# Prusa Research Original Prusa MK4S review

Reliable open frame Prusa with top print quality, kit or assembled

- Our score: 7.7 out of 10
- Price: $999 (checked Oct 27, 2026)
- Status: on sale
- Best for: quality focused makers who like to tinker
- Skip if: you want an enclosure or multi color included
- HTML version: https://robotsforthat.com/robot/prusa-mk4s/

## Verdict

The MK4S is a proven open frame Prusa that prints very cleanly, runs quietly and can be bought as a kit for $709. It suits people who value print quality, repairability and support over the lowest price. Skip it if you want ABS without buying an enclosure or want multi color in the box.

## Pros

- Excellent print quality in reviews
- Very quiet in Tom's Hardware testing
- Kit option at $709
- Load cell auto leveling
- Free software and no subscription

## Cons

- Costs more than Bambu printers of similar size
- No enclosure without an add on
- Multi color needs the paid MMU3
- Only a 1 year warranty in the US

## Specs

- build volume: 250 x 210 x 220 mm
- print speed: No max speed published; Tom's Hardware measured 24 mm3/s volumetric flow with Prusament PLA
- multi color: Optional MMU3 upgrade
- enclosure: No, open frame; optional Original Prusa Enclosure
- auto leveling: Yes, automatic mesh bed leveling with a load cell sensor
- max nozzle temp: 290 C
- heated bed: Yes, up to 120 C
- filament types: PLA, PETG, Flex, PVA, PC, PP, CPE, PVB; ABS, ASA, HIPS, PA with the enclosure and filtration add on
- connectivity: Wi-Fi module included, NFC, USB drive
- noise: Tom's Hardware found it very quiet, suitable for a shared office
- assembly: Sold assembled or as a kit; Tom's Hardware estimates about 8 hours to build the kit
- weight: 7 kg; 500 x 550 x 400 mm

## Safety

- recalls: No recall found as of 2026-10-27 (web search of cpsc.gov for Prusa Research)
- fcc: Not checked
- company status: Active
- warranty: 1 year for buyers outside the EU, including the US (Prusa knowledge base)

## Questions buyers ask

### Should I buy the kit or assembled?

The kit saves $290 on the Prusa store today. Tom's Hardware estimates the build takes about 8 hours.

### Can it print ABS?

Prusa lists ABS, ASA, HIPS and PA only when using the Original Prusa Enclosure with the filtration add on.

### Does it have Wi-Fi?

Yes. Prusa ships the ESP Wi-Fi module with the printer.

## Sources

1. [Prusa store: Original Prusa MK4S](https://www.prusa3d.com/product/original-prusa-mk4s-3d-printer-5/)
2. [Prusa store: 3D printers](https://www.prusa3d.com/category/3d-printers/)
3. [Prusa knowledge base: Warranty](https://help.prusa3d.com/article/warranty_2288)
4. [Tom's Hardware: Prusa MK4S review](https://www.tomshardware.com/3d-printing/prusa-mk4s-review)
5. [TechRadar: Original Prusa MK4S review](https://www.techradar.com/pro/original-prusa-mk4s-3d-printer-review)