
Good resolution with clear articulation of nuances. Reveals recording nuances and maintains clarity in complex passages.
Imaging A-
Excellent imaging: precise and stable placement. Instruments occupy specific points in space with tangible positions.
Gaming C+
Fundamental left/right positioning with limited depth perception. Works for non-competitive gaming but lacks precision. Bad value-to-cost for gaming purpose - not recommended

Symphonium Crimson Reviews

Reviewed by: Z-Reviews

Z-Reviews 9.5 * score normalized

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 original ranking

Z-Reviews Youtube Channel

Reviewed by: Jays Audio

Jays Audio 9 Reviewer Score
S Tuning
S Tech
U-shaped/Slight V/W Shaped. Energetic treble. Great tech. Fun signature.

Jays Audio original ranking

Jays Audio Youtube Channel

Reviewed by: Nymz

Nymz 8.5 Reviewer Score
A+ Tuning
S- Tech
Great bass, holographic stage and top of the shelf dynamics. Probably my favourite rendition of a W-shaped tuning to this date. Treble might be spicy for some, but using Divinus Velvets (stock black) seem to help a lot.

Nymz original ranking

Nymz Website

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

Reviewed by: Shuwa-T

Shuwa-T 8.4 Reviewer Score
A+ Tuning
S- Tech
The bassier Helios with no sacrifices to clarity

Shuwa-T original ranking

Shuwa-T Website

Bass: S- Mids: A+ Treble: S- Soundstage: S- Details: S- Imaging: S-

Reviewed by: Precogvision

Precogvision 8 Reviewer Score
A+ Tuning
A+ Tech
Colored tonality done correctly with incredible bass and dynamics. Upper-treble can be slightly too zingy depending on source.

Precogvision original ranking

Precogvision Youtube Channel
Bass: S Mids: A+ Treble: A- Dynamics: A+ Details: A+ Imaging: A+

Reviewed by: Smirk Audio

Smirk Audio 7.9 Reviewer Score
A Tuning
A+ Tech
Excellent bass, dynamics, and resolution. Very large soundstage with great imaging. Mid/upper-treble may be too elevated for some.

Smirk Audio original ranking

Smirk Audio Head-Fi Profile

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

Reviewed by: Jaytiss

Jaytiss 7.8 Reviewer Score
B+ Tuning
A- Tech
Suffers from BA bass, and super Zingie Treble.

Jaytiss original ranking

Jaytiss Youtube Channel
Mids: A- Treble: A- Dynamics: C+ Soundstage: A+

64 Audio U6t Reviews

Reviewed by: Super* Review

Super* Review 9* * score normalized

Reviewed by: Audionotions

Audionotions 8.5 Reviewer Score
It's a step down from U12T in techs, yes, but it's still competitive in the price range. In exchange, tonality and timbre are much improved, which, IMO, is much more important. Imaging, separation, resolution, stage, and dynamics are excellent. Bass is deep and very well textured. Mids have great body. Treble is detailed and extended with great air while never being sibilant or harsh. Really easy to pop on and get lost in the music with. Warm and gooey in the best way possible. Lush, rich, soulful. Previously Owned

Audionotions original ranking

Website (Audionotions)

Reviewed by: Precogvision

Precogvision 7.1 Reviewer Score
A Tuning
B+ Tech
Warm, thick, and with excellent dynamics. U12t's tubby younger brother that could use more resolution.

Precogvision original ranking

Precogvision Youtube Channel
Bass: A- Mids: S Treble: A- Dynamics: A- Details: B Imaging: A-

Reviewed by: Jaytiss

Jaytiss 6.8 Reviewer Score
B- Tuning
C+ Tech
Nice graph, but images weird for an iem of this cost.

Jaytiss original ranking

Jaytiss Youtube Channel
Mids: B Treble: C+ Dynamics: B Soundstage: A-

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