Big Prints. Fast Speeds. Klipper-Powered. The Elegoo Neptune 4 Max is built for makers who think on a large scale. With a 420 × 420 × 480 mm build volume — big enough to print full-size helmet shells, large architectural models, and oversized functional parts in a single run — it removes the size constraints that hold most desktop FDM printers back. And it doesn't sacrifice speed to get there. The Neptune 4 Max reaches print speeds of up to 500 mm/s with an acceleration of 8,000 mm/s², powered by Klipper firmware straight out of the box. Klipper gives you direct access to advanced tuning, input shaping, and pressure advance — the kind of control that experienced makers and tinkerers rely on to push print quality and speed to their limits. If you know Klipper, you know exactly what that means. If you're new to it, you're about to. Designed for makers and creators who need room to build — perfect for: Large cosplay armor, helmet shells, and full-scale prop builds Oversized architectural models, interior design mockups, and scale prototypes Full-size RC car bodies, drone airframes, and large mechanical assemblies Batch printing — run multiple parts simultaneously across the full build plate Large decorative pieces, sculptures, and home decor that can't be split across multiple prints Functional large-format parts: panels, enclosures, frames, and structural components Any project that's been waiting for a printer big enough to handle it in one piece Printer Compatibility: Compatible with standard 1.75mm FDM filaments, including PLA, PETG, and TPU. Technical Specifications Printing Technology: FDM Build Volume: 420 × 420 × 480 mm Print Speed: Up to 500 mm/s Max Acceleration: 8,000 mm/s² Firmware: Klipper Filament Diameter: 1.75mm
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