Bambu Lab AMS HT
The Bambu Lab AMS HT is a single-spool tower-format dryer with active drying up to 85°C — the highest temp of any Bambu AMS. It's the only AMS that works with the A1 series AND the P1S/X1C, making it the most universal Bambu spool solution. Designed for engineering filaments (PA-CF, nylon, PC) that need temps the AMS 2 Pro's 65°C ceiling can't reach.
The right buy if you print PA-CF, PA, or other engineering filaments — or if you own an A1 and need active drying that the AMS Lite can't deliver.
Where to Buy
Pros
- 85°C max drying temp — only Bambu AMS that hits temps required for PA-CF, PA, and PC filaments
- Universal compatibility — works with A1, A1 Mini, P1S, P1P, X1C, X1E, and H2D (the AMS 2 Pro doesn't support A1)
- Vertical tower form factor saves desk space — fits on a shelf or beside the printer where the horizontal AMS won't
- Up to 8 AMS HT units chainable per printer = 8 dedicated drying towers for engineering filament workflows
- Backward compatible with existing AMS setups — daisy-chain alongside original AMS or AMS 2 Pro for hybrid material routing
Cons
- Single-spool only — for multi-color prints, you still need an AMS or AMS 2 Pro alongside
- $249 for ONE spool of active drying is expensive vs the SUNLU S2 at $45 (but the S2 doesn't integrate with Bambu Studio)
- 80W draw at 85°C drying — highest power consumption of any Bambu AMS
- Tower form factor takes vertical space (365mm tall) that may not fit under a shelf
85°C Drying: The Engineering-Filament Differentiator
The AMS HT is the only Bambu AMS that hits 85°C — 20°C higher than the AMS 2 Pro's 65°C ceiling. That difference is the entire point of the product. Recommended drying temps for engineering filaments: PA (nylon) 70-80°C, PA-CF 70-80°C, PC (polycarbonate) 80°C, glass-filled nylon 80-85°C. The AMS 2 Pro can technically dry these materials but takes 2-3x longer at 65°C and produces marginal results. The AMS HT dries them properly in standard 4-8 hour cycles.
This matters most for PA-CF, which is one of the few "engineering" filaments that prints reliably on Bambu printers without an enclosure-temp-controlled chamber. PA-CF absorbs moisture aggressively — within 2-4 hours of opening a fresh spool in humid conditions. Without active drying at proper temperatures, PA-CF prints develop visible bubbling, layer adhesion failures, and surface roughness that defeats the entire purpose of using carbon-fiber filament. The AMS HT keeps PA-CF print-ready continuously at 75°C without you babying the spool.
The 85°C ceiling is also the maximum Bambu printers themselves can handle — going higher would risk the printer's chamber components and bed adhesion. PEEK and ULTEM (which need 100-150°C drying) aren't supported by Bambu printers anyway, so the AMS HT's 85°C limit isn't actually a constraint for any filament you can use on a Bambu.
Universal Compatibility: The Only AMS That Works on A1
The AMS HT is the most flexible Bambu AMS in terms of printer compatibility. It works with the A1, A1 Mini, P1S, P1P, X1C, X1E, and H2D — the entire current Bambu lineup. The AMS 2 Pro doesn't support the A1 series. The original AMS doesn't support A1 either. The AMS Lite (the A1's official 4-spool solution) is passive-only with no active drying. So the AMS HT is the ONLY way for A1 owners to get active drying for engineering or hygroscopic filaments.
This universal compatibility comes from the tower form factor — instead of a horizontal box that mounts on the printer's right side (the AMS 2 Pro layout), the AMS HT is a freestanding vertical tower that connects via a cable. It can sit on a shelf, beside the printer, or stacked next to other AMS units. The connection works the same way across all printer models.
For users who plan to upgrade printers in the future (e.g., A1 owner planning to buy a P1S next year), the AMS HT is a hedge: it works on both. Buy an AMS Lite for now, add an AMS HT for engineering filaments, and the AMS HT carries forward to whatever Bambu printer you upgrade to. The original AMS or AMS 2 Pro requires re-purchasing if you switch printer ecosystems.
