Can the Kobra S1 print ABS and ASA without warping?

Yes. The fully enclosed chamber keeps heat in and blocks drafts, which is what ABS and ASA need to avoid warping. The 320 °C hotend covers their higher print temperatures.

How fast can it actually print?

Anycubic rates it at up to 600 mm/s with 20,000 mm/s² acceleration, but recommends around 300 mm/s for quality. Real speed depends on the filament and profile you use.

Is it loud enough to matter in a shared room?

In silent mode it is rated at about 44 dB, roughly the level of a quiet conversation. Normal high-speed printing will be louder.

Does it come assembled?

It ships pre-assembled, so setup is mostly unboxing, removing packing and running the first calibration rather than building the frame.

What software does it use?

It works with Anycubic Slicer Next and the Anycubic app for remote control. Both are included, so you do not need a separate slicer to start.

Is the 250 mm build volume enough?

It covers most helmets-in-parts, functional prints and prototypes. Very large single-piece models will need splitting, which is the main trade-off against bigger open-frame printers.