— PRUSA RESEARCH · FDM
Prusa MK4S
MK4 with a refined hot-end. Faster, quieter, same workflow.
Prusa's incremental upgrade to the MK4. New Nextruder revision with higher max flow, refined input-shaper tuning, same self-test calibration. Existing MK4 owners can upgrade for €299; new buyers get it standard.
— Specs
The numbers that matter.
Build volume
250×210×220mm
Max print speed
250mm/s
Nozzle
0.4mm
MSRP
€829
Enclosure
Open frame
Multi-color
Single-color
Auto bed-level
Hands-off
— Use cases
When the Prusa MK4S is the right call.
Best for
- MK4 buyers in 2026 — only buy MK4S now
- Small print farms valuing 24/7 uptime
- Engineering parts that benefit from input-shaper tuning
- Klipper-curious users who want stock-firmware Klipper-like speeds
Avoid for
- MK4 owners who already upgraded to S — no incremental gain
- Multi-color out of the box (MMU3 still finicky)
— Honest assessment
Pros & cons after using one.
Pros
- Higher max-flow Nextruder — ~25% faster on infill vs MK4
- Same open-source firmware and unbeatable spare-part economy
- Self-test runs every print start — first-layer disasters rare
- Replaceable nozzles in seconds (0.25–0.8mm)
Cons
- Still bed-slinger — Z-wobble at 220mm height under high speed
- Multi-color via MMU3 is a tinkerer's project, not plug-and-play
- No enclosure (Prusa Enclosure sold separately at €349)
— Compatible materials
What this printer is calibrated for.
— Owner tips
What we'd tell someone unboxing one.
- 1Enable input shaper in firmware — defaults are conservative
- 2Stock textured sheet is the right pick for general use
- 3MMU3 needs a tidy filament path; route it cleanly or jams cascade
— Compare
Also worth considering.
— Try this printer