Sennheiser IE900 VS 64 Audio U6T

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

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Sennheiser IE900 and 64 Audio U6T use 1DD and 6BA driver setups respectively. Sennheiser IE900 costs $1,500 while 64 Audio U6T costs $1,300. Sennheiser IE900 is $200 more expensive. 64 Audio U6T holds a slight 0.1-point edge in reviewer scores (7.8 vs 8). Sennheiser IE900 has significantly better bass with a 3-point edge, 64 Audio U6T has significantly better mids with a 2-point edge, Sennheiser IE900 has better soundstage with a 0.5-point edge, Sennheiser IE900 has significantly better details with a 1-point edge and 64 Audio U6T has significantly better imaging with a 1-point edge.

Insights

Metric Sennheiser IE900 64 Audio U6T
Bass 10 7
Mids 5.5 7.5
Treble 6 6
Details 7 6
Soundstage 7.5 7
Imaging 6 7
Dynamics 6.5 6.5
Tonality 6.5 7.3
Technicalities 6.6 6.6

Sennheiser IE900 Aggregated Review Score

Average Reviewer Scores

Crin
Jaytiss Precogvision
Audionotions Head-Fi.org
Super* Review

Average Reviewer Score:

7.8

Strongly Favorable

64 Audio U6T Aggregated Review Score

Average Reviewer Scores

Jaytiss
Precogvision
Audionotions Yifang Head-Fi.org
Super* Review

Average Reviewer Score:

8

Strongly Favorable

Reviews Comparison

Sennheiser IE900 reviewed by Super* Review

Super* Review 9* * score rescaled + normalized
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Super* Review original ranking

Super* Review Youtube Channel

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Price: $1,326

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64 Audio U6T reviewed by Super* Review

Super* Review 9* * score rescaled + normalized
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Super* Review original ranking

Super* Review Youtube Channel

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Price: $1,314

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Sennheiser IE900 reviewed by Audionotions

Audionotions 8.5 Reviewer Score
I usually don't like things that aren't all rounders but this might be the exception. Bass is incredible - best in class - great texture, fantastic physicality. Treble response is great too - pretty resolving. There is a noticeable recession in the upper mids, giving these a fairly U/V shaped sound signature - violins, for example, lack a bit of brightness/bite that I would hope for. But unlike other V-shaped IEMs, the mids aren't offensive. Incredibly fun to listen to. Probably the best single DD available. EQ highly recommended.

Audionotions original ranking

Website (Audionotions)

64 Audio U6T 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.

Audionotions original ranking

Website (Audionotions)

Sennheiser IE900 reviewed by Jaytiss

Jaytiss 7.1 Reviewer Score
B Tuning
C+ Tech
I don't get it, not even a little.

Jaytiss original ranking

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

64 Audio U6T 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-

Sennheiser IE900 reviewed by Precogvision

Precogvision 7 Reviewer Score
A- Tuning
B+ Tech
Excelllent bass - simply excellent. Midrange could use some work, as could the generally average imaging chops.

Precogvision original ranking

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

64 Audio U6T 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-

Sennheiser IE900 reviewed by Head-Fi.org

Head-Fi.org 8.9 * score rescaled + normalized
10 community members have rated the Sennheiser IE900 at an average of 4.7/5 on Head-Fi. Overall sentiment: Exceptional.

URL to full Review

Head-Fi.org original ranking

64 Audio U6T reviewed by Head-Fi.org

Head-Fi.org 8.5 * score rescaled + normalized
2 community members have rated the 64 Audio U6t at an average of 4.5/5 on Head-Fi. Overall sentiment: Outstanding.

URL to full Review

Head-Fi.org original ranking

Sennheiser IE900 (more reviews)

Sennheiser IE900 reviewed by Crin

Crin 6.5 Reviewer Score
B Tuning
A+ Tech
YouTube video thumbnail
Well-resolving DD IEM with excellent treble control, though with somewhat weak mid-high harmonics.
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 original ranking

Crin Youtube Channel

64 Audio U6T (more reviews)

64 Audio U6T reviewed by Yifang

Yifang 8 Reviewer Score
S- Tuning
A+ Tech
check links for more info:

Yifang original ranking

Yifang Youtube Channel

Sennheiser IE900 User Review Score

Average User Scores

Average User Score: n/a

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64 Audio U6T 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

5.5

Gaming Grade

B-

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

5.8

Gaming Grade

B-

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.
Bass S+
Expect a flagship-caliber bass presentation that defines impact, texture, and depth. Power never compromises precision.
Mids B-
Expect a competent midrange that keeps vocals grounded and instruments clear. Tone is acceptable across multiple genres.
Treble B
Highs sound lively and extended while remaining controlled. Detail retrieval keeps shimmer intact.
Dynamics B+
The performance feels robust, with satisfying punch and natural transitions. Nuances are easy to follow.
Soundstage A
The stage stretches in every direction, carving out clear three-dimensional pockets for each player. Placement accuracy impresses from the start.
Details A-
Micro-details glide to the forefront effortlessly while timbre remains natural. Ambient cues are vivid and lifelike.
Imaging B
Good imaging with precise instrument placement and clear front/back localization. Positions snap into place convincingly.
Gaming B-
Moderate spatial presentation conveys general directionality. Suitable for casual play where precision isn't critical. Bad value-to-cost for gaming purpose - not recommended

64 Audio U6T Scorings

Average Technical & Tuning Grades

Average Tunign Grade

A-
  • It balances warmth and clarity well, showing only minor quirks along the way. Timbre feels believable with most instruments.

Average Technical Grade

B+
  • Technical ability is serviceable, keeping basic detail intact across simpler tracks. It keeps up with acoustic tracks without much fuss.
Bass A-
You get robust low-end authority that remains disciplined and textured. Layering stays intact despite the weight.
Mids A
Expect lifelike vocals and instruments with impressive nuance and realism. You can easily follow harmonies and backups.
Treble B
The top end is engaging and airy, yet never overbearing. Brass and strings feel energetic.
Dynamics B+
You get confident dynamics that track both macro swings and rhythmic drive. There's life in every crescendo.
Soundstage A-
The stage stretches in every direction, carving out clear three-dimensional pockets for each player. Placement accuracy impresses from the start.
Details B
Nuance retrieval becomes reliable, highlighting expressive touches in every instrument. It rewards attentive listening.
Imaging A-
Depth mapping feels natural and accurate, supporting convincing immersion. Depth mapping feels precise and natural.
Gaming B-
Moderate spatial presentation conveys general directionality. Suitable for casual play where precision isn't critical. Bad value-to-cost for gaming purpose - not recommended

Sennheiser IE900 User Reviews

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