Bambu Lab P1S vs P1S Combo: Is the AMS Worth $200 More?

The Bambu Lab P1S and P1S Combo are the same printer. Same CoreXY motion system, same 500mm/s speed, same enclosed chamber, same auto-leveling, same software. The only difference is that the P1S Combo bundles the AMS (Automatic Material System) for $200 more. This makes the buying decision unusually simple: is automatic multi-color printing worth $200? Based on specs and print community data, the answer depends entirely on what you plan to print — and whether you can buy the AMS separately later.

Specs Comparison

What the AMS Actually Does

The AMS (Automatic Material System) is a 4-spool housing unit that sits on top of the P1S. It feeds filament to the printer automatically, enabling two key capabilities:

Multi-color printing. The AMS swaps filaments during a print to produce objects with up to 4 colors from a single AMS unit. With multiple AMS units chained together (up to 4), you can use up to 16 colors in a single print. Based on print community data, multi-color prints are a major draw — signs, logos, decorative models, lithophanes, and artistic projects look dramatically better with multiple colors compared to single-color prints painted after the fact.

Multi-material printing. Beyond color, the AMS enables printing with different material types in one object. You can combine PLA for the body with TPU for flexible sections, or use water-soluble PVA support material for complex geometries. This is an engineering capability, not just a cosmetic one.

The AMS also provides practical quality-of-life benefits: automatic filament runout detection and spool switching, humidity-controlled spool storage (the sealed unit helps keep filament dry), and RFID recognition for Bambu-branded filaments that automatically loads print profiles.

What the AMS Costs You

The $200 premium is the entry price, but multi-color printing has additional ongoing costs. Every color change requires a purge — the printer extrudes a block of transition filament to clear the previous color from the nozzle. Based on print community data, purge waste typically amounts to 5-15% of total filament used per multi-color print. On complex multi-color models with frequent color changes, waste can be higher.

You also need to own multiple spools of filament in different colors, which increases your upfront material investment. A basic 4-color setup requires 4 spools ($80-100 total for PLA).

The AMS unit adds about 10-15 minutes of filament-swap time per print compared to single-color printing. Each color change involves retracting the current filament, loading the next, purging, and resuming. On prints with dozens of color changes, this adds meaningful time.

When Multi-Color Is Worth It

Based on print community data, the users who get the most value from the AMS fall into clear categories:

Decorative and artistic printing. If you regularly print models with logos, text, patterns, or multi-tone designs, the AMS transforms what is possible. A two-color nameplate that would require masking and painting becomes a single automated print. Multi-color lithophanes and artistic models are a significant step up from single-color versions.

Gifts and products. Users who print customized gifts, small-batch products, or items for sale benefit from