Single-Spool Trade-Off and Mixed AMS Strategies
The AMS HT holds one spool. For multi-color or multi-material printing, you still need a 4-spool AMS or AMS 2 Pro. Bambu's intended workflow is to mix-and-match: use a 4-spool AMS for everyday colors and an AMS HT for one specialty filament that needs special drying. Bambu Studio's per-filament drying profiles route automatically based on material assignment — you don't manually toggle anything during slicing.
A practical setup for an X1C engineering shop: AMS 2 Pro with 4 spools of common materials (PETG black, PETG white, TPU 95A, ABS) running at 55°C, plus an AMS HT with one spool of PA-CF running at 75°C. Total 5 materials, all properly dried for their type. Total cost: $349 (AMS 2 Pro) + $249 (AMS HT) = $598 — significant but the only way to get this material breadth on a Bambu printer with proper handling.
For users who only need ONE material at a time but rotate frequently, the AMS HT alone is sufficient: load PA-CF for an engineering print job, swap to nylon for the next, swap to PETG for the next. The single-spool design makes loading/unloading fast (no carousel mechanism), and the active drying activates whenever a new spool is detected. This is genuinely the right pattern for prosumer users who don't run multi-color but do print across multiple materials.
Common Gotchas
Tower height (365mm) is the most common surprise. The AMS HT is taller than the AMS 2 Pro and won't fit under desk shelves with 30cm clearance. Measure your printer's planned location BEFORE buying. The footprint is small (245x245mm) but the vertical clearance is critical. Many users put the AMS HT on a side table beside the printer rather than directly on the printer's frame.
80W power draw at 85°C is the highest of any Bambu AMS. At full continuous drying (which you wouldn't normally run), that's about 5-6 kWh/month at typical US rates. The AMS HT does duty-cycle automatically when the printer is idle, but if you're running engineering filament jobs back-to-back with continuous drying, it's a measurable cost. Worth it for PA-CF print quality, but plan for it if you're cost-conscious.
Single humidity sensor means the AMS HT can't compare conditions across multiple chambers like the AMS 2 Pro can — but with one spool, there's only one chamber to monitor anyway. Not actually a drawback for the form factor.
PA-CF and other abrasive filaments wear PTFE tubes and brass nozzles faster. The AMS HT itself is fine, but plan for hardened-steel nozzles ($8-15) and replacement PTFE tubes ($10) on the printer side. Active drying enables you to USE these abrasive materials — but you still need the right printer hardware to print them without destroying nozzles.
Firmware support is good but slightly behind the AMS 2 Pro for the newest features (per-spool drying schedules, advanced humidity logging). Both AMS HT and AMS 2 Pro get monthly Bambu firmware updates; the AMS 2 Pro typically gets new features 1-2 months earlier as the higher-volume product.
Full Specifications
I/O & Interfaces
| Specification | Value |
|---|---|
| connection | Direct cable to printer (24V + comms) OR daisy-chain to existing AMS [1] |
Power
| Specification | Value |
|---|---|
| Input Voltage | 24V from printer [1] |
| power_consumption | 80W max during active drying at 85°C (idle ~5W) [1] |
Physical
| Specification | Value |
|---|---|
| capacity | 1 spool (250g-1kg, up to 200mm diameter) [1] |
| Form Factor | Vertical tower (saves desk space vs horizontal 4-spool AMS) [1] |
| Dimensions | 245 x 245 x 365 mm [1] |
| weight_g | 3200 g [1] |
Who Should Buy This
The AMS HT is the ONLY active-drying option for the A1 series — the AMS Lite is passive only, and the AMS 2 Pro is incompatible with A1. If you print PETG, nylon, or TPU on an A1, the AMS HT is the only Bambu solution.
PA-CF needs 70-80°C drying for usable surface quality. The AMS 2 Pro caps at 65°C — close but not enough for serious engineering work. The AMS HT's 85°C ceiling enables filaments the AMS 2 Pro can't handle properly.
The AMS HT is single-spool. For multi-color rigs, the AMS 2 Pro ($349, 4 spools) or original AMS ($249, 4 spools) are the right buy. You can ADD an AMS HT later for a single specialty material if needed.
