HUM Reference and 64 Audio U4s are in-ear monitors. HUM Reference costs $1,300 while 64 Audio U4s costs $1,100. HUM Reference is $200 more expensive. 64 Audio U4s holds a decisive 2.2-point edge in reviewer scores (6 vs 8.2). 64 Audio U4s has significantly better bass with a 2.5-point edge, 64 Audio U4s has significantly better mids with a 1.2-point edge, 64 Audio U4s has better treble with a 0.8-point edge, HUM Reference has better soundstage with a 0.5-point edge, HUM Reference has slightly better details with a 0.3-point edge and 64 Audio U4s has significantly better imaging with a 1.5-point edge.
Insights
Metric | HUM Reference | 64 Audio U4s |
---|---|---|
Bass | 5.5 | 8 |
Mids | 6.6 | 7.8 |
Treble | 6 | 6.8 |
Details | 7.5 | 7.3 |
Soundstage | 6.5 | 6 |
Imaging | 6 | 7.5 |
Dynamics | 6 | 7.7 |
Tonality | 6 | 7.4 |
Technicalities | 6.1 | 7 |
HUM Reference Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
6Mixed
64 Audio U4s Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
8.2Very Positive
Reviews Comparison
HUM Reference (more reviews)
HUM Reference reviewed by Shuwa-T
HUM Reference reviewed by Crin
64 Audio U4s (more reviews)
64 Audio U4s reviewed by Super* Review
64 Audio U4s reviewed by Audionotions
64 Audio U4s reviewed by Smirk Audio
64 Audio U4s reviewed by Jaytiss
Jaytiss Youtube Channel
64 Audio U4s reviewed by Precogvision
Precogvision Youtube Channel
HUM Reference Details
Driver Configuration:
Tuning Type: Neutral
Price (Msrp): $1,300
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64 Audio U4s Details
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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HUM Reference User Review Score
Average User Scores
Average User Score: n/a
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64 Audio U4s User Review Score
Average User Scores
Average User Score: n/a
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HUM Reference Gaming Score

Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
5.1Gaming Grade
C+64 Audio U4s Gaming Score

Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
6.1Gaming Grade
BHUM Reference 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.
64 Audio U4s Scorings
Average Technical & Tuning Grades
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.
HUM Reference User Reviews
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