Hidition Viento VS 64 Audio U4S
IEM Comparison: Expert & Community Scores Side-by-Side
Hidition Viento and 64 Audio U4S use 4BA and 1DD+3BA driver setups respectively. Hidition Viento costs $950 while 64 Audio U4S costs $1,100. 64 Audio U4S is $150 more expensive. 64 Audio U4S holds a slight 0.3-point edge in reviewer scores (7.9 vs 8.1). 64 Audio U4S has significantly better bass with a 1.5-point edge, 64 Audio U4S has significantly better mids with a 1.2-point edge, 64 Audio U4S has slightly better treble with a 0.4-point edge, 64 Audio U4S has better dynamics with a 0.5-point edge, Hidition Viento has better soundstage with a 0.6-point edge and 64 Audio U4S has better imaging with a 0.9-point edge.
Insights
| Metric | Hidition Viento | 64 Audio U4S |
|---|---|---|
| Bass | 6.5 | 8 |
| Mids | 6.6 | 7.8 |
| Treble | 6.4 | 6.8 |
| Details | 7.1 | 7.3 |
| Soundstage | 6.6 | 6 |
| Imaging | 6.6 | 7.5 |
| Dynamics | 7.2 | 7.7 |
| Tonality | 8.5 | 7.4 |
| Technicalities | 7.6 | 7 |
Hidition Viento Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
7.9Strongly Favorable
64 Audio U4S Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
8.1Very Positive
Reviews Comparison
Hidition Viento reviewed by Precogvision
6.6
Reviewer Score
Youtube Video Summary
Hidition Viento B aims for a reference-lean balance: a leveled sub-bass shelf to around 200 Hz, a lean lower midrange, and very emphasized upper-mids with a notable mid-treble lift. On paper it graphs cleanly, but in practice the contrast thins out note weight and exposes a ringy decay on upper harmonics, pushing cymbals and sibilants forward more than natural.
Technicalities are mixed. Microdynamic contrast is the standout, with low-level inflections popping more readily than peers, yet imaging and stage size hover around average for the price. BA timbre remains audible, and the elongated nozzle that mimics a CIEM fit can be uncomfortable unless a deep insertion is possible; the CIEM version is said to mitigate several of these concerns.
Precogvision Youtube Channel
64 Audio U4S reviewed by Precogvision
7.7
Reviewer Score
Youtube Video Summary
The 64 Audio U4s hits a compelling sweet spot: a 1DD+3BA hybrid around $1,100 that echoes the lush, bass-tilted character of the Nio while fixing key drawbacks. Packaging and accessories feel improved, with multiple tip options and the included M12 APEX module; APEX not only tailors bass but also relieves pressure for long sessions. Fit follows 64 Audio’s comfortable triangular shell; the vented DD asks for a slightly shallower insert than the all-BA models. Sonically, expect a sub-bass-oriented shelf and a treble profile that’s more lively and “zingy” than the Nio, with extra energy around the upper treble. The big caveat is 64 Audio’s muted 2–4 kHz region, which can set soprano vocals a step back on the stage.
Against the brand’s full-BA staples (think U12t/U6t), the U4s trades some pinpoint imaging and coherency for unmistakable DD slam and tactile “air pushing.” Extension at both ends is excellent, with upper-treble energy that makes micro-detail and reverb trails pop. It’s not the clean, conventional neutrality of something like a Monarch-style tuning; rather, it’s a deliberate, colored signature that delivers fun plus technical chops. Crucially, it fills a missing niche at its price and, in many respects, outperforms the pricier Nio, making the U4s a standout recommendation for listeners who want bass authority, sparkle, and engaging dynamics without going all-in on the flagship tier.
Precogvision Youtube Channel
Buy 64 Audio U4S on audio46
Ad
Price: $1,122
Buy 64 Audio U4S on audio46
Hidition Viento (more reviews)
Hidition Viento reviewed by Yifang
8.5
Reviewer Score
Hidition Viento reviewed by Crin
8.5
Reviewer Score
Youtube Video Summary
Hidition is framed as an OG IEM house (founded 2003), and the Viento is praised as the rare decade-old set that still sits in the top tier. Released in the height of the driver wars, it rejected driver-count inflation for a 4-driver, 4-way crossover architecture—each BA handling its own band: sub-bass, lower mids, upper mids, treble. The result is “efficiency” engineering that prioritizes clean division of labor over headcount, following the neutral lineage of the NT6 while modernizing with a subtle sub-bass lift.
