ZMF Caldera Closed — Shou Sugi Ban Ash

Pure isolation. Explosive planar power.

The Caldera Closed is ZMF’s first closed-back planar magnetic headphone designed from the ground up – a natural evolution of the award-winning Caldera Open (Headfonics Best Ortho 2023). It features the patented Atrium Damping System, patented Caldera Pads, and the CAMS magnet structure.

Many planar fans love the technical strengths, yet miss natural tone and physical presence. After years of research, ZMF developed technologies such as CAMS (Caldera Asymmetrical Magnet Structure) and ADS (Atrium Damping System) to combine the best of planar speed with the musicality of great dynamic designs.

Caldera Closed delivers a natural, believable sound with outstanding detail retrieval and spaciousness – complemented by powerful sub-bass, improved isolation, and a tuning closer to the Harman target. Speed, dynamics, and ZMF’s signature musicality remain fully intact.

Visually, Caldera Closed features a cup shape inspired by volcanic structures. Asymmetrical contours optimize airflow and acoustics, while the ergonomic form makes the headphone feel surprisingly light on the head.

The standard edition comes in Shou Sugi Ban Ash – European ash refined using a traditional Japanese technique of controlled charring. It highlights the grain and ensures a unique look for every pair.

With an 80 mm planar driver, 60-ohm impedance, and ~95 dB/mW sensitivity, Caldera Closed performs beautifully across many setups, yet scales especially well with powerful, high-resolution amplifiers.

The Caldera Closed is the pinnacle of closed-back planar engineering: powerful, musical, and precise – a true endgame headphone for anyone who wants isolation and audiophile perfection.

Standard wood: Shou Sugi Ban Ash

Technical Specifications

Includes

• Ash Wood Caldera Closed
• ZMF Stock Braided Cable and OFC Cable
• ZMF Caldera Closed Hybrid Pads and 1 set of your choice
• ZMF Owner's Card
• Lifetime Driver Warranty