Bambu Lab AMS 2026: AMS 2 Pro vs AMS HT vs AMS lite, Real Prices and Which One Fits Your Printer

“AMS” now means four different products. Bambu Lab’s Automatic Material System started as one four-spool box for the X1 Carbon. In 2026 Bambu sells the AMS 2 Pro, the single-spool AMS HT, the open-frame AMS lite for its bed-slinger printers, and the original AMS, each with its own compatibility rules, power requirements and hidden accessory costs. We pulled current pricing for every unit and connection part from Bambu Lab’s US store on October 31, 2026, and checked the limits against Bambu’s own spec sheets and its multi-AMS connection guide.

Bambu Lab AMS by the numbers

• $229 vs $199 is the price of the AMS 2 Pro versus the original AMS on Bambu’s US store on October 31, 2026. The $30 difference buys a 65 °C dryer, sealed storage and a live humidity readout.
• 65 °C vs 85 °C are the maximum drying temperatures of the AMS 2 Pro and the AMS HT, per Bambu’s spec sheets. Bambu’s AMS 2 Pro sheet flags ABS, ASA, PET, PA, PC, PVA, BVOH, POM, HIPS and its own carbon-fiber filaments as needing more heat than the AMS 2 Pro can deliver.
• 25 colors is the most any Bambu printer can address: an H2D, H2C or X2D with four AMS 2 Pro units (16 slots), eight AMS HT units (8 slots) and one external spool, per Bambu’s connection guide. The single-nozzle H2S tops out at 24, the P2S at 20 slots and the X1/P1 at 16.
• $32.99 per unit is the hidden cost of drying on older printers. Bambu says A1, P1 and X1 printers can’t power the AMS 2 Pro’s heater, so every AMS 2 Pro you want to dry with needs its own Switching Adapter. H2, P2S and X2D printers power one unit; each additional unit needs an adapter.
• 150 W is the AMS HT’s average power draw per its spec sheet, which is why it always runs from its own AC cord rather than the printer.
• 50–68 mm wide and 197–202 mm across is the spool window for the AMS 2 Pro and AMS HT. A spool outside it won’t seat properly, whatever brand it is.

The four AMS units compared

Bambu describes the AMS 2 Pro and AMS HT as compatible with all of its printers, but “compatible” comes with an accessory list that differs per model. That’s where most buyers get caught out.

Which AMS works with your printer

Sources: Bambu Lab’s “Connection Guide for Multiple AMS Units with Different Printer Models” and its AMS 2 Pro / AMS HT FAQ on wiki.bambulab.com, plus product pages on us.store.bambulab.com, all checked October 31, 2026. The AMS lite product page states that it “is not compatible with X, P and H2 series printers.”

Two details in that table contradict a lot of older advice online. First, the A1 is no longer stuck at four colors. Since firmware 01.07.00.00, Bambu’s guide says an A1 or A1 mini can run up to four full AMS units through the $19.99 A1-series hub, in any mix of AMS, AMS 2 Pro and AMS HT. It just can’t combine them with the AMS lite. Second, the X2D uses the same AMS 2 Pro and AMS HT system as the H2 printers, with the same 25-color ceiling.

Combo now or AMS later? The math

If you’re buying a printer anyway, the Combo is the cheapest way to get an AMS. The table below compares Bambu’s October 31, 2026 store prices for the solo printer and the Combo with what the same AMS would cost you added later.

The P1S row needs a footnote. Bambu’s wiki says a non-Combo X1 or P1 needs a filament buffer or hub, a PTFE tube coupler, a 4-pin cable and a power adapter before an AMS 2 Pro can feed and dry. Bambu sells those as the AMS 2 Pro Upgrade Kit (AMS Hub, 4-pin cable, Switching Adapter, three couplers and PTFE tubes), $66.47 on sale against a $94.95 list price. That kit is why adding an AMS 2 Pro to a solo P1S costs $135 more than buying the Combo.

On the H2S and H2D the gap shrinks to $29 because the buffer is built into the printer. If you aren’t sure you want multi-color on an H2, buying the solo printer and adding an AMS 2 Pro later costs very little extra. Prices on Bambu’s store move often, so recheck before you order. Bambu’s US store also offers 30-day price protection: if its own price drops within 30 days, it credits the difference.

