Truthear Pure VS Fosi Audio IM4
IEM Comparison: Expert & Community Scores Side-by-Side
Truthear Pure and Fosi Audio IM4 use 1DD+3BA and 1DD (10mm beryllium-coated) driver setups respectively. Truthear Pure costs $90 while Fosi Audio IM4 costs $99. Fosi Audio IM4 is $9 more expensive. Truthear Pure holds a clear 0.6-point edge in reviewer scores (6.9 vs 6.3). Truthear Pure carries a user score of 8.5. Truthear Pure has significantly better treble with a 1-point edge and Truthear Pure has significantly better soundstage with a 1.5-point edge.
Insights
| Metric | Truthear Pure | Fosi Audio IM4 |
|---|---|---|
| Mids | 5 | 5 |
| Treble | 6 | 5 |
| Soundstage | 6.5 | 5 |
| Dynamics | 6 | 6 |
| Tonality | 5.9 | 5.3 |
| Technicalities | 6 | 5 |
Jaytiss Reviews Comparison
Truthear Pure reviewed by
2025-07-16
6.9
Reviewer Score
Youtube Video Summary
The Truthear Pure offers a neutral, JM1-style target tuning aimed at a studio-reference sound, achieving this goal competently for its price point. However, its build quality and accessories feel disappointing and recycled from older models like the Hexa. The shell contouring is rigid and unimpressive, while the tips and case lack innovation. The cable is a slight improvement over the Hexa's – supple but lacking clear right/left indicators – making the overall package just okay, not exciting.
Sonically, the Pure presents a linear bass rise and a generally neutral presentation, differing from the Hexa by offering a bit more warmth but less sparkle and magical mid-range presence. While it fixes the Hexa's "pillowy bass," it doesn't fully surpass it, lacking the Hexa's legendary status. Comparisons reveal it's very similar to the Audio Sense DT200 in tonality, though slightly preferred. It falls short against competitors like the Kiwi Ears Quartet (better bass/mids), Ziigaat Lush (better technicalities), Softears Volume S (more natural curve), or planar options around its price. Crucially, the fit is problematic, often requiring expensive aftermarket tips like the Baroque to work well, which feels impractical for a $90 IEM.
Ultimately, the Pure is a solid but middling release, earning a B rating. It suits those specifically seeking an affordable JM1-style neutral signature or dedicated Truthear fans. For most listeners, however, better alternatives exist: the Hexa remains preferable within Truthear's lineup for its magic, the Nova offers more fun, or competitors like the Aful Explorer (bass-focused), TANGZU Fudu (value planar), or slightly pricier Volume S provide more engaging or technically proficient experiences. It's not a strong general recommendation.
Jaytiss Youtube Channel
Fosi Audio IM4 reviewed by
2025-10-16
6.3
Reviewer Score
Youtube Video Summary
Fosi Audio IM4 brings a beryllium-coated single DD in a compact shell with thoughtful venting that behaves almost open-back for comfort during long sessions. Build is surprisingly premium for ~$100: a small, well-finished nozzle that grips tips, a light but durable cable with color-coded channels and a working chin slider, a tidy case, and tuning nozzles (black/gold) plus multiple tips. It’s the kind of fit and finish usually saved for pricier sets.
Tonally, this is an engaging, warm-rich tuning with elevated sub-bass, good texture, and plenty of detail—not a neutral reference. There’s energy in the 2–4 kHz region and a bit of 5–6 kHz bite that can read as “cat-ear” presence, trading strict smoothness for extra soundstage perception and clarity. Versus the many neutral options at this price, IM4 feels more characterful and fun; think closer to sets that use a staged upper-mid/treble contour than to flat targets. Filters/foams or a touch of EQ can gently tame peaks while keeping the lively character.
On the scoreboard: bass 7/10 (clean shelf and punch), mids a touch recessed versus a neutral target, treble lively with agreeable detail, and stage/detail notably good for the class. Overall, a well-built, fun, and slightly audiophile-tuned single-DD that will appeal to listeners who value texture and excitement over strict neutrality—plus rare build quality and extras at this price make it a solid value.
Jaytiss Youtube Channel
Truthear Pure Details
Driver Configuration: 1DD+3BA
Tuning Type: V-Shaped
Brand: TRUTHEAR Top TRUTHEAR IEMs
Price (Msrp): $89.99
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Fosi Audio IM4 Details
Driver Configuration: 1DD (10mm beryllium-coated)
Tuning Type: Neutral
Price (Msrp): $99
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Truthear Pure 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.
Fosi Audio IM4 Scorings
Average Technical & Tuning Grades
Average Tunign Grade
C+- The tuning leans easygoing, yet occasional unevenness nudges it away from greatness. A bit of EQ polish can smooth things nicely.
Average Technical Grade
C+- Overall technicalities are acceptable, delivering enough clarity for casual sessions. Imaging is serviceable though not immersive.
Truthear Pure User Reviews
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You need to be signed in to write your own reviewNeutral balanced profile.
Pros
No roughness, Natural timbre, Balanced signature, good note density, Very good consistency, comfortable to use, Good cable, Technically good.Cons
Missing brightness, lack of transparency, rare nozzle.Fosi Audio IM4 User Reviews
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Pros
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Cons
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