Original Prusa MK4S 3D Printer Review – Features, Performance & Verdict

$1,299.00

Brand	ORIGINAL PRUSA
Material	Metal, Plastic
Color	Black Orange
Product Dimensions	19.6″D x 15.7″W x 21.6″H
Item Weight	7 Kilograms

About this item

Starting with 3D printing has never been easier Take the printer out of the box, plug it in, let it run a quick Selftest, and start printing No assembly required. With automatic calibration, always-perfect first layer, one-click printing and many other useful features, the MK4S is the best choice for your home, workshop, or company. All print profiles and configurations are in-house tested ensuring that the MK4S effortlessly delivers top-quality 3D prints at a press of a single button from the very start.
With automatic calibration, one-click printing and an always-perfect first layer, the MK4S is the best entry into the world of 3D printing. Its open design, the result of more than 10 years of evolution, ensures easy maintenance, upgradability and great accessibility. Plus, a detailed handbook guides you through every aspect of the MK4S. When you get the assembled printer, take it out of the box, plug it in and once it finishes the automatic calibration, you can start printing right away.
The printer includes a free 1 kg spool of Prusament PLA Prusa Galaxy Black; Prusa Research offers lifetime technical assistance and 24 hours professional customer service.

The Original Prusa MK4S is a high-performance 3D printer known for its speed, reliability, and print quality, making it a strong choice for both hobbyists and professionals.

Key Features

360° Cooling: A completely redesigned cooling system with a high-pressure turbine and optimized airflow. This is a major factor in improving print quality at high speeds.
High-Flow Nozzle: The printer ships with a high-flow nozzle (based on CHT technology), which significantly increases the filament’s volumetric flow rate, enabling much faster printing.
Nextruder: Features the company’s direct-drive Nextruder with a load-cell sensor for truly automatic, perfect first-layer calibration every time, eliminating the need for manual Live Adjust Z.
Seamless Workflow: Includes an Ethernet port and Wi-Fi with NFC setup, allowing for remote print management via the Prusa Connect system and the new native mobile app.
Material Compatibility: Supports a wide range of materials, including PLA, PETG, ASA, carbon-filled filaments, and flexible materials like TPU.
Open-Source & Modularity: Adheres to Prusa’s open-source philosophy and features an optional GPIO “hackerboard” for custom mods and accessories.

Performance and Quality

Speed: Thanks to the high-flow nozzle, 360° cooling, and optimized firmware with native Input Shaper and Pressure Advance, the MK4S is substantially faster than its predecessors, on par with other high-speed printers.
Dimensional Accuracy: It delivers exceptionally accurate prints, with a mechanical precision tolerance stated by Prusa to be as fine as $\pm 0.05$ mm on all axes after additional calibrations, though typical accuracy is often around $\pm 0.1$ mm to $\pm 0.3$ mm depending on material and calibration. The overall dimensional accuracy is highly praised and is a key strength for functional parts.
Print Quality: It maintains the high print quality expected from Prusa, even at increased speeds. The 360° cooling is particularly effective, allowing the printer to handle overhangs up to $75^\circ$ without supports, which reduces material waste and print time. It consistently produces smooth surface finishes and solid, durable parts with excellent layer adhesion.

Verdict

The Original Prusa MK4S is a highly refined and reliable 3D printer that delivers high-quality results quickly and consistently, largely thanks to its advanced cooling and high-flow extrusion system. While it is generally more expensive than some competitors, its reputation for reliability, excellent customer support, and continuous improvement through open-source innovation make it a superior long-term investment, particularly for users who need a dependable “workhorse” that produces flawless prints with minimal tinkering.