Bambu Lab’s Automatic Material System (AMS) series revolutionizes multi-material 3D printing, but as the ecosystem expands—with AMS 2 Pro, AMS HT, AMS lite, and new printers—compatibility and connection limits can get confusing. This guide demystifies which AMS units work with which printers, how many you can connect, and what accessories or power solutions you’ll need for seamless multi-color printing.

AMS 2 Pro and AMS HT: Compatibility at a Glance

Bambu Lab’s latest AMS units—AMS 2 Pro and AMS HT—offer advanced drying and high-temperature filament support. Here’s how they stack up for each printer family:

Printer Model Compatible AMS Types Max AMS Connections Max Colors Required Accessories* Drying Power Notes
H2D / H2S / H2C AMS, AMS 2 Pro, AMS HT 4 AMS/AMS 2 Pro + 8 AMS HT 24-25 4-in-1 PTFE Adapter (≥3 units) 1 AMS 2 Pro via printer; others need adapters
P2S AMS, AMS 2 Pro, AMS HT 4 AMS/AMS 2 Pro + 4 AMS HT 20 P2S Buffer, 4-in-1 PTFE Adapter 1 AMS 2 Pro via printer; others need adapters
P1P/P1S/X1/X1C/X1E AMS, AMS 2 Pro, AMS HT 4 total (any mix) 16 Buffer (1 unit), AMS Hub (>1) Each AMS 2 Pro requires adapter
A1 Mini/A1 AMS lite, AMS, AMS 2 Pro, AMS HT 1 AMS lite OR 4 AMS/AMS 2 Pro/HT
AMS lite and AMS/AMS 2 Pro/HT mixed use NOT supported		 4 (lite) / 16 (AMS) A1 AMS Hub (AMS units) Each AMS 2 Pro requires adapter

Multi-Color Printing: How Many Colors Can You Print?

The number of colors you can print depends on the AMS configuration and printer model. Here’s a quick chart:

Printer Model Max Colors (AMS) Max Colors (AMS HT) Max Colors (AMS + AMS HT)
H2D/H2C 16 8 25 (with external spool)
H2S 16 8 24
P2S 16 4 20
X1/P1/A1 16 - 16
A1 Mini 4 (AMS lite) - -

Connecting Multiple AMS Units: Accessories and Examples

H2D/H2S/H2C Series

  • Connections: Up to 4 AMS 2 Pro + 8 AMS HT (dual-nozzle printers can dedicate one nozzle to AMS, the other to an external spool).
  • Accessories: Built-in filament buffer; 4-in-1 PTFE Adapter needed for ≥3 AMS units.
  • Example: Connect all AMS to one nozzle for up to 25 colors.
PTFE pipe connection method 6-pin cable connection method

P2S Series

  • Connections: Up to 4 AMS 2 Pro + 4 AMS HT.
  • Accessories: P2S Buffer required; 4-in-1 PTFE Adapter for ≥3 AMS units.
  • Example: Connect 2 AMS with buffer, add adapter for additional units.

X1/P1 Series

  • Connections: Up to 4 AMS (any combo of AMS, AMS 2 Pro, AMS HT).
  • Accessories: Buffer for 1 AMS; AMS Hub for multiple units.
  • Firmware: AMS 2 Pro is compatible out of the box for filament feeding.

Drying Function and Power Requirements

The advanced drying features in AMS 2 Pro and AMS HT require careful power management:

  • Single AMS 2 Pro on H2/P2S: Can be powered by the printer.
  • Multiple AMS 2 Pro: Only one can use printer power; others require a 24V 4A switching adapter.
  • AMS HT: Always requires its own AC power cord (included).
  • X1/P1/A1: Each AMS 2 Pro needs its own power adapter for drying.

Pro Tip: Using a power adapter for drying ensures full drying performance. If powered by the printer during printing, AMS 2 Pro drying is reduced to 86% capacity.

Legacy AMS Compatibility

Older AMS units are still compatible, but with some limitations:

Printer Model Max AMS Connections Buffer Required Notes
H2D 4 AMS (+8 AMS HT) Built-in PTFE Adapter for ≥3 AMS
P2S 4 AMS (+4 AMS HT) P2S Buffer PTFE Adapter for ≥3 AMS
X1/P1 4 AMS (shared limit) Buffer/AMS Hub
A1 4 AMS (any combo) A1 AMS Hub Use only A1 AMS Hub

AMS lite: A1 Series Exclusive

AMS lite is designed exclusively for the A1 series. Each A1 printer can connect to only one AMS lite. No compatibility with other printer models is planned.

End Notes and Support

We hope this guide clarifies AMS compatibility across Bambu Lab printers. For complex setups or troubleshooting, please submit a technical ticket or leave a comment below.

Frequently Asked Questions

Q: Can I mix AMS 2 Pro and AMS HT on my printer?
A: Yes, most dual-nozzle printers support mixed AMS 2 Pro and AMS HT units, up to the connection limits.

Q: What’s the best way to connect three or more AMS units?
A: Use the 4-in-1 PTFE Adapter or the appropriate hub/buffer for your printer model.

Q: Do I need special cables for drying?
A: Yes, use the new 6-pin cable included with AMS 2 Pro/HT for stable communication and drying.

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