Bambu Lab AMS 2 Pro Complete Guide: Specs, Drying, Power, Install and Troubleshooting
The AMS 2 Pro holds four spools, dries filament at up to 65 °C, and can be chained with other units for up to 24 filaments. Power and drying rules depend on your printer. This page collects the key facts and links to a guide for each task. Last checked October 25, 2026.
This hub page collects what Bambu Lab’s own pages say about the AMS 2 Pro as of October 25, 2026. It is researched, not hands-on tested. Firmware changes drying and compatibility details, so use the linked guides and Bambu’s wiki for the latest.
Key facts
| Item | What Bambu says |
|---|---|
| Capacity | 4 spools per unit |
| Chaining | Up to 4 AMS 2 Pro and 8 AMS HT, 24 filaments total |
| Drying | Up to 65 °C, with an electro-magnetic air vent; spools rotate during drying |
| Filament settings | RFID sets drying settings for official Bambu filament |
| Feeding | Brushless motor; Bambu says up to 60% faster feeding |
| Size | 372 x 280 x 226 mm, 2.5 kg |
| Standalone use | It cannot dry without a connection to the printer |
| Limits | Some filaments need more than 65 °C; Bambu recommends the AMS HT for those |
Guides
- Compare: AMS 2 Pro vs original AMS
- Install on a P1S: upgrade kits, tubes, cables and the first load
- Power: when you need the Switching Adapter
- Tool: power adapter calculator, to count the adapters you need
- Drying: how to dry, and what Bambu says about drying while printing
- Chart: drying temperatures by material, compared with the AMS 2 Pro and AMS HT maximums
- Troubleshooting: LED lights and what to check when filament won’t load
The questions people ask most
Do I need the power adapter? Not for feeding alone. For drying, X1 and P1 need one per drying unit, and H2D and H2S can power one unit directly.
Can it dry while printing? It depends on your printer and whether that unit is part of the print, and Bambu’s pages word it differently. The drying guide shows each statement.
Does it work with my printer? Bambu says it is compatible with its printers. X1 and P1 owners need extra accessories.
What is not covered yet
Spool jumping and roller lock, step-by-step unloading, and power rules for the A1, X1E and newer printers. I could not find official Bambu pages for these, so I have left them out rather than guess.