The Viento’s two-switch system is highlighted as unusually precise: one switch for sub-bass, one for lower mids, yielding four distinct tunings—A (neutral), B (sub-bass boost), C (lower-mid warmth), and D (both). It’s noted that the custom shell outperforms the universal demo (which can sound a bit bright/shouty due to fit depth), making this one of the few customs actively recommended. In 2023 it sits at S- on the ranking list: versatile across configs, close to an IEF-neutral target, and—relative to today’s market—“cheap” at about $1,000 from Zeppelin & Co. Overall, the Viento is portrayed as lightning in a bottle: enduring tuning, elegant engineering, and real-world usability that keeps it in regular rotation years after release.
Crin Youtube Channel
64 Audio U4S (more reviews)
64 Audio U4S reviewed by Super* Review
9*
* score rescaled + normalized
Youtube Video Summary
The 64 Audio U4s hits a compelling sweet spot: a 1DD+3BA hybrid around $1,100 that echoes the lush, bass-tilted character of the Nio while fixing key drawbacks. Packaging and accessories feel improved, with multiple tip options and the included M12 APEX module; APEX not only tailors bass but also relieves pressure for long sessions. Fit follows 64 Audio’s comfortable triangular shell; the vented DD asks for a slightly shallower insert than the all-BA models. Sonically, expect a sub-bass-oriented shelf and a treble profile that’s more lively and “zingy” than the Nio, with extra energy around the upper treble. The big caveat is 64 Audio’s muted 2–4 kHz region, which can set soprano vocals a step back on the stage.
Against the brand’s full-BA staples (think U12t/U6t), the U4s trades some pinpoint imaging and coherency for unmistakable DD slam and tactile “air pushing.” Extension at both ends is excellent, with upper-treble energy that makes micro-detail and reverb trails pop. It’s not the clean, conventional neutrality of something like a Monarch-style tuning; rather, it’s a deliberate, colored signature that delivers fun plus technical chops. Crucially, it fills a missing niche at its price and, in many respects, outperforms the pricier Nio, making the U4s a standout recommendation for listeners who want bass authority, sparkle, and engaging dynamics without going all-in on the flagship tier.
Super* Review original ranking
Super* Review Youtube Channel64 Audio U4S reviewed by Audionotions
8.5
Reviewer Score
64 Audio U4S reviewed by Smirk Audio
7.8
Reviewer Score
64 Audio U4S reviewed by Jaytiss
7.8
Reviewer Score
Jaytiss Youtube Channel
64 Audio U4S reviewed by Head-Fi.org
8
* score rescaled + normalized
Hidition Viento Details
Driver Configuration: 4BA
Tuning Type: Neutral
Brand: Hidition Top Hidition IEMs
Price (Msrp): $950
Support our free service! Buying through our affiliate links costs you nothing extra:
64 Audio U4S Details
Driver Configuration: 1DD+3BA
Tuning Type: Neutral, Neutral with Bass Boost
Brand: 64 Audio Top 64 Audio IEMs
Price (Msrp): $1,100
Support our free service! Buying through our affiliate links costs you nothing extra:
Hidition Viento 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!
64 Audio U4S 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!
Hidition Viento Gaming Score
Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
6.9Gaming Grade
B+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
BHidition Viento Scorings
Average Technical & Tuning Grades
Average Tunign Grade
S-- Tonal balance reaches a highly refined state, sounding seamless from lows to highs. Everything locks together with satisfying coherence.
Average Technical Grade
A- The balance of resolution and space feels assured, keeping complex passages coherent. Layering is convincing on most studio mixes.
64 Audio U4S Scorings
Average Technical & Tuning Grades
Average Tunign Grade
A-- A smooth, agreeable balance keeps the presentation engaging without obvious flaws. Only sensitive ears will nitpick the bumps.
Average Technical Grade
A-- Technical chops are reliable, pairing tidy separation with a soundstage that stays conservative. Micro-detail is decent, though never spotlighted.
Hidition Viento User Reviews
"This is an example review"
Pros
- Example pro 1
- Example pro 2
Cons
- Example con 1
- Example con 2
Share your experience and build your personal ranking list.
You need to be signed in to write your own review64 Audio U4S User Reviews
"This is an example review"
Pros
- Example pro 1
- Example pro 2
Cons
- Example con 1
- Example con 2
Share your experience and build your personal ranking list.
You need to be signed in to write your own reviewFind your next IEM:
IEM Finder Quiz
newIEM Comparison Tool
newVS