Coffee is more than a morning habit—it’s a core productivity tool for many, and increasingly, a craft. As people adapt to disrupted sleep schedules, finding the right brewing method matters. For serious coffee drinkers, the Ratio Four Series Two drip coffee maker stands out as an essential tool for evaluating new beans and enjoying consistently high-quality results.
The Evolution of Drip Coffee
For years, drip coffee was seen as a utilitarian necessity rather than a refined experience. The author, WIRED’s lead coffee writer, recalls a past of weak, bitter diner coffee as a young traveler in India. He preferred strong, unfiltered brews and carried that preference to the US, where black coffee became a personal standard. But the modern drip coffee landscape has changed: recent technological advances have elevated the experience, making it a viable rival to espresso and pour-over methods.
The key shift came with cafes like Stumptown and Heart Coffee Roasters in Portland pushing light-roast, immersion-style coffee. This approach, championed by Scandinavian roasters, focused on aromatic purity and extracting complex flavors. The author realized that home brewing hadn’t caught up until a new generation of machines emerged, offering tight temperature control, bloom cycles, and showerhead technology.
Why the Ratio Four Stands Out
Among the high-end drip coffee makers on the market, the Ratio Four remains the author’s go-to for testing new beans. While machines like the Fellow Aiden and xBloom Studio offer more versatility, the Four excels at consistency and ease of use. It’s designed for small batches (8–16 ounces), brewing a full 20-ounce batch in just over five minutes.
The Four’s extraction is gentle but thorough, revealing flavors that other brewers might miss. It consistently produces full-bodied coffee, even rivaling the precision of a Technivorm Moccamaster. The author notes that the Four’s ability to reliably reproduce the same character between batches is a major advantage for serious testing.
Trade-offs and Maintenance
The Ratio Four isn’t perfect. Its ribbed brew chamber tends to accumulate coffee oils, requiring monthly cleaning with Urnex Cafiza powder. The lack of a drip stop means wiping up spills is necessary, and it doesn’t feature a thermal carafe—the coffee cools relatively quickly.
However, the author prefers this serving temperature (around 150°F), which aligns with the ideal balance of aromatics and perceived sweetness. The Four prioritizes immediate enjoyment over prolonged heat retention, making it ideal for those who drink coffee as soon as it’s brewed.
The Ratio Four isn’t just a coffee maker; it’s a tool for deep engagement with the nuances of each bean. It allows for repeatable, reliable results that reveal hidden flavors, making it an essential part of any serious coffee drinker’s routine.