Better alternative: Bambu Lab AMS 2 Pro
PLA is barely hygroscopic and the A1's AMS Lite ($149) handles it perfectly. Save $100 vs the AMS HT — you don't need active drying for PLA in normal indoor conditions.
Better alternative: Bambu Lab A1 Mini
Daisy-chain an AMS HT alongside your AMS 2 Pro. Route PETG / nylon / TPU through the AMS 2 Pro at 55-65°C; route PA-CF and engineering filaments through the AMS HT at 75-85°C. Per-material drying profiles in Bambu Studio handle the routing automatically.
Better alternative: Bambu Lab AMS 2 Pro
The AMS HT's 245x245mm vertical footprint fits on a small shelf or beside the printer where the AMS 2 Pro's 385x260mm horizontal footprint won't. Trade-off is single-spool vs 4-spool — only worth it if space is the constraint.
Better alternative: Bambu Lab AMS 2 Pro
Ecosystem & Community
The AMS HT plugs into the same Bambu Studio + OrcaSlicer ecosystem as the AMS 2 Pro and original AMS. Per-filament drying profiles are slicer-controlled. Backed by a 200K+ member r/BambuLab community with active engineering-filament discussions on MakerWorld.
Compatible Software
What to Build First
Print structural mounting brackets in PA-CF using the AMS HT for proper 75°C drying. PA-CF is one of the strongest filaments printable on consumer 3D printers when handled correctly — the AMS HT's high-temp drying eliminates the moisture-related quality failures that ruin most attempts at engineering filament printing.
View tutorial →Must-Have Accessories
Video Reviews & Tutorials
Tutorials & Resources
- Bambu Lab AMS HT official wikiSetup guide, drying profile reference, and per-filament temperature recommendationsdocs
- Bambu Studio (slicer with AMS HT support)Open-source slicer that controls AMS HT drying profiles per filament typegithub
- OrcaSlicer (community Bambu fork)Community-maintained slicer with broader filament profile library and additional AMS HT featuresgithub
Frequently Asked Questions
Can I use the AMS HT with my Bambu A1 Mini?
Yes. The AMS HT is the only Bambu AMS that works with the A1 series — A1, A1 Mini, plus P1S, P1P, X1C, X1E, and H2D. The AMS 2 Pro and original AMS are NOT compatible with A1 series. The AMS Lite works with A1 but is passive only.
Why is the AMS HT only single-spool?
The 85°C drying temp requires more thermal isolation per spool than a 4-chamber design allows. Bambu chose single-spool to keep the price reasonable and target the engineering-filament use case where you typically print one material at a time. Multi-color users should buy the AMS 2 Pro instead.
Should I get the AMS HT or AMS 2 Pro?
AMS 2 Pro for multi-color printing (4 spools, 65°C max). AMS HT for single-material engineering work or A1 compatibility (1 spool, 85°C max). They're complementary — many prosumer setups use both.
What filaments need 85°C drying?
PA-CF (nylon-carbon-fiber) at 70-80°C, PA (nylon) at 70-80°C, PC (polycarbonate) at 80°C, glass-filled nylon at 80-85°C. PETG, TPU, and PLA all dry fine at 50-65°C and don't need the AMS HT specifically.
Can I daisy-chain AMS HT with AMS 2 Pro?
Yes. They use the same connection protocol. Most prosumer setups daisy-chain one AMS 2 Pro (4 common materials) with one AMS HT (one specialty engineering filament). Bambu Studio routes color changes through the appropriate AMS based on slicer material assignments.
How tall is the AMS HT? Will it fit under my shelf?
365mm tall (about 14.4 inches). Measure your shelf clearance — the AMS HT does NOT fit under typical 30cm shelving. Most users place it on a side table beside the printer or on top of a workbench rather than directly on the printer.
Does the AMS HT replace a SUNLU filament dryer?
Yes for Bambu users — the AMS HT integrates with Bambu Studio for automatic drying, while a SUNLU S2 is a manual standalone unit you load and unload. The AMS HT is more expensive ($249 vs $45) but eliminates the swap-spool-to-dryer workflow. Non-Bambu users should stick with the SUNLU.