Truthear Hexa Review: Why This $80 Hybrid IEM Became the Sub-$100 Benchmark
Last updated: September 2026 · Reading time: 14 minutes · By: XCHIFI Engineering
The Truthear Hexa, released in late 2019, became the de-facto benchmark for audiophile IEMs under $100. Using a single 10mm dynamic driver plus three Knowles balanced armatures in a hybrid topology, the Hexa delivered reference-class tuning at an unprecedented price point. This article breaks down what makes it special, where it falls short, and how it compares to modern alternatives.
1. Truthear: The Brand Behind the Hexa
Truthear is a Chinese IEM brand that emerged in 2019 as part of the wave of new ChiFi companies focused on delivering measurement-driven tuning at aggressive price points. The Hexa was their breakout product, designed in collaboration with the audiophile community to achieve what was previously thought impossible: a Harman 2019-compliant sound at under $100.
The brand’s design philosophy centers on measurement accuracy first, subjective refinement second. The Hexa measured within ±2dB of the Harman 2019 target across the entire audible range — a level of precision that previous sub-$100 IEMs could only approximate.
2. Hardware: Hybrid DD + 3BA Topology
The Truthear Hexa uses a hybrid driver configuration combining two different driver technologies:
- 10mm dynamic driver (DD): handles bass and lower midrange (20-300Hz)
- BA1 + BA2 (Knowles): handle midrange (300Hz-5kHz)
- BA3 (Knowles tweeter): handles treble (5kHz-20kHz)
This split exploits the strengths of each driver type: dynamic drivers for natural, full bass; balanced armatures for precise, fast midrange and treble.
3. Harman 2019 Compliance: The Tuning Achievement
The Hexa’s signature achievement is its near-perfect Harman 2019 compliance. Independent measurements show:
- Bass (20-200Hz): +3 to +4 dB shelf, matching Harman target
- Midrange (200Hz-2kHz): +2 to +3 dB plateau, matching target
- Upper midrange (2-5kHz): Slight dip to avoid shoutiness
- Treble (5kHz-20kHz): -6 to -8 dB roll-off, matching target
Total deviation from the Harman 2019 target across the audible range: typically within ±2dB. For reference, many sub-$100 IEMs deviate by ±5-10dB from their stated target curves.
This level of accuracy matters because the Harman target was developed from blind listening tests with hundreds of trained and untrained listeners. Matching it means delivering what most listeners actually prefer, not a marketing-tuned signature.
4. Reviewer Reception: Why Critics Loved It
Professional reviewers broadly praised the Hexa on three points:
4.1 Bass Quality
The 10mm dynamic driver delivers bass that reviewers consistently described as “textured,” “controlled,” and “natural.” Unlike many sub-$100 IEMs that either lack bass or have bloated, boomy bass, the Hexa’s DD handles low frequencies with control and detail. Sub-bass extension reaches ~20Hz at audible levels.
4.2 Midrange Clarity
The dual-BA midrange setup delivers vocals and instruments with precision. Reviews noted that vocals sound “present but not forward,” “natural in timbre,” and “free of the BA artificiality” common in cheaper BA implementations.
4.3 Treble Smoothness
The single treble BA provides detail without harshness. The treble extension reaches 16kHz+ audibly, with the gentle roll-off above 8kHz avoiding the “piercing” or “fatiguing” quality of poorly-tuned BA tweeters.
5. Where the Hexa Falls Short
Despite its strengths, the Hexa has documented limitations:
5.1 Coherence Issues
The four-driver hybrid topology introduces phase coherence challenges. Sound from the 10mm DD arrives at slightly different times than sound from the three BAs, creating subtle “veil” or “blur” in transients. This is less severe than the side-by-side DD issue in budget designs, but more pronounced than coaxial or single-driver designs.
5.2 Build Quality
The Hexa uses a resin shell with a metal faceplate. Build quality is good for the price but not exceptional. The included cable is functional but not premium.
5.3 Limited Tuning Variation
Unlike some brands that offer multiple tuning filters or switches, the Hexa has a fixed Harman 2019 tuning. Users wanting bass-boosted or vocal-forward signatures need to look elsewhere or modify via EQ.
