Our take
MiiCoffee's official channel identifies C38 with SPTK-38G / Solo Compact DC38. Cafe Museo's Korean-language examination describes a compact electric single-dose grinder with a 38 mm conical burr and stepped adjustment. It reports 60 base positions in five-point increments, with an additional turn that can extend the range to 120. The retailer also says a 40 g trial overflowed and recommends roughly 25–30 g; these are observations, not a rated capacity. MiiCoffee's inspected manual library listed no C38 manual, and row ASIN B0BM7YGD42 is not crosswalked to a current offer.
For a home user comparing a compact single-dose workflow who will verify the model label, power supply and removable parts..
Not for buyers who need a confirmed voltage, rated batch capacity, published duty cycle, independently measured retention or grind quality, easy-cleaning certainty, or a verified current item based on the historical ASIN.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- MiiCoffee's official channel connects the C38 name to SPTK-38G and Solo Compact DC38.
- Cafe Museo reports a 38 mm conical burr, stepped control and an observed compact body for label-level comparison.
- The single-dose cup and separate-scale advice make the distinction between collecting grounds and weighing them clear.
What to weigh up
- The technical detail is primarily secondary retailer observation, not a C38 maker manual.
- The reported 25–30 g working dose and 40 g overflow are not rated capacity limits.
- Voltage, wattage, normal duty, cleaning instructions and the row ASIN/current offer remain unresolved.
The key details
| Model covered | C38 / SPTK-38G / Solo Compact DC38 family; row ASIN unresolved |
|---|---|
| Grind and dose controls | 38 mm conical burr; retailer-observed stepped adjustment |
| Capacity and use | Single-dose format; 25–30 g is a retailer recommendation, not a rating |
| Fit and limitations | No row-ASIN crosswalk, electrical rating, normal duty or current offer |
Performance figures are manufacturer claims. Source checked October 1, 2026. Regional models and included accessories can differ.
What the features mean for you
Identity and alias boundary
MiiCoffee's official introduction video uses C38 alongside SPTK-38G and Solo Compact DC38, supporting a family-level name crosswalk. Cafe Museo reports examining a physical SPTK-38G. Those records make the model code more useful than a generic grinder title, but neither maps the frozen ASIN B0BM7YGD42 to an exact current offer or finish. Before relying on the product, check the exact label, included parts and power supply on the listing or unit. The saved manual-library review found other model manuals but no C38 entry.
Adjustment and burr information
Cafe Museo reports a 38 mm conical burr and a stepped dial with 60 base positions in five-point increments. The retailer describes an additional turn that can extend the adjustment to as many as 120 positions. These observations can help a buyer compare the dial's apparent granularity, but they are not a maker's manual specification or a particle-size test. The retailer's statement that the burr is 420 high-nitrogen steel is not confirmed by a C38 manual, so material remains uncertain and should not be used as a quality ranking.
Single-dose routine and scale use
The retailer describes the grinder as single-dose and includes a dosing cup, while advising the owner to use a separate scale because the cup itself does not measure mass. Its article recommends a working dose around 25–30 g and reports overflow during a 40 g trial. That is one retailer's observation, not a rated hopper or grounds limit for every variant. It does mean buyers should not treat the dose cup as a scale or convert the trial result into a guaranteed capacity. Check the supplied cup and instructions for the exact unit.
Compactness has unresolved edges
Cafe Museo reports dimensions of 82 by 120 by 245 mm and a mass near 2 kg, as well as a removable magnetic hopper. Its article warns that a small square key can be difficult to refit and may be lost during cleaning. These are retailer observations, so confirm the parts and measurements against the actual model rather than using them as strict installation gates. The saved sources do not establish voltage, wattage, plug type, duty cycle, replacement-part support, noise or durability. Keep these unknowns visible in any comparison.
Use fit depends on verification
The C38 family may interest a home user seeking a compact single-dose arrangement and a stepped adjustment dial. It should remain a comparison candidate until the offered unit is confirmed by its label and the electrical plate is checked. The saved review does not establish espresso performance, low retention, grind consistency or a normal workload. Cafe Museo's comments about extraction and retention are retailer observations, not independent test findings. No source ties the historical Amazon ASIN to a current offer, so the attached model search is a locator rather than proof of availability.
What else to compare
Before you buy
What names does MiiCoffee use for the C38?
MiiCoffee's official video associates C38 with SPTK-38G and Solo Compact DC38 at the family level.
How many positions does the dial have?
Cafe Museo reports 60 base positions with an additional turn up to 120; no maker manual was listed for C38.
Is 25–30 g a rated capacity?
No. Cafe Museo recommends that working range and reports overflow at 40 g; it is not a manufacturer capacity rating.
Does the dosing cup weigh coffee?
No. Cafe Museo describes a cup and recommends a separate scale; it does not report an integrated scale.
Is ASIN B0BM7YGD42 a current offer?
No exact current offer or ASIN-to-model crosswalk was verified; use the labeled C38 search to locate candidates.
Where can I check the current price?
Use the Amazon link for current offers. Check the exact model, seller, product condition, delivery, and return terms. This page does not display a live price or confirm stock.
Sources & review basis
We use the following manufacturer documentation for the product features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- Cafe Museo SPTK-38G product examination ↗ — checked October 1, 2026.
- MiiCoffee official C38 introduction video ↗ — checked October 1, 2026.
- Cafe Museo SPTK-38G product examination ↗ — checked October 1, 2026.
- MiiCoffee grinder manual library ↗ — checked October 1, 2026.
The decision
MiiCoffee's official channel identifies C38 with SPTK-38G / Solo Compact DC38. Cafe Museo's Korean-language examination describes a compact electric single-dose grinder with a 38 mm conical burr and stepped adjustment. It reports 60 base positions in five-point increments, with an additional turn that can extend the range to 120. The retailer also says a 40 g trial overflowed and recommends roughly 25–30 g; these are observations, not a rated capacity. MiiCoffee's inspected manual library listed no C38 manual, and row ASIN B0BM7YGD42 is not crosswalked to a current offer.
Is it the right fit?
Check the exact model and today’s offers on Amazon.