Wired IEMs
64 Audio Duo
Not yet scored
$1,200
Full review data64 Audio Duo vs Campfire Audio Astrolith - Dual Planar IEM: which should you buy?
Specs, scores and condensed review verdicts for the 64 Audio Duo vs Campfire Audio Astrolith - Dual Planar IEM, side by side. Where a product has no HearWiki score yet, not enough reviews have been aggregated to rate it.
Wired IEMs
Campfire Audio Astrolith - Dual Planar IEM
81Great
$2,200
Full review dataScore breakdown
Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.
Campfire Audio Astrolith - Dual Planar IEM leads on 3 of 4 measures.
- 64 Audio Duo
- Campfire Audio Astrolith - Dual Planar IEM
HearWiki score
-
81
Sound
-
9.0
Value
-
6.5
Price (USD)
$1,200
$2,200
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 Campfire Audio Astrolith - Dual Planar IEM is 3 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 3 years between them, that is a thin return - treat this as a restyle rather than a new platform.
- Duo2021
- Astrolith - Dual Planar IEM20243 yr newer
Specifications
DuoAstrolith - Dual Planar IEM
- Type
- Wired IEMs
- Wired IEMs
- Price (USD)
- $1,200
- $2,200
- HearWiki score
- Not scored
- 81
- Released
- 2021
- 2024
- Availability
- Discontinued
- Discontinued
- Driver
- 1DD + 1 tia hybrid
- 2× 14.2 mm planar magnetic
- Driver type
- hybrid
- planar
- Driver configuration
- 1DD + 1 tia
- -
- Driver size
- 9 mm
- 14.2 mm
- Drivers per side
- 2
- 2
- Frequency response
- -
- 5 Hz - 25 kHz
- Impedance
- 9 Ω
- 8.2 Ω
- Sensitivity
- 98 dB/mW
- 94 dB/mW
- Active noise cancelling
- No
- No
- Voice assistant
- -
- No
- Detachable cable
- -
- Yes
- Connector
- -
- 4.4 mm balanced
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
Campfire Audio Astrolith - Dual Planar IEM
The Campfire Audio Astrolith is a premium dual-planar IEM that delivers a fast, clear, and highly detailed sound with impressive staging and technical precision. Its nearly flat impedance and very low distortion make it a strong performer, though it benefits from quality sources and has a couple of minor ergonomic quirks. Overall, it's a notable step forward in the brand's planar lineup, offering a cohesive and resolving listen for those seeking top-tier wired performance.
- Pro:Exceptional speed and clarity across the frequency range
- Pro:Very low distortion and flat impedance for consistent performance
- Pro:Wide, well-defined soundstage with precise imaging
- Con:Slight mid-bass bloom can color certain tracks
- Con:Stock ear tips are not very good and may need replacement
- Con:Best results require a high-quality source or amplifier
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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