Review: Elegoo Mars 4 Ultra 9K 3D Printer – Your New Best Friend

Elegoo Flexes; The Crowd Goes Wild!

3D printers have come a long way since its invention in the early 1980s. Yes, that long ago. Mind you, the average consumer like you or me (well, very rich early adopter version of you or me) only really had access in the mid-2000s. Since then, adoption has reached the mainstream where it’s finally sitting on Junior’s desk working away on his next STEM project.

The Elegoo Mars 4 Ultra 9k promises to advance the capabilities (and expectations) of affordable consumer 3D printers. Does it truly raise the bar and live up to the reputation Elegoo has made for itself?

Stick around and let’s find out.

I remember when my buddy Bruce here at asked me if I’d like to review the ELEGOO Mars 4 Ultra 9k Resin 3D Printer. Holding back my tears of joy, I texted back this simple response: “Yes!!!!” Trust me, when it comes to writers, if you’re using four exclamation points, there is significant joy behind it.

This would be my first MSLA (Masked Stereolithography) printer. Let me tell you (Spoiler Alert!), now that I’ve had this for a little while, I wish I had thrown in a few more exclamation points and broken the carnal rule of no ALL CAPS. Oh, and three mind-blown emojis.

Let Me Introduce You to My New Best Friend (Sorry Bruce)

I don’t use the word “giddy” often, but when this box finally arrived, I was exactly that. Though the box was all beaten up and sloppily retaped (great job, UPS), I was relieved to see that everything inside was just fine and unscathed. Whew! Hulk Smash experience averted.

The Elegoo Mars 4 Ultra 9K is a highly advanced resin 3D printer and boasts impressive features that make this a must-have and the sure winner in the typical “this printer vs that printer” debate. Let’s take a closer look at the features, shall we?

Key Features

What puts the “9K” in the Elegoo Mars 4 Ultra 9K is the 7-inch 9K monochrome LCD screen with a resolution of 8520 x 4320 pixels, providing an 18 x 10 microns XY resolution. This result is incredibly fine detail and high precision.

Not only do you have resolution on your side, this printer also has a decent build volume (195.84 x 122.4 x 250 mm) compared to previous printers in the Mars series. Bring on that high-res two-piece 1:10 scale Iron Man maquette you’ve been drooling over!

Thanks to the powerful COB light source pairs with a Fresnel collimating lens, the UV light is distributed uniformly and in a more perpendicular fashion. This results in smoother surfaces and sharper edges.
There are other cool features, including the z-axis guide rail, plug-in air purifier (my wife thanks you, Elegoo!), laser-etched build plate, and more. But enough of the blah blah blah. How does it print?

Elegoo Flexes; The Crowd Goes Wild

The Mars 4 Ultra 9k is intuitive and relatively painless to set up. (Of course, be sure to read the instructions first!) The filter plugs into the port at the top of the printer body. This printer features a more accurate 4-point leveling system. You’ll quickly find the UI on the 3.5-inch touchscreen is intuitive. It’s deep in features and settings that you’ll want to play with later to improve your craft. After you’ve leveled it and done some test prints, you’ll know your new best friend a little better. It’s time to print.

You can upload your file via the USB port, but this is wifi-capable, so take advantage of that. As you print, you’ll notice that the printer is “quiet enough” but not super quiet. Also, the air filter works very well, but you will still have some VOCs to contend with. I suppose this is simply part of 3D printing life though, isnt’ it? This printer can work at 150mm/hr. The print job pops right off of the plate with ease. No drama there. Now, go clean up your new Iron Man.

Upon close inspection, you will notice something magical about your newly completed project… No layer lines! That’s what’s so wonderful about resin printing, especially at 9k and 18 microns. The details are crisp and defined with very little, if any, pilling. It looks absolutely amazing! (You didn’t even have to do any sanding or swearing or anything else!)

Wrapping It Up

Overall, I have to say that I am thrilled that my very first MSLA is the Mars 4 Ultra 9k. There are certainly higher-end models, both by Elegoo and by competitors. But for the price point and the incredible results, this is the perfect affordable MSLA 3D printer. It has an entry-level price (it’s on sale!) and is great for both beginners and pros alike. Whether you plan to make game pieces, cool looking but useless knick-knacks (Iron Man’s not useless; Jar Jar Binks is) that sit on your office shelf, or molds for high-end custom jewelry, you’ll be able to “get ‘er done” with this.

This is the perfect time to get them too. While the MSRP is US$350, you can buy it directly on Elegoo’s website for $279.99, a $70.01 discount. Or, if you’re a fan of Amazon, get it for less than US$260! WHATTT?!!!

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