Mini-drop #1 Friday July 3 @ 8:30am CT

This is the first batch of Caldera Closed Koa LTDs, dropping 1-of-1 style, allowing you to choose the set that speaks to you! There will be a curated variety of configurations available, with specs denoted on each individual photo and listed for preview the day before the drop.  New batches will be released periodically. Subscribe to our email list for release dates!

KOA 

Koa is the stuff of legend. An ancient Hawaiian wood that has held sacred meaning for centuries, this rare and resilient timber arrives with golden-brown warmth and rich grain patterns that seem to capture sunlight itself. Each piece tells a story of Pacific trade winds and volcanic soil. Premium Koa's naturally tight, even grain structure creates an aesthetic of understated elegance: clean lines, warm amber tones, and the kind of visual depth that only comes from slow-grown, precious wood.

The Caldera Closed is ZMF's flagship closed-back planar magnetic headphone, hand-assembled in small batches and finished to highlight the natural character of each piece of Koa. Every set is unique and variations in grain, mineral streaking, and color are not flaws but proof of natural origin. The kind of piece you take with you, wherever the road leads.