Prusa CORE One: The Enclosed CoreXY From the Open-Source Camp
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The CORE One+ (Gen 2) is a 250 × 220 × 270 mm enclosed CoreXY with a 290 °C Nextruder, 120 °C bed and a 55 °C actively heated chamber with smart ventilation so PLA prints with the door closed. It takes the MMU3 and the INDX toolchanger for 4 to 8 tools. Fully open source. It is the Prusa for ABS, ASA and engineering filaments, and the answer to the Bambu P1S and X1C.
Where to buy
Original Prusa CORE One+ DIY Enclosed High-Speed CoreXY 3D Printer Kit
Specifications
| Item | Value | Note |
|---|---|---|
| Build volume | 250 × 220 × 270 mm | 14.9 litres |
| Max nozzle temperature | 290 °C | Nextruder; 400 °C high-temp hotend option |
| Max bed temperature | 120 °C | |
| Chamber | 55 °C, actively heated | Smart ventilation for PLA with door closed |
| Multi-material | MMU3 (5) or INDX (4 to 8 tools) | INDX is a true toolchanger |
| Belts | GT1.5 | Finer surface pattern than GT2 |
| Frame | Steel exoskeleton | |
| Filtration | Optional HEPA | For offices and schools |
| Camera | Yes | Prusa Connect |
| Open source | Hardware and firmware |
What it does that others do not
- Heated chamber at this price class. 55 °C actively controlled puts it in the same material class as the Qidi Q-series and above the passive Bambu P1S and X1C. See layer cracking for what a chamber fixes.
- INDX toolchanger. Up to eight tools with no purge, on a desktop machine; the alternative is the Prusa XL or Bambu H2D dual nozzle.
- PLA with the door closed. Ventilation flaps cool the chamber for PLA rather than making you open the door.
- Open source and repairable. The Prusa promise, in a box.
Trade-offs
- 290 °C standard hotend; the 400 °C upgrade is a separate purchase.
- Price above the Bambu P2S and Creality K2 family for a smaller bed.
- Amazon US stock is thin and marked up; buying direct from Prusa is the norm.
Against the alternatives
The MK4S is the same electronics without the box; see MK4S vs CORE One. The Bambu X1C has lidar and a bigger ecosystem but a passive chamber; see CORE One vs X1C. A spare print sheet is the first accessory.
The units in the box
The listings are the CORE One+ assembled, the CORE One+ kit and the original CORE One kit. Prices on Amazon are typically above Prusa direct.
FAQ
Can an MK4S be converted? Prusa sells a conversion kit from MK4/MK4S to the original CORE One.
Is INDX available now? Prusa lists it as an upgrade; check current availability.
LayerWalker
Print defect diagnosis, calibration procedures and parts that actually fit. Corrections welcome through the contact page.
