The Elegoo Neptune 4 Pro is a fast, affordable Klipper-based printer hitting 500mm/s with a dual-gear direct-drive extruder and 300°C nozzle. Tom's Hardware gave it an Editor's Choice award for its speed and quality at a low price. Its calibration process is its main weak point, but it remains a strong-value high-speed alternative to the Bambu A1.
Full review
Real-World Performance
The Elegoo Neptune 4 Pro is a fast, value-focused Klipper machine. Tom's Hardware awarded it 4.5 stars and its Editor's Choice, citing super-fast print speeds and excellent quality with a very adhesive print bed. The Klipper firmware enables a 500mm/s top speed, matching the Bambu A1 and Creality KE, and TechGearLab credited it with delivering speed and control at a surprisingly low price point.
Print quality at speed is helped by linear rods and a dedicated part-cooling fan. Dreaming3D described it as a promise of speed and control delivered at a surprisingly low price with up to 500mm/s output. Tom's Hardware did flag that the calibration is a mixed automatic/manual process and is the primary weak point in an otherwise impressive machine, but once dialed in, reviewers find its output fast and clean.
Build Quality and Design
The Neptune 4 Pro is built for fast, reliable printing. It uses a dual-gear direct-drive extruder with a 5.2:1 reduction ratio and a 300°C high-temp nozzle, broadening the materials it can handle, and linear rods improve motion precision at speed. The magnetic PEI build surface is praised by reviewers for its strong adhesion, and the 225x225x265mm build volume is reasonable for the class.
The machine has a responsive touchscreen and a clean layout. As an open-frame design it is not enclosed for high-temp materials despite the capable nozzle, and there is no multicolor support. Build quality is solid for the price, befitting a machine that prioritizes speed and value over premium polish.
Setup and Software
Assembly of the Neptune 4 Pro is straightforward, but its calibration is where it stumbles. Tom's Hardware singled out the mixed automatic/manual calibration as the main weak point, meaning it asks more of the user up front than the fully auto-calibrating Bambu A1. Once configured, however, it runs reliably.
On software, the Neptune 4 Pro benefits from Klipper firmware, giving it speed tuning and open control, and it works with standard slicers. This open approach appeals to tinkerers in the same way the Creality KE does, trading some out-of-box ease for flexibility and performance. Users comfortable with a bit of setup will appreciate the control it offers.
Where It Falls Short
The Neptune 4 Pro's clearest weakness is calibration. Tom's Hardware described the mixed automatic/manual process as the primary weak point, and it is the area most likely to frustrate beginners compared to the hands-off Bambu A1. It also has no multicolor support, so color printing requires the Anycubic Kobra X or a Bambu A1 with AMS lite.
The 225x225x265mm build volume is on the smaller side, and the open frame is not enclosed for high-temp materials despite the 300°C nozzle. These are manageable trade-offs for a fast, affordable machine, but they keep it below the Bambu A1 on overall user experience.
How It Compares to Alternatives
The Neptune 4 Pro matches the Bambu A1 and Creality Ender 3 V3 KE on 500mm/s speed with open Klipper firmware, but its fiddlier calibration puts it behind the A1 on ease and roughly level with the KE for tinkerers. It is faster than the cheaper Ender 3 V3 SE, and unlike the Anycubic Kobra X it has no multicolor.
Its niche overlaps with the Creality KE: a fast, open, single-color Klipper machine for value-minded buyers. The Neptune 4 Pro counters with a higher-temp nozzle and an Editor's Choice pedigree, making it a strong alternative for those who want speed and material flexibility on a budget.
Value at This Price
At around $269-284 (and seen as low as $200 on sale), the Neptune 4 Pro is excellent value, which is why Tom's Hardware named it an Editor's Choice and top-rated budget printer. For the price it delivers 500mm/s Klipper speed, a 300°C direct-drive extruder and linear-rod motion that rivals pricier machines.
The value is highest for buyers who want speed and a capable nozzle on a tight budget and do not mind some calibration work. Beginners who want zero fuss should look at the Bambu A1, and color-printing buyers at the Kobra X. But for fast, flexible single-color printing per dollar, the Neptune 4 Pro is a standout.
Who It's Best For
The Neptune 4 Pro is for budget buyers who want fast, Klipper-based single-color printing with a high-temp nozzle and a strong build surface, and who are comfortable handling some calibration. Its 500mm/s speed and material flexibility make it a capable, affordable workhorse.
It is not the pick for beginners who want hands-off setup (the Bambu A1), buyers who need multicolor (the Anycubic Kobra X), or the absolute lowest price (the Ender 3 V3 SE). But for fast, open, value-focused printing, the Neptune 4 Pro earns its Editor's Choice reputation.
Strengths
- +500mm/s print speed via Klipper firmware for fast output
- +Dual-gear direct-drive extruder with a 300°C high-temp nozzle
- +Linear rods and a part-cooling fan for clean high-speed prints
- +Magnetic PEI build surface with a very adhesive bed
- +Editor's Choice value at a low price point
Watch-outs
- −Calibration is a mixed automatic/manual process, its main weak point
- −No multicolor support
- −Smaller 225x225x265mm build volume
- −Open frame is not enclosed for high-temp materials
How it compares
The Elegoo Neptune 4 Pro matches the 500mm/s speed of the Bambu Lab A1 and Creality Ender 3 V3 KE with open Klipper firmware, and it is faster than the Creality Ender 3 V3 SE, but its calibration is fiddlier and it lacks the multicolor of the Anycubic Kobra X.
Who this is for
At a glance: Budget buyers who want fast Klipper-based single-color printing and a high-temp nozzle for a low price.
Why you’d buy the Elegoo Neptune 4 Pro
- 500mm/s print speed via Klipper firmware for fast output.
- Dual-gear direct-drive extruder with a 300°C high-temp nozzle.
- Linear rods and a part-cooling fan for clean high-speed prints.
Why you’d skip it
- Calibration is a mixed automatic/manual process, its main weak point.
- No multicolor support.
- Smaller 225x225x265mm build volume.
Rating sources
“Super-fast print speeds and excellent quality, with a very adhesive print bed.”
“Delivers speed and control at a surprisingly low price point thanks to its Klipper firmware integration.”
“A promise of speed and control at a surprisingly low price point with a print speed of up to 500mm/s.”
Our 4.5 score is the average of these published ratings. Ratings marked * were derived from the reviewer’s written analysis or video transcript — the publisher didn’t print an explicit numeric score, so we inferred one from their own words. Click through to verify. More about methodology.
