Prusa Research SL1S SPEED

The Prusa SL1S SPEED is a resin-based SLA 3D printer built by Prusa Research, engineered as a faster, more capable successor to the original Prusa SL1. It uses a high-power monochrome LCD masking display paired with a parallel LED UV array to cure photopolymer resin layer by layer, delivering exceptional print speeds without sacrificing the fine surface detail that resin printing is known for. The monochrome display allows for much quicker cure times per layer compared to standard RGB LCD panels, meaning models that once took hours can now be produced significantly faster, making it a strong choice for users who need rapid iteration on detailed miniatures, jewelry patterns, dental models, or engineering prototypes.

On the bench

Build quality on the SL1S SPEED reflects Prusa's engineering philosophy, with a sturdy aluminum chassis, a removable resin tank system, and a validated, calibrated optical assembly that ensures consistent exposure across the entire build platform. The printer features a 5.96-inch monochrome LCD with a resolution suited for capturing intricate geometries, and its exposure display is rated for extended lifespan under heavy use, reducing long-term operating costs. Integrated air filtration and a resin vat designed for easy cleaning and swapping add to the practical, workshop-friendly design, while the sealed hood helps minimize resin fumes during operation, an important consideration for anyone printing resin indoors or in shared spaces.

Living with it

Software-wise, the SL1S SPEED works seamlessly with PrusaSlicer, Prusa's open-source slicing software that includes tuned profiles for a wide range of third-party and Prusa-branded resins, giving users fine control over supports, exposure times, and print orientation. Connectivity options include Wi-Fi, Ethernet, and USB, allowing convenient file transfer and remote print monitoring. Combined with Prusa's reputation for responsive customer support, extensive documentation, and an active user community, the SL1S SPEED stands out as a reliable, professional-grade resin printer suited for hobbyists scaling up their operations as well as small studios and businesses that require dependable, high-throughput resin printing.