Sennheiser IE900 VS 64 Audio U4s

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Sennheiser IE900 and 64 Audio U4s use 1DD and 1DD+3BA driver setups respectively. Sennheiser IE900 costs $1,500 while 64 Audio U4s costs $1,100. Sennheiser IE900 is $400 more expensive. 64 Audio U4s holds a clear 0.5-point edge in reviewer scores (7.6 vs 8.2). Sennheiser IE900 has significantly better bass with a 2-point edge, 64 Audio U4s has significantly better mids with a 2.3-point edge, 64 Audio U4s has better treble with a 0.8-point edge, 64 Audio U4s has significantly better dynamics with a 1.2-point edge, Sennheiser IE900 has significantly better soundstage with a 1.5-point edge, 64 Audio U4s has slightly better details with a 0.3-point edge and 64 Audio U4s has significantly better imaging with a 1.5-point edge.

Metric	Sennheiser IE900	64 Audio U4s
Bass	10	8
Mids	5.5	7.8
Treble	6	6.8
Details	7	7.3
Soundstage	7.5	6
Imaging	6	7.5
Dynamics	6.5	7.7
Tonality	6.5	7.4
Technicalities	6.6	7

Sennheiser IE900 Aggregated Review Score

Average Reviewer Score:

7.6

Strongly Favorable

Show all Sennheiser IE900 reviews

64 Audio U4s Aggregated Review Score

Average Reviewer Score:

8.2

Very Positive

Show all 64 Audio U4s reviews

Driver Configuration: 1DD

Tuning Type: Warm V

Brand: Sennheiser Top Sennheiser IEMs

Price (Msrp): $1,500

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$1,326

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Driver Configuration: 1DD+3BA

Tuning Type: neutral, bass-boosted neutral

Brand: 64 Audio Top 64 Audio IEMs

Price (Msrp): $1,100

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$1,122

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Sennheiser IE900 User Review Score

Average User Score: n/a

Based on 0 user reviews

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64 Audio U4s User Review Score

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Sennheiser IE900 Gaming Score

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 U4s Gaming Score

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

Gaming Score

6.1

Gaming Grade

Sennheiser IE900 Scorings

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 S+

World-class bass performance. Perfectly balanced between visceral impact, texture, and depth with zero bleed into mids.

Mids B-

Decent midrange performance - balanced but unremarkable. Adequate clarity for most genres without notable flaws.

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 A-

Excellent detail retrieval: highly resolving without being clinical. Effortlessly reveals micro-details and textural subtleties.

Imaging B

Good imaging with precise instrument placement. Clear localization within the soundstage including front/back positioning.

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 U4s Scorings

Average Tunign Grade

A-

Pleasing tonal balance with good technical control. Minor quirks present but not distracting. Demonstrates decent genre versatility.

Average Technical Grade

A-

Competent technical presentation. Handles separation and detail well in most tracks, with modest soundstage and acceptable imaging capabilities.

Bass A+

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 B+

Good treble response - clear and detailed without fatigue. Well-extended with proper air and sparkle.

Dynamics A

Excellent dynamics with great contrast and speed. Transients are crisp and micro-details are clearly articulated.

Soundstage B

Good soundstage with proper width and depth. Instruments have clear positioning with reasonable front/back placement.

Details A-

Excellent detail retrieval: highly resolving without being clinical. Effortlessly reveals micro-details and textural subtleties.

Imaging A

Excellent imaging: precise and stable placement. Instruments occupy specific points in space with tangible positions.

Gaming B

Decent spatial awareness for fundamental positioning. Creates satisfying atmosphere in story-driven games while handling basic directional cues. Bad value-to-cost for gaming purpose - not recommended

Sennheiser IE900 Reviews

Reviewed by: Super* Review

9* * score normalized

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Super* Review original ranking

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Price: $1,326

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Reviewed by: 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. Previously Owned

Audionotions original ranking

Website (Audionotions)

Reviewed by: 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

Reviewed by: 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

Reviewed by: Crin

6.5 Reviewer Score

B Tuning

A+ Tech

Well-resolving DD IEM with excellent treble control, though with somewhat weak mid-high harmonics.

Crin original ranking

Crin Youtube Channel