Ratio Six Series 2 Coffee Machine - Automatic Drip Coffee Maker - 1.25L/40oz Carafe - Brews 2-8 Cups - Matte Black - Programmable Timer

Product Overview

The Ratio Six Series 2 bridges the gap between manual pour-over and automated drip brewing. It uses a precision-engineered shower head with strategically placed holes to saturate coffee grounds evenly, ensuring optimal extraction. The brewing process mimics a pour-over: hot water flows through grounds into a laboratory-grade borosilicate glass carafe with a thermal double-wall design that keeps coffee hot for extended periods. The machine brews 2 to 8 cups (40 oz / 1.25 L total capacity), making it suitable for both solo drinkers and small groups. The construction combines a matte black stainless steel body with BPA-free Tritan plastic components, offering a modern, sturdy appearance. The carafe features a redesigned spout for cleaner pouring and a wide opening for easy hand cleaning, but some reviewers note the lid can cause splashing when pouring the last half of coffee. The brew basket and heat shield require manual placement each cycle, and the machine lacks a hot plate to keep coffee warm after brewing. Hand washing is recommended to maintain the finish. The Ratio Six is not smart-home compatible and operates with a single button—press to brew, and the machine handles the rest. It uses a reusable filter basket, compatible with BUNN 8-12 cup paper filters or Ratio's own filters.

Build & Materials

The Ratio Six Series 2 is built with a matte black stainless steel exterior that gives it a sleek, professional look. The brew basket, heat shield, and water reservoir are made from BPA-free Tritan plastic, while the carafe is borosilicate glass with a thermal double wall. The carafe redesign includes a fixed lid (no moving parts) and a wider mouth for easier cleaning. The heat shield has been raised slightly compared to earlier models to reduce splashing when removing the carafe mid-brew. The overall construction feels solid and heavy, though some reviewers note that water can get trapped between layers of plastic in the lid and basket, requiring extra shaking after washing. The machine is tall—over a foot high—which may be a consideration for low-cabinet kitchens. All parts are dishwasher safe on top rack, but hand washing is recommended to preserve appearance.

The brew basket is compatible with the original Series 1 filter basket, so existing owners can use their old parts. The single button is located on the front and is highly sensitive—light touches or even a breath can activate it. The machine lacks a warming plate, so coffee temperature depends entirely on the thermal carafe. The carafe lid can be removed for full pouring access, but when in place, the spout sometimes causes splashing when pouring the last half of coffee. Overall, the design prioritizes brew performance over convenience features, which will appeal to purists.

Shot Quality

The Ratio Six Series 2 excels at producing flavorful, well-extracted coffee, especially with light to medium roasts. Reviewers consistently report that it delivers better extraction than other drip machines like the Moccamaster, Bonavita, and Breville Precision Brewer. The bloom phase and temperature-controlled water flow contribute to a rich, nuanced cup without bitterness. The brew cycle is quick—about 4-6 minutes for a full batch—which helps preserve delicate flavors. The machine lacks a warming plate, so coffee in the thermal carafe stays hot for about an hour if preheated with hot water; otherwise, it cools faster. Some users note that the carafe design can make pouring messy when nearly empty, but this does not affect the coffee quality. The single-button operation is straightforward, but the absence of an auto-pause feature means that removing the carafe mid-brew will result in spillage, as the machine does not stop dispensing water. Overall, the performance is excellent for those who prioritize taste over convenience features.

The shower head ensures even saturation, and the heat shield helps maintain water temperature within the optimal 195-205°F range. The extraction rate is high, meaning more flavor compounds are dissolved into the water. This is particularly beneficial for lighter roasts, which can be under-extracted on less precise brewers. The machine's reproducibility is a strong point—users report consistent results brew after brew. The only performance trade-off is the lack of a keep-warm function, but the thermal carafe mitigates this if used correctly.