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FAT Frequency Grand Maestro Anniversary In-Ear Headphones

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Certified Pre-Owned What’s this?

Original price $5,499.00 (31% Off Est. Retail)
Original price From $3,799.00
Original price $5,499.00 (31% Off Est. Retail)
Current price $3,799.00
From $3,799.00
Current price $3,799.00

+$65.00 Shipping to contiguous US.
Tax collected at checkout.

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Cost to ship this item within the contiguous United States is a flat rate of $65.00 - including packaging and insurance. For all other locations including Hawaii, Puerto Rico and Alaska, please request a quote prior to purchase. Note that all items valued over $750 will require a signature upon delivery. Our Safe Pack and Ship Guarantee means we guarantee its safe arrival. Items are carefully double-boxed or custom foam-molded.

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Product Highlights

The FATfreq Grand Maestro Anniversary (GMA) is a limited-edition tribrid flagship IEM limited to 350 units worldwide. It utilizes Basscannon V2 technology for visceral low-end and a Resoflow Quad EST system for an airy, spacious treble. Advanced configurations include an isobaric dual-dynamic driver setup for precise low-frequency reproduction. The Grade IV titanium shell with diamond-like carbon coating ensures premium ergonomics. For versatility, the GMA includes a physical vocal toggle and interchangeable NOAH modules—Power, Control, SuperStage, and Reference—enabling eight distinct tuning profiles.

Critics from Bloom Audio and Head-Fi rank the GMA as a top-tier performer that rivals the world's most prestigious headphones in layering and detail. Honored with "Best in Show" at NAMM 2026, it is lauded for its thunderous bass and non-fatiguing presentation. This limited release stands as a definitive achievement in high-fidelity audio engineering.
Brand FAT Frequency
Type In-Ear Headphones
MSRP $5,499.00
SKU # 94155
Serial # HF 024/350
Cosmetic Rating

9 - Excellent condition with no notable blemishes.

Functional Notes

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

Age Unknown
Owners Unknown
Service History None

IEM, Braided Headphone Cable, Eight Eartip Size Options, 3.5MM Headphone Jack Adapter, 2.5MM Headphone Jack Adapter, 4.4mm Headphone Jack Adapter, Silver Driver Modules, Blue Driver Modules, Black Driver Modules, Additional Pair of Earbud-to-Cable Connectors, Hard Case, Mesh Case, Factory Packaging

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If we fall short of that promise, every pre-owned item comes with 30-day risk-free returns, 90-day buyers protection warranty, and free lifetime technical support so you have the confidence to explore without hesitation.

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