10K-People Global Coffee Tasting Event in Seattle: Exploring Flavor with the STARESSO D9+ Flavor Matrix

TL;DR: A Seattle coffee tasting event showed how one coffee bean can produce three distinct flavor profiles using different burrs. The STARESSO D9+ Flavor Matrix demonstrates how grind design directly impacts taste.

At a recent coffee tasting event in Seattle, one simple question guided the entire session:

👉 Can a coffee grinder change how coffee tastes?

Instead of changing beans, brew method, or water, participants explored something less obvious—but equally important: the impact of burr design on flavor.

Inside the Seattle Coffee Tasting Event

This session was part of the broader 10K-People Global Tasting Event, designed to explore how coffee flavor can be shaped—not just extracted.

Led by coffee professional champion Wenbo Yang, the session brought together coffee enthusiasts to experience a controlled tasting experiment.

The Setup: Same Coffee, Same Brew, One Variable

To ensure a fair comparison, all brewing parameters were kept identical:

Coffee: Panama Lerida Geisha (washed)
Brew method: V60 pour-over
Dose: 20g
Ratio: 1:15
Water temperature: 94°C
Brew time: 2:40

👉 The only variable: the burr used for grinding

Three Burrs, Three Flavor Profiles

Participants tasted three cups made from the same beans, each ground with a different burr:

CLEAN → lighter, tea-like body
BALANCE → sweet, structured, with citrus and stone fruit clarity
RICH → fuller body with deeper sweetness

The result surprised many attendees.

“Are these really the same beans?”

This reaction highlighted a key insight:

👉 Flavor is not fixed—it can be shaped before brewing even begins.

Why Burr Design Changes Flavor

In coffee extraction, grind size is only part of the equation.

Different burr geometries create variations in:

Particle distribution
Surface area exposure
Flow resistance during brewing

These factors influence how water extracts compounds, ultimately changing:

Acidity
Sweetness
Body

This is the foundation behind what’s now being explored as a “Flavor Matrix” approach to grinding.

Brewing Approach: Simplicity Over Technique

During the demonstration, Wenbo Yang emphasized consistency over complexity.

“I like to keep the flow controlled, so the slurry stays stable throughout the brew.”

Instead of aggressive pouring techniques, the focus was on:

Even saturation
Stable extraction
Controlled flow rate

The result: a cleaner and more expressive cup.

What Participants Learned

For many attendees, this was their first time experiencing how much variation a single coffee could offer.

The Geisha used in the session revealed:

Orange and apricot notes
Floral aromatics
Green tea-like clarity

But each burr highlighted these characteristics differently.

👉 This led to a key takeaway:

The grinder is not just a tool—it’s part of the flavor system.

Where the STARESSO D9+ Fits In

The experiment was conducted using the STARESSO D9+ Flavor Matrix grinder, designed to explore this exact concept.

Instead of relying on a single burr, it introduces a multi-burr system that allows users to:

Adjust flavor expression
Explore different profiles from the same beans
Maintain consistency across brewing styles

Combined with a quick-clean design, it also reduces flavor contamination between brews—an often overlooked factor in home coffee setups.

Why This Matters for Home Coffee Drinkers

This type of experiment isn’t just for professionals.

For everyday users, it suggests a shift in how we think about coffee:

From:

“Which beans should I buy?”

To:

“How do I want this coffee to taste?”

Final Insight

The Seattle tasting session demonstrated something simple but powerful:

👉 The same coffee can tell different stories

And with the right tools, those stories can be explored—not just extracted.