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PrintSignals
Prusa MK4S

Prusa MK4S

WAIT

A direct successor has been released. Firmware and support remain active.

Signals last verified: 17 July 2026

Signals: Lifecycle · Firmware · Support · Spare parts. What we track

Note: The MK4S has a CORE One conversion path, so Prusa is still protecting the platform, but CORE One is the newer direction.

Where to buy

Official SiteAmazonFilament2Print

Specifications

Build volume
250x210x220 mm
Build size class
Small - Shoebox
Price
Base: €999 · Combo: €1,609
Enclosure
Open frame
Chamber control
None
Materials
PLA · PETG · PHA · PVB · TPU · TPE · TPC · PEBA
Support materials
—
Bowden extruder
—
Max hotend temp
290°C
Max bed temp
120°C
Max chamber temp
—
Nozzle material
Brass
Hardened nozzle
—
Nozzle count
1
Max filament inputs
5
True multi-material
—
Tool change
Single Nozzle Purge Based

Ownership

Experience level
Beginner-friendly
Assembly
Minimal
Auto bed leveling
Automatic
Auto Z offset
Yes
Auto first layer
Yes
Filament runout sensor
Yes
Spaghetti detection
—
Error guidance
QR Direct
Warranty
24 months
Warranty extension
Yes optionally · extends warranty length
Spare parts
Comprehensive
Firmware version
V6.5.7

Unlockable capabilities

With hardened nozzle upgrade:
Abrasive materials

Real-world performance

Who this is for

The MK4S is a genuinely good printer sold at an awkward moment. Everything reviewers say about it is positive: fast, quiet, reliable, excellent quality, easy to live with, well-supported on parts and documentation. But a direct successor, the Core One, is already shipping, and that's the fact that decides this purchase. For a first-timer, the MK4S is easy to succeed with and hard to fault on setup, but paying list price for last generation when the current one is available is a weak position, so price the Core One before you commit. For a home hobbyist, know the ceiling going in: this is a standard-materials, open-frame machine, strong with PLA, PETG, PHA, PVB and flexibles, but not built for ABS, ASA, or high-temperature work without the enclosure it doesn't have. For a prosumer weighing it as a business tool, the reliability and parts availability are real strengths, but buying the superseded generation raises exactly the lifecycle risk you're trying to avoid. The honest call: if you already own one or find it discounted, it's a keeper that will serve you well. If you're buying new at full price, look at the Core One first, or buy the MK4S knowing the conversion kit exists as your bridge to it.

PrintSignals Review

Prusa MK4S Review

Written by AI from manufacturer specifications and the aggregated consensus of

PrintSignals does not test printers hands-on. How we do this

Assessment

The MK4S is a capable, beginner-friendly printer that reviewers rate highly on the things that matter day to day: fast prints, excellent output quality, reliable operation, and quiet running. The problem isn't the machine, it's the timing. Prusa has already replaced it. A direct successor, the Core One, is shipping now, and that changes the buying calculation more than any spec on this page. Firmware for the MK4S is still active and has been updated within the last 90 days, so this is not an abandoned model. But when you can buy the current generation instead, paying full price for the one it replaced needs a reason. If you own an MK4S already, or find one discounted, the strong reviewer track record still holds. If you're deciding fresh at list price, look hard at the Core One first, and note that Prusa sells an official conversion kit that upgrades this machine into a Core One later.

Build and print volume

The build area is 250 x 210 x 220 mm, enough for most functional parts, desk pieces, and moderate-sized models, but not large single-piece prints. It's an open-frame bed-slinger, so there's no thermal containment around the print. That's the single most important hardware fact here, because it sets the material ceiling. Automation is where the MK4S pulls its weight: automatic bed leveling, automatic Z-offset and first-layer calibration, and filament runout detection all come standard, with print failure detection available through the add-on. There's no built-in camera, so if you want to watch prints remotely you'll need an external solution.

Material capability

The reliable range is PLA, PETG, PHA, and PVB, and reviewers rate material handling across that range as good in practice. The direct drive extruder handles flexibles well, with TPU the most accessible; TPE, TPC, and PEBA are supported too, though each one asks more of your tuning as you go. The hotend reaches 290°C and the bed 120°C, but don't read those numbers as a green light for engineering materials. The open frame has no enclosure to hold heat around the part, which keeps the practical range to warp-stable filaments and makes ABS and ASA a poor fit, they'll warp and split without thermal containment. The stock nozzle is brass, not hardened, so abrasive filaments require a hardened nozzle upgrade before you run them. Within its lane the MK4S is a strong performer. Just know the lane is standard, warp-stable materials, not the high-temperature end.

Setup and ownership

This is one of the easier printers to start on. The pre-assembled unit arrives near-fully built and is usually printing in under 15 minutes, and the firmware abstracts away most of the complexity while staying well-documented for the moments it doesn't. When something goes wrong, on-screen QR codes link straight to the fix for that specific error, which is about as actionable as first-run guidance gets. Maintenance is rated manageable, with clear procedures. Two practical notes: fumes are noticeable in use, so run it in a ventilated space, and the MK4S also sells as a self-assembly kit, which reviewers call an involved build that's still accessible to beginners. Confirm which version you're buying, because the easy setup above describes the pre-assembled unit. The printer alone runs around €1,000. Adding the multi-spool system brings the total to roughly €1,600. On the software side you're not locked in: PrusaSlicer is the official tool and rates well, and Orca and Cura both work. Klipper has no native support, only community ports.

Support and longevity

On paper the ownership foundation is strong. Prusa offers comprehensive official spare parts, an extended warranty option, strong documentation, and reviewers rate long-term durability well, with no notable component wear reported over extended use. The ecosystem is semi-open: Buddy firmware is AGPL and on GitHub, third-party slicers are accepted, and the hardware design files, delayed at first, are now public. One caveat worth carrying into the decision: while Prusa has generally acknowledged hardware issues publicly, reviewers note that how those issues actually get resolved has been inconsistent. The bigger longevity question is lifecycle, not parts. This is the previous generation, and while firmware support is active today, you're buying a machine one step behind the current model. The upside specific to Prusa is that the official Core One conversion kit gives this hardware a forward path rather than a dead end.

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