During the R&D phase of our Matrix Grinder, we had the honor of inviting Wenbo Yang to participate in product testing. As the D9+ manual coffee grinder officially launches, we are even more privileged to have his support in hosting the first global stop of our Flavor Matrix Tasting Event on March 22 at COZY COFFEE MONSTER in Seattle, USA.
Event Highlights
- Introductory sharing on flavor tasting knowledge
- Two coffee beans personally roasted by Wenbo Yang (a natural-processed 74158 Ethiopia & a washed Panama Geisha), along with their corresponding brewing methods
- Cupping and brewing tastings of each bean using the three burrs of the STARESSO D9+ coffee grinder
The first stop will take place in Seattle. If you're in the area, feel free to message us to check if spots are still available.
For friends in other cities, leave a comment with your location—this global event will continue in major cities worldwide in collaboration with local specialty cafés.
Why We Explore Coffee Flavor Tasting Together?
With factors like variety, origin, processing method, and roasting profiles, coffee flavor can feel like a complex maze - but also an exciting journey.
Since last year, the SCA has introduced the CVA (Coffee Value Assessment), placing unprecedented emphasis on individual preference. What remains unchanged, is the analytical and inductive approach of flavor tasting - an approach that allows us to understand and master our favorite flavors in a more scientific way.
And on this foundation of understanding, we can connect more joyfully, and enjoy exploring coffee flavors together through brewing.

Cupping, smelling the dry aroma, pouring water, breaking the crust, slurping - each step helps unlock your perception of flavor. Sounds professional and challenging? In fact, you can master the basics in just 20 minutes under the guidance of our expert.
We hope to contribute, even in a small way, to making coffee knowledge more accessible to enthusiasts. Cupping is not mysterious, and great flavors are not out of reach.
Everyone who loves life deserves to truly understand the coffee in their cup. That’s the simple intention behind our event.