The Ratio Four Series Two produces drip coffee close enough to a professional pour-over that one of WIRED‘s lead coffee reviewers keeps it permanently on his counter — and uses it as his baseline when testing new beans.
According to the piece, the $279 small-batch brewer from Portland-based Ratio represents the current ceiling of home drip technology: a showerhead that agitates grounds, tight temperature control, and a bloom phase that lets carbon dioxide escape before full extraction begins. The result, the reviewer argues, captures the aromatic character of freshly ground beans more faithfully than most home machines on the market.
How Drip Coffee Got Here
The machine’s appeal sits inside a longer story. For most of the past two decades, home drip brewers were largely incapable of producing a genuinely high-quality cup. The exception was the classic Moccamaster. Everything else fell short of what a skilled barista could extract with a kettle and a conical filter.
That changed when a wave of specialty cafes began treating drip coffee with the same precision applied to espresso. In Portland, roasters including Stumptown Coffee and Heart Coffee Roasters pushed light-roast filter coffee toward something closer to a sensory experience — fruity, aromatic, specific. Heart‘s Norwegian owner-roaster Wille Yli-Luoma argued that Scandinavian coffee culture had long understood this, developing light-roast immersion brews that could register notes of peach, nectarine, or blueberry from Ethiopian beans.
The reviewer says that clarity of flavor was simply not replicable at home until manufacturers began engineering machines to mirror cafe pour-over technique. Brands including Bonavita and OXO helped move the category forward. The Ratio Four, now quietly into its second generation, is where that progression currently lands.
Why It Stays on the Counter
The reviewer’s attachment to drip coffee runs deeper than convenience. It traces back to a teenage trip to India, where a cup of intensely strong filter coffee in Jaipur — drunk black, against the advice of a local friend — locked in a preference that lasted through years of bad office breakroom coffee in Oregon.
That preference eventually found worthy hardware. The Ratio Four is described as the machine the reviewer reaches for first each morning, before pulling espresso, before testing anything else. It serves as a reference point: if a bag of beans tastes good here, brewed simply, the beans are good.
At $279, the brewer sits at the premium end of home drip. The announcement does not claim it replaces a trained barista or a dedicated pour-over setup. What it offers, the reviewer says, is a repeatable, hands-off process that delivers cafe-quality extraction without requiring someone to stand over a kettle while half-asleep.
The broader category — high-precision home drip — has moved fast. The Ratio Four Series Two is, by this account, currently its most useful representative.
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