— PRUSA RESEARCH · FDM
Prusa MK4
Czech-built workhorse. Everything is repairable.
Prusa's flagship i3-style printer. Loadcell-based first-layer calibration, 32-bit board, swappable nozzles with Nextruder hot-end. Slower than Bambu but every part is replaceable, every firmware open-source.
— Specs
The numbers that matter.
Build volume
250×210×220mm
Max print speed
200mm/s
Nozzle
0.4mm
MSRP
€799
Enclosure
Open frame
Multi-color
Single-color
Auto bed-level
Hands-off
— Use cases
When the Prusa MK4 is the right call.
Best for
- Long-haul reliability — many of these run 24/7 in print farms
- Engineering parts where consistency beats top speed
- Tinkerers who like fully open hardware
- PETG and ABS on the MK4 + enclosure combo (sold separately)
Avoid for
- Speed freaks (200mm/s feels slow next to Bambu)
- Multi-color out of the box (MMU3 add-on is a tinkerer's project)
- Anyone unwilling to wait 6–8 weeks for delivery in EU/US
- Tight budgets — €799 is twice the A1's price
— Honest assessment
Pros & cons after using one.
Pros
- Open-source firmware, schematics, and slicer (PrusaSlicer)
- Self-test calibration run on every print start
- Replaceable Nextruder nozzles — 0.25mm to 0.8mm in seconds
- Outstanding support reputation (Prusa replaces broken parts free)
Cons
- Slower than competitors at the same price point
- Open frame; ABS needs the Enclosure (€349)
- MMU3 multi-material add-on is finicky
- Z-height 220mm caps tall prop work
— Compatible materials
What this printer is calibrated for.
— Owner tips
What we'd tell someone unboxing one.
- 1Ship-of-Theseus this thing — every part has a Prusa-published spare
- 2Smooth PEI bed: ABS slurry on first use, then nothing for 100 prints
- 3Enable 'Input Shaper' in firmware for cleaner ringing at 150mm/s+
- 4Spool holder above the unit — side-loaded spools cause flow drift
— Compare
Also worth considering.
— Try this printer