What is the best grind for Kalita Wave?

The Kalita Wave’s reputation for consistency stems from its geometry. Unlike the Hario V60, which relies heavily on the brewer’s pouring technique to manage flow, the Kalita’s flat-bottomed bed and three-hole exit restrict water movement, creating a more uniform extraction. This design effectively mitigates the 'channeling' common in conical brewers, where water bypasses the coffee bed. For the producer, this means the brewer is less likely to mask the delicate terroir of a high-altitude microlot with uneven extraction. A common misconception is that the Kalita requires a coarse grind; while some recipes suggest medium-coarse, a medium-fine setting often yields better clarity and sweetness by increasing the surface area for extraction within the shorter contact time typical of this method. When dialing in, focus on the 'flat bed'—if your grounds are not level after the final pour, it often indicates an uneven pour or an inconsistent grind size, which leads to 'boulders' and 'fines' extracting at different rates. By prioritizing a consistent medium-fine grind, you allow the brewer to do the heavy lifting, ensuring the cup reflects the work of the farmer rather than the errors of the technique.