Bambu Lab AMS HT — Product Spotlight
The Bambu Lab AMS HT is the high-temperature automatic material system, built for users who regularly print with engineering filaments that need drying above 65°C. Where the AMS 2 Pro handles PLA, PETG, ABS, and most composites adequately at up to 65°C, the AMS HT reaches 85°C with an air-tight sealed enclosure, making it the appropriate choice for PA12-CF, PPS, PEI, and other polymers that absorb moisture readily and require sustained high-temperature drying to perform correctly at the nozzle. It is compatible with P1, P2, X1, and H2 series printers.
Why 85°C Drying Matters
Filament moisture is one of the most common causes of poor print quality: absorbed water turns to steam as filament passes through the hotend, producing bubbling, stringing, rough surfaces, and weakened layer bonds in the finished print. Most filaments can be adequately dried at 45–65°C, which is what the AMS 2 Pro provides. However, high-performance engineering polymers including PA12, PA12-CF, PPS, and PEI have higher moisture absorption rates and require drying at or above 80°C for extended periods to reach adequately low moisture levels. At 65°C, these materials can be partially dried but not to the degree that reliable printing at high nozzle temperatures demands.
The AMS HT's 85°C maximum, combined with its air-tight sealed enclosure, addresses this. The sealed housing prevents the dried filament from reabsorbing ambient humidity between the drying cycle and the start of printing — a relevant concern in Australian coastal and tropical environments where ambient humidity can be high enough to re-moisturise filament within hours if stored in an open container.
Brushless Servo Feeding and RFID
The AMS HT uses a brushless servo feeding motor, the same feeding technology as the AMS 2 Pro, providing fast and reliable filament advance and retract cycles during multi-colour printing. RFID readers in each spool slot recognise official Bambu Lab filament and automatically configure the appropriate drying temperature and duration, removing manual setup for supported materials. Third-party filaments can be dried with manually entered settings.
The unit holds four standard spools and supports up to 24 filaments in series when connected with other AMS units, consistent with the rest of the AMS range. Multiple AMS HT units can be combined with AMS 2 Pro units in multi-unit configurations on supported printers, depending on the specific printer model and accessory requirements.
Printer Compatibility and Required Accessories
The AMS HT is compatible with P1, P2, X1, and H2 series printers. It is not compatible with the A1 or A1 Mini without an AMS Hub accessory (SA013). Connecting the AMS HT to different printer models requires specific accessories:
For P1S and X1 series owners connecting a single AMS HT, a PTFE tube coupler (FAZ006), 4-pin cable (CAB002-N), and Filament Buffer (SA003) are required. For connecting multiple AMS units including the AMS HT, a PTFE tube coupler, 4-pin cable, and AMS Hub (SA002-N) are needed instead. For P2S owners connecting up to two AMS units, a Filament Buffer P2S (SA011) and Bambu Bus Cable (CAB035) are required; connecting more than two AMS units additionally requires a 4-in-1 PTFE Adapter (FAZ013-N). For H2S, H2D, and H2C owners connecting more than one AMS unit, a 4-in-1 PTFE Adapter is needed. Note that AMS HT is currently not compatible with the X1E.
When to Choose AMS HT vs AMS 2 Pro
For most users printing with PLA, PETG, ABS, ASA, TPU, and standard composite filaments, the AMS 2 Pro at 65°C is sufficient and is the recommended starting point. The AMS HT makes sense when your workflow regularly involves PA12, PA12-CF, PPS, PEI, or other polymers with high moisture sensitivity and high drying temperature requirements, and where you are already using an H2 series or P2S printer capable of printing these materials reliably. Purchasing an AMS HT for a printer that only handles PLA and PETG would be unnecessary.
Frequently Asked Questions
What filaments specifically benefit from AMS HT over AMS 2 Pro?
Filaments that require drying above 65°C include PA12, PA12-CF, PPS, PEI (PEEK-like polymers), and some high-performance PA blends. These materials absorb moisture quickly and need sustained high-temperature drying — typically 75–85°C for several hours — to reach the low moisture levels required for clean printing at high nozzle temperatures. PLA, PETG, ABS, ASA, TPU, and most PA6-CF and PETG-CF composites can be adequately dried at 65°C and do not require the AMS HT.
Can AMS HT be mixed with AMS 2 Pro units?
Yes. AMS HT and AMS 2 Pro units can be combined in multi-unit configurations on supported printers, allowing different drying requirements to be met across different filament slots in the same setup. The specific configuration and required accessories depend on the printer model.
Is AMS HT compatible with A1 and A1 Mini printers?
The AMS HT requires an AMS Hub accessory (SA013) to connect to A1 and A1 Mini printers. Additionally, the A1 and A1 Mini are open frame printers not suited to the high-temperature engineering filaments that the AMS HT is primarily designed to support, so this combination has limited practical application.
Does the air-tight enclosure make a difference in Australia?
Yes, particularly in coastal and tropical areas. Engineering filaments like PA can reabsorb ambient moisture within hours of drying if stored in an open container in humid conditions. The AMS HT's sealed enclosure maintains a low-humidity environment after the drying cycle, keeping filament in optimal condition until printing begins. This is less critical for PLA and PETG, which absorb moisture more slowly, but makes a meaningful difference for PA and PPS workflows.
Summary
The Bambu Lab AMS HT is the specialist choice for users printing with high-temperature engineering filaments that require drying above 65°C. Its 85°C maximum drying temperature, air-tight sealed enclosure, and brushless servo feeding motor make it the right AMS unit for demanding PA, PPS, and PEI workflows on H2 and P2 series printers. For users whose material range stays within PLA, PETG, ABS, and standard composites, the AMS 2 Pro is the more appropriate and cost-effective option. View the Bambu Lab AMS HT at Everyday Home Living, and browse the full 3D Printers collection.