【 Who Is Gökhan? 】
Gökhan Selamet is the 2025 Turkey Brewers Cup Champion and a bioinformatics scientist by profession.
At the World of Coffee event, he brewed with Femobook’s A4Z and A68 electric grinders, using identical parameters to show how grinder design influences flavor clarity and body in coffee.
【 Gökhan’s Grinder for Competition — Femobook 】
Gökhan shared that he used Femobook electric grinders in both the Turkish National Brewers Cup and the World Brewers Cup.
During the demo, he talked about his experiences with the A4Z and A68, noting that each has its own strengths in grind performance and flavor profile.
His key impressions are summarized below.
【 Uniform Grinding, Minimal Fines, and Exceptional Clarity — The A4Z for Pour-Over 】
Gökhan praised the A4Z for its grind consistency, noting that it produces “almost no fines.”
“If you’re looking for clarity like I do,” he said, “just use a single-purpose grinder like the A4Z.” [1]
Frank
Femobook's Editor
The ZP6, designed specifically for pour-over brewing, is known for its grind consistency and flavor clarity. It was also the hand grinder used by 2023 World Brewers Cup Champion Carlos Medina in his winning routine.
【 I Often Forget When I Last Charged It — The A4Z’s Long-Lasting Battery 】
Gökhan noted that the A4Z is battery-powered [1] and easy to carry around.
Speaking about its capacity, he laughed,
“The battery capacity is really high — I often forget when I last charged it.”
Frank
Femobook's Editor
The battery is user-replaceable, eliminating the need to replace the entire grinder when the battery ages.
【 Bolder Flavor, Fuller Body — The A68’s Cup Profile 】
Gökhan shared that the A68 produces more fines compared to the A4Z, resulting in a cup with bolder flavor and a richer, fuller body.
【 Plug-In Design, Pour-Over and Espresso in One — The A68 as a Versatile Grinder 】
Gökhan noted that the A68 features a plug-in design and is a multi-purpose grinder suitable for both espresso and pour-over brewing. [1]
Frank
Femobook's Editor
【 Gökhan’s Pour-Over Recipe 】
To demonstrate how different grinders impact flavor, Gökhan brewed the same coffee using identical parameters on both the Femobook A4Z and A68.
Recipe
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Coffee dose: 15g
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Coffe-to-Water ratio: 1:16
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Brewer: Flat-bottom dripper
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Total brew time: ≈ 3’18’’
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Water temperature: 89°C
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Coffee: Colombia Mikava / Geisha / Carbonic Maceration / Washed
** He noted that due to Jakarta's humid, low-altitude climate, he lowered the brew temperature from the 93–94°C he uses in Turkey to 89°C for this session.
Pouring Method
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Blooming stage: Zigzag pour
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Main pour: Circular, divided into 3 or 4 pulses depending on the flow rate
** Gökhan explained that since the A68 produces more fines, he uses a gentler pouring technique to avoid over-extraction and bitterness.
【 A4Z vs. A68 — Clarity or Boldness in the Cup 】
During the tasting, Gökhan described the two grinders as delivering distinct cup profiles:
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The A4Z delivers a clean and transparent cup with notes of white florals, peach, stone fruit, and caramel.
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The A68 brings out a bolder, richer cup with a more pronounced caramel sweetness and fuller body.
【 How TrBrC Champion Gökhan Chooses His Grinder 】
During the demo, Gökhan also shared his personal flavor preferences and how they influence his grinder choice.
“Some people enjoy bolder coffee. If that’s your style, just use a multi-purpose grinder (the A68).”
“Personally, I prefer a clean pour-over that lets me taste each note individually and experience the full potential of the coffee.
A high-end grinder like the A4Z helps achieve that clarity — and for me, that’s the most important part of the coffee experience.”
【 Gökhan’s Brewing Tips 】
１. Dripper shape influence flavor
Gökhan explained that conical drippers tend to highlight acidity, while flat-bottom drippers generally produce a sweeter cup.
２. Use a higher brew ratio for high-quality coffee
Gökhan pointed out that high-quality coffee beans often contain more flavor compounds and can handle a higher ratio (e.g., 1:16) for better extraction.
Lower-quality beans, on the other hand, shouldn’t be brewed too strong, as excessive extraction may lead to bitterness and astringency — using slightly less water is recommended.
3. Pour gently when there are more fines
When using a multi-purpose grinder that produces more fines, Gökhan prefers to pour more gently to avoid over-extraction and bitterness.
【Femobook A4Z and A68 Review — Two Grinders, Two Flavor Profiles】
For Gökhan, a grinder directly shapes how a coffee reveals its flavor.
He noted that the A4Z and A68 each have distinct strengths and purposes.
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The A4Z delivers a highly consistent grind with almost no fines, producing a clean, transparent cup where each flavor note can be clearly tasted.
Designed specifically for pour-over, it’s a high-end, battery-powered grinder with impressive battery capacity — as Gökhan laughed,
“I often forget when I last charged it.”
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The A68 generates more fines compared to the A4Z, resulting in a bolder, richer cup with a heavier body.
It's a plug-in, all-purpose grinder suitable for a wide range of brew methods — from espresso to pour-over and beyond.
Both grinders cater to different flavor preferences — in the cup, the A4Z emphasizes clarity and cleanliness, while the A68 brings out a bolder flavor and a heavier body.
WBrC Champion Sherry Hsu compares the Femobook A68 and A4Z electric grinders through brew demonstrations, using id...