The drying question: 65 °C vs 85 °C

The AMS 2 Pro’s dryer is the main reason to pick it over the original AMS, but it has a ceiling. Bambu’s spec sheet puts an asterisk on most engineering materials and says: “Filaments marked with * require higher drying temperature. The AMS 2 Pro cannot dry them completely. If you want better drying performance for these filaments, we recommend purchasing an AMS HT.”

Source: Bambu Lab AMS 2 Pro and AMS HT spec sheets (store.bblcdn.com), October 31, 2026.

Four practical limits apply to both drying units, all from Bambu’s own documentation:

• No standalone drying. The unit has to be connected to a powered-on printer by the 6-pin cable. If you want to dry spools on a shelf, a standalone box from our best filament dryer guide still does that better.
• Drying while printing depends on the printer. Bambu’s FAQ lists minimum firmware for simultaneous drying and printing on the H2D, H2S, P2S, X2D and A2L and says other printers “will receive the feature in future updates.” On an A1, P1 or X1, plan on drying a unit only when it isn’t feeding the current print.
• Printer power is shared. When an H2 printer powers an AMS 2 Pro’s dryer while printing, Bambu says drying power is cut to prioritize the print. A P2S powering the dryer can’t heat or move until you add the $32.99 Switching Adapter.
• Separate your materials. Bambu’s drying guide warns that low-temperature spools deform when you dry a hotter material beside them. Take the PLA out before drying ABS.

What independent testing shows

Bambu’s spec sheets give ratings, not results, so we looked for outside measurements.

• The AMS 2 Pro dries well but runs below its rating. In MyTechFun’s dryer test (Dr. Igor Gaspar, video published July 9, 2026), a sponge holding 2 mL of water lost 52% of it after 30 minutes and 99% after one hour in the AMS 2 Pro. The highest temperature MyTechFun measured was 59 °C, against Bambu’s 65 °C rating, and the unit ran at 38 dB at 50 cm. In the same test a Sunlu FilaDryer S4 removed all of the water within 30 minutes at 67 °C, so a dedicated dryer is still faster.
• Reviewers rate the system highly. Tom’s Hardware gave the H2D, tested with the AMS 2 Pro and AMS HT, 5 out of 5 in March 2025, and CNC Kitchen called the AMS 2 Pro’s automatic vents the first implementation that gets moisture venting right.
• The AMS HT may not hold 85 °C either. We found no independent lab numbers for it. On Bambu’s own forum, owners report filament reaching about 70 °C with the unit set to 85 °C (July 2025). Treat those as user reports, not measurements.
• The AMS lite needs a solid surface. In its June 2026 A2L review, Tom’s Hardware reported the AMS lite “vibrated right onto the floor after 45 minutes” on an IKEA Lack table.
• Cardboard spools are still awkward. Fauxhammer’s H2D review, updated September 2026, says cardboard-spool handling is “still not fixed in any meaningful way,” which matches Bambu’s own advice to fit an adapter ring.

Prices have also fallen a long way. The AMS lite launched at $249 in September 2023, per Igor’s Lab, and costs $159 now. Tom’s Hardware’s multicolor printer guide still listed the AMS 2 Pro at $359 in June 2026; Bambu’s US store had it at $229 on October 31.

Hidden costs to budget for

The AMS itself is rarely the whole bill. Current Bambu US store prices for the connection parts:

• AMS 2 Pro Switching Adapter: $32.99 each, needed to dry on A1, P1 and X1, and for every AMS 2 Pro beyond the first on H2, P2S and X2D.
• Filament Buffer: $24.99 (X1/P1), $30.99 (P2S), $29.99 (X2D), $24.99 (H2S replacement). The H2D/H2C buffer showed sold out on October 31.
• AMS Hub: $48.99 for two or more units on X1/P1; AMS Hub for the A1 series: $19.99.
• 4-in-1 PTFE Adapter: $4.99, or $7.99 for the H2-series version that the H2C requires.
• AMS 2 Pro Upgrade Kit: $66.47 on sale ($94.95 list) for non-Combo X1 and P1 printers.

