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64 Audio Duo In-Ear Headphones; Effect Audio Cadmus Cable Upgrade

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Certified Pre-Owned What’s this?

Original price $1,498.00 (53% Off Est. Retail)
Original price From $699.00
Original price $1,498.00 (53% Off Est. Retail)
Current price $699.00
From $699.00
Current price $699.00

+$37.00 Shipping to contiguous US.
Tax collected at checkout.

Earn 699 TMR Rewards points for this purchase.
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Product Highlights

Specs: Frequency Response: 20Hz-20kHz; Sensitivity: 98dB/mW; Impedance: 9Ω; Drivers: 1 Dynamic Low, 1 Tia High. The 64 Audio Duo is a premium universal-fit in-ear monitor featuring a unique open-back architecture. Built with an ergonomic aluminum shell and a perforated stainless steel faceplate grille, it utilizes Apex Core technology to facilitate open airflow, drastically reducing ear pressure and fatigue. Its tubeless Tia System eliminates standard sound tubes to minimize resonance, while Wave Sync technology ensures precise phase coherence. Additionally, Linear Impedance Design guarantees a consistent tonal balance across all audio sources.

Reviewers praise the Duo for delivering an exceptionally wide, holographic soundstage that mimics full-sized open-back headphones. The sound signature is described as a fun, forgiving U-shape, featuring a deep, physical bass punch and smooth, non-fatiguing treble with excellent instrument separation. Users highly commend its superb comfort for all-day listening, though they note that the open design limits passive noise isolation to -12dB, meaning these are ideal for quiet indoor environments rather than loud commutes.

Finding an audio companion that marries the massive, airy stage of high-end home speakers with the lightweight comfort of an in-ear monitor is incredibly rare. The Duo fills this niche beautifully, delivering a highly immersive, fatigue-free musical experience that lets you comfortably lose yourself in the finer details of your favorite tracks for hours on end.
Brand 64 Audio
Type In-Ear Headphones
MSRP $1,498.00
SKU # 95993
Cosmetic Rating

8 - Very good condition with minimal visible cosmetic wear Including some very light wear. Despite this, the monitor function wonderfully.

Functional Notes

Operational condition of this item is excellent, fully tested and no issues found.

Age 2 years
Owners 1
Service History None

Monitors, Aftermarket Earbud Options, Upgraded Effect Audio Cadmus Cable, Factory Packaging

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64 Audio Duo In-Ear Headphones; Effect Audio Cadmus Cable Upgrade
64 Audio Duo In-Ear Headphones; Effect Audio Cadmus Cable Upgrade