Wired IEMs
64 Audio Duo
Not yet scored
$1,200
Full review data64 Audio Duo vs Thieaudio Valhalla: which should you buy?
Specs, scores and condensed review verdicts for the 64 Audio Duo vs Thieaudio Valhalla, side by side. Where a product has no HearWiki score yet, not enough reviews have been aggregated to rate it.
Wired IEMs
Thieaudio Valhalla
81Great
$2,000
Full review dataScore breakdown
Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.
Thieaudio Valhalla leads on 3 of 4 measures.
- 64 Audio Duo
- Thieaudio Valhalla
HearWiki score
-
81
Sound
-
9.0
Value
-
6.0
Price (USD)
$1,200
$2,000
Generation & platform
The scores rank quality. This is the other question: is the newer one actually newer technology, or the same platform in a new shell?
Same generation
The Thieaudio Valhalla is 4 years newer, but it is the same generation of hardware: nothing in the radio, the codecs or the noise cancelling separates them. Nothing separates them on convenience features either, so the choice comes down to tuning and price. For 4 years between them, that is a thin return - treat this as a restyle rather than a new platform.
- Duo2021
- Valhalla20254 yr newer
Specifications
DuoValhalla
- Type
- Wired IEMs
- Wired IEMs
- Price (USD)
- $1,200
- $2,000
- HearWiki score
- Not scored
- 81
- Released
- 2021
- 2025
- Availability
- Discontinued
- Sold new
- Driver
- 1DD + 1 tia hybrid
- 19× balanced armature
- Driver type
- hybrid
- balanced-armature
- Driver configuration
- 1DD + 1 tia
- -
- Driver size
- 9 mm
- -
- Drivers per side
- 2
- 19
- Impedance
- 9 Ω
- 9 Ω
- Sensitivity
- 98 dB/mW
- -
- Active noise cancelling
- No
- No
What reviewers said
64 Audio Duo
This universal-fit hybrid earphone pairs a single dynamic driver for lows with a tia driver for highs, aiming to deliver an airy, open-sounding stage in a compact in-ear design. Its semi-open architecture suits those who crave a spacious, speaker-like feel while staying portable. With a low 9-ohm impedance and 98 dB sensitivity, it pairs easily with most sources.
- Pro:Open, airy soundstage reminiscent of over-ear headphones
- Pro:Hybrid driver setup offers clear separation between bass and treble
- Pro:Lightweight and comfortable for extended listening
- Con:Semi-open design may leak sound in quiet environments
- Con:Lacks noise isolation for noisy commutes
- Con:High price point for a two-driver configuration
Thieaudio Valhalla
The Thieaudio Valhalla is a premium all-balanced-armature in-ear monitor that prioritizes technical clarity and precise sound staging. Its design focuses on delivering crisp, well-defined bass, transparent mids, and extended treble without harshness, making it a strong choice for analytical listening rather than a relaxed, warm signature. The build quality and fit are top-tier, reflecting its flagship status.
- Pro:Exceptional detail retrieval and instrument separation
- Pro:Clean, well-controlled bass with solid punch
- Pro:Neutral yet engaging tuning across the frequency range
- Con:Very high price point limits accessibility
- Con:Low impedance may require a quality source to avoid hiss
- Con:Not suited for listeners seeking a warm or laid-back sound
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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