Sony IER Z1R VS FATfreq x Effect Audio: Quantum
IEM Comparison: Expert & Community Scores Side-by-Side
Sony IER Z1R and FATfreq x Effect Audio: Quantum are in-ear monitors. Sony IER Z1R costs $1,700 while FATfreq x Effect Audio: Quantum costs $770. Sony IER Z1R is $930 more expensive. Sony IER Z1R holds a decisive 1.2-point edge in reviewer scores (8.1 vs 7). Sony IER Z1R has significantly better bass with a 2-point edge, Sony IER Z1R has significantly better mids with a 1.8-point edge, Sony IER Z1R has significantly better treble with a 2.8-point edge, FATfreq x Effect Audio: Quantum has significantly better dynamics with a 1.8-point edge, Sony IER Z1R has significantly better soundstage with a 1.5-point edge, Sony IER Z1R has significantly better details with a 1.4-point edge and Sony IER Z1R has significantly better imaging with a 3.1-point edge.
Insights
| Metric | Sony IER Z1R | FATfreq x Effect Audio: Quantum |
|---|---|---|
| Bass | 9.5 | 7.5 |
| Mids | 6.8 | 5 |
| Treble | 7.8 | 5 |
| Details | 7.4 | 6 |
| Soundstage | 8 | 6.5 |
| Imaging | 8.6 | 5.5 |
| Dynamics | 7.3 | 9 |
| Tonality | 8.1 | 7 |
| Technicalities | 8.1 | 7.5 |
Sony IER Z1R Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
8.1Very Positive
FATfreq x Effect Audio: Quantum Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
7Cautiously Favorable
Reviews Comparison
Sony IER Z1R reviewed by Jays Audio
9
Reviewer Score
Jays Audio Youtube Channel
FATfreq x Effect Audio: Quantum reviewed by Jays Audio
7
Reviewer Score
Jays Audio Youtube Channel
Sony IER Z1R reviewed by Shuwa-T
7.9
Reviewer Score
FATfreq x Effect Audio: Quantum reviewed by Shuwa-T
5.7
Reviewer Score
Sony IER Z1R (more reviews)
Sony IER Z1R reviewed by Super* Review
9*
* score rescaled + normalized
Sony IER Z1R reviewed by Yifang
8
Reviewer Score
Sony IER Z1R reviewed by Crin
8
Reviewer Score
Youtube Video Summary
Sony’s IER-Z1R goes full luxury flex: an over-the-top unboxing with nested boxes, a ring-case display, two stock cables (3.5 mm SE and 4.4 mm balanced), and a mountain of tips. The shells are solid metal and surprisingly heavy, feeling like they could survive a drop—or crack a desk. Driver count is “only” three, but the focus is on large dynamic drivers rather than BA stuffing; build and presentation scream premium from the first lift of the lid.
Sonically, the headline is the bass: deep, rumbly, clean, and fast, delivering both sub-bass rumble and well-separated hits—described as the best bass heard from a universal IEM. The midrange has a thicker, weighty character that plays nicer with brighter voices and pop than with male vocals or cello, which can feel a touch heavy. The treble is fit-dependent: a deep seal nets a smooth, extended top end; a shallow fit can tilt peaky and splashy—so ear anatomy and tip choice matter more than usual.
On source pairing, the IER-Z1R scales on a beefy amp but runs just fine off an Apple dongle, undermining fears that it’s a diva. As for value, the verdict is blunt: performance is stellar, but not cost-efficient; similar results can be had for half or even a quarter of the price. This set targets listeners chasing the last 10–20% of performance (or those who simply want the full Sony flagship experience), with the caveat that fit decides whether the treble sings or stings.
Crin Youtube Channel
Sony IER Z1R reviewed by Nymz
8
Reviewer Score
Sony IER Z1R reviewed by Smirk Audio
7.9
Reviewer Score
Sony IER Z1R reviewed by Precogvision
7.9
Reviewer Score
Youtube Video Summary
Sony’s IER-Z1R puts on a proper flagship show from the jump: an exquisite unboxing, hefty zirconium shells, and faceplates with a watch-grade finish that scream luxury. Sonically, the focus is the sub-bass—massive extension, physical rumble, and satisfying decay that together form a true basshead endgame. Compared to the 64 Audio U12t, the Z1R’s low end is clearly superior in slam and texture, while avoiding plasticky BA timbre; resolution is strong overall, even if the U12t keeps a slight edge in microdetail.
The tuning skews moderately V-shaped: male vocals can sound a touch hollow from a dip around the lower mids, whereas female vocals pop with presence and clarity—ideal for J-/K-pop and anime OSTs. Treble carries good extension but emphasizes stick impact that can draw attention over the air up top, a preference call more than a flaw. Staging is notable: among IEMs, the Z1R projects a “speaker-like” scale with one of the widest head-stages heard—still IEM-bound, but grander than most peers, and paired with a warm, engaging timbre.
The catch is fit and ergonomics. The shells are large and unforgiving, and for many ears comfort collapses within minutes; seal is extremely sensitive, with a poor fit turning the treble peaky around ~6 kHz. It’s the single biggest caveat: audition first rather than blind-buying. When the fit cooperates, this is a phenomenal-sounding flagship—arguably preferred over U12t for the right genres—yet its brilliance is undercut by comfort risks that will be a deal-breaker for some.
Precogvision Youtube Channel
Sony IER Z1R reviewed by Tim Tuned
7.5
Reviewer Score
Tim Tuned Youtube Channel
FATfreq x Effect Audio: Quantum (more reviews)
FATfreq x Effect Audio: Quantum reviewed by Kois Archive
7.8
Reviewer Score
Kois Archive Youtube Channel
FATfreq x Effect Audio: Quantum reviewed by Jaytiss
7.8
Reviewer Score
Jaytiss Youtube Channel
FATfreq x Effect Audio: Quantum reviewed by Audio Amigo
6
* score rescaled + normalized
Audio Amigo Youtube Channel
FATfreq x Effect Audio: Quantum reviewed by Head-Fi.org
7.5
* score rescaled + normalized
Sony IER Z1R Details
Driver Configuration: 2DD+1BA
Tuning Type: V-Shaped
Brand: Sony Top Sony IEMs
Price (Msrp): $1,700
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FATfreq x Effect Audio: Quantum Details
Driver Configuration:
Tuning Type: V-Shaped
Price (Msrp): $770
Support our free service! Buying through our affiliate links costs you nothing extra:
Sony IER Z1R User Review Score
Average User Scores
Average User Score: n/a
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FATfreq x Effect Audio: Quantum User Review Score
Average User Scores
Average User Score: n/a
Based on 0 user reviews
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Sony IER Z1R Gaming Score
Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
6.6Gaming Grade
B+FATfreq x Effect Audio: Quantum Gaming Score
Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
6.8Gaming Grade
B+Sony IER Z1R Scorings
Average Technical & Tuning Grades
Average Tunign Grade
A+- Expect a tasteful, well-judged response that feels both musical and true to the source. Great synergy with a wide range of genres.
Average Technical Grade
A+- You get an articulate, polished performance with immersive stage depth and great control. There's a sense of polish across the whole spectrum.
FATfreq x Effect Audio: Quantum Scorings
Average Technical & Tuning Grades
Average Tunign Grade
A-- Tuning lands in a pleasing sweet spot with mostly coherent frequency integration. Tonality stays consistent from track to track.
Average Technical Grade
A- You get a controlled, composed performance, marrying decent clarity with a still-modest sense of space. A safe technical performer for the price bracket.
Sony IER Z1R User Reviews
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