Bambu also warns against two shortcuts. Don’t use the buffer or hub that ships with a full AMS to connect an A1, which Bambu says can damage it and won’t be covered under warranty. And use the new 6-pin cable that comes with the AMS 2 Pro and AMS HT, because the first-generation AMS cable “may cause unstable communication.”

What the AMS won’t do

• It doesn’t reduce purge waste. Every color change on a single-nozzle printer still flushes filament into a purge chute or prime tower. Only a second nozzle (H2D, X2D) or a toolchanger cuts that. Our best multi-color 3D printer guide compares the approaches.
• It doesn’t feed generic TPU. Use Bambu’s TPU for AMS, or the AMS HT’s bypass outlet with manual loading. See our TPU filament guide for what else is out there.
• It doesn’t need Bambu filament. RFID auto-setup only works with Bambu spools, but third-party PLA and PETG just need their profile set once. Our Bambu Lab filament guide covers when Bambu’s own spools are worth it.
• It doesn’t make an open-frame printer an ABS machine. An AMS HT can dry ABS and nylon perfectly well, but the A1 and A2L beds and open frames still limit you to PLA, PETG and TPU in practice.

The AMS units we’d buy

1. AMS 2 Pro: the default for almost everyone

The AMS 2 Pro is the AMS to buy unless you have a specific reason not to. At $229 it costs $30 more than the original AMS and adds a dryer that handles the two materials most people print, PLA and PETG. On an H2, P2S or X2D the printer powers one unit’s dryer for free. On older printers, add the adapter cost before you compare prices.

2. AMS HT: the add-on for engineering filament

Think of the AMS HT as a heated spool holder that can also feed the printer. It earns its place next to an H2D, X2D or P1S printing nylon, PC or carbon-fiber parts, where Bambu’s own spec sheet says the AMS 2 Pro falls short. For PLA-only printing it’s the wrong purchase. Our best nylon filament guide covers the material side.

3. AMS lite: four colors on an A-series printer

On an A1 or A1 mini, the AMS lite in a Combo is still the cheapest way into four-color printing. Buy it separately only if you already own the printer and print PLA in a dry room. If you want drying or more than four colors on an A1, Bambu’s A1 hub route to the AMS 2 Pro is now an option. Our Bambu Lab A1 review covers the printer side.

4. AMS (1st gen): only as a bargain

At a $30 gap, a new original AMS makes little sense. It’s worth considering used, or as a second unit dedicated to PLA when the first is an AMS 2 Pro handling drying duty.

Who should buy which AMS

• New A1 or A1 mini buyer: get the Combo with the AMS lite. It adds $100.
• A1 owner who wants drying or more colors: an AMS 2 Pro through the $19.99 A1 hub, plus a $32.99 adapter if you want to dry.
• P1S owner without an AMS: AMS 2 Pro plus the $66.47 Upgrade Kit, or check whether a P1S AMS 2 Pro Combo is cheaper overall if you’re replacing the printer anyway.
• P2S, X2D, H2S or H2D buyer: buy the Combo; the printer powers one AMS 2 Pro’s dryer by itself.
• Printing nylon, PC or carbon-fiber parts: add one AMS HT per engineering spool you run regularly.

Bottom line

Buy the AMS 2 Pro unless you’re on an A1-series printer and want the cheapest path to four colors, in which case the AMS lite inside a Combo is the better deal. Add an AMS HT only for engineering filament, because Bambu’s own spec sheet says that’s where the AMS 2 Pro’s 65 °C dryer stops being enough. Skip a new original AMS: at $30 less than an AMS 2 Pro it saves almost nothing. And before you add any AMS to a printer you already own, price the buffer, hub and Switching Adapter your model needs, because those parts can add $25 to $66 to the bill.

Related guides

• Best multi-color 3D printer: AMS versus Creality CFS, Anycubic ACE Pro and built-in systems.
• Bambu Lab filament: real prices for the spools that auto-load in the AMS.
• Best filament dryer: standalone dryers that work without the printer.
• Bambu Lab A1 review: the printer most AMS lite buyers start with.
• Bambu Lab P2S review and P1S review: the enclosed printers most AMS 2 Pro buyers pair it with.
• Bambu Lab H2D review and X2D review: the dual-nozzle machines that reach 25 colors.