6. Comparison with Modern Alternatives
Seven years after launch, the Hexa still holds up well, but newer competitors offer different strengths:
| IEM | Price | Configuration | Strength vs Hexa |
|---|---|---|---|
| Truthear Hexa | $80 | 10mm DD + 3 BA | Benchmark (reference) |
| Moondrop Chu II | $30 | Single DD | Lower price, similar Harman target |
| TINHIFI T2 | $50 | Coaxial 6mm+10mm DD | Better phase coherence (coaxial) |
| CrinEar Nightfall | $80-150 | 10mm + 8mm side-by-side DD | CNC aluminum shell, more bass |
| Moondrop Variations | $300 | Tribrid (DD + 4BA + 2EST) | More detail, wider soundstage |
For sub-$100 in 2026, the Hexa is still competitive, but the Moondrop Chu II offers similar Harman compliance at $30, and the TINHIFI T2 offers better phase coherence at $50. The Hexa’s value comes from the combination of DD + BA topology and Harman compliance at $80.
7. Who Should Buy the Truthear Hexa?
The Hexa is the right choice if you want:
- Reference tuning without paying $200+ for it
- Detailed, controlled bass from a dynamic driver
- Clear vocals and instruments from balanced armatures
- Smooth treble without harshness or sibilance
The Hexa is not the right choice if you want:
- Bass-heavy sound (consider CrinEar Nightfall or bass-boosted IEMs)
- Maximum phase coherence (consider TINHIFI T2 coaxial)
- Premium build at any price (consider $200+ IEMs with metal shells)
8. Cost Breakdown (Industry Estimates)
For a retail price of US$80, the following legacy cost estimates are unverified, not manufacturer quotations. Dollar values are rounded at the 18 September 2026 exchange-rate reference:
- 10mm dynamic driver: ~US$3.73
- 3 Knowles balanced armatures: ~US$6.72
- Resin shell (3D printed): ~US$1.19
- Cable, tips, packaging: ~US$4.48
- Assembly + QC: ~US$3.73
- Total BOM (per pair): ~US$19.85
In this unverified cost illustration, US$19.85 is about 25% of a US$80 retail price. The remaining amount is not a measured profit margin; development, logistics, taxes, service and channel costs are not established here. These numbers should not be treated as the actual Hexa bill of materials.
9. Conclusion: A Benchmark That Aged Well
The Truthear Hexa set a new standard when released in 2019. Seven years later, it remains a valid sub-$100 benchmark because the fundamentals haven’t changed: a single dynamic driver for bass, multiple balanced armatures for detail, and Harman 2019-compliant tuning.
The Hexa’s main competition now is from within its own price tier — newer IEMs with similar tuning at lower prices (Chu II) or different driver topologies (T2 coaxial). But the Hexa’s combination of DD + BA + Harman compliance at $80 is still hard to beat.
For audiophiles seeking reference-class sound without spending $300+, the Hexa remains a benchmark worth owning.
Frequently Asked Questions
Is the Truthear Hexa still worth buying in 2026?
Yes, if you want reference-class Harman 2019 compliance under $100 with DD+BA topology. The Hexa remains a benchmark, though newer sub-$100 alternatives exist at lower prices (Moondrop Chu II at $30 with similar tuning).
What drivers does the Truthear Hexa use?
A single 10mm dynamic driver for bass plus three Knowles balanced armatures for midrange and treble (typically two BAs for midrange, one BA for treble).
Why is the Hexa considered a Harman 2019 benchmark?
Independent measurements show the Hexa within ±2dB of the Harman 2019 target across the entire audible range. The Harman target was derived from blind listening tests as a “preferred sound” by hundreds of listeners, so matching it means delivering what most people actually like.
What’s the difference between Hexa and TINHIFI T2?
The Hexa uses a hybrid DD+BA topology (multiple driver types), while the T2 uses a coaxial dual-DD design (two dynamic drivers on the same axis). The T2 has better phase coherence; the Hexa has more detail from its BA drivers. Both achieve excellent Harman compliance at low prices.
Is the Truthear Hexa good for music production?
The Hexa’s Harman 2019 compliance and detailed midrange make it a capable budget monitoring IEM. However, the 4-driver hybrid coherence issues mean it’s less accurate than coaxial or single-driver designs for critical mixing tasks.
Driver configuration and tuning claims based on public technical documentation and reviewer measurements as of 2026. Cost estimates reflect industry-standard BOM ranges for hybrid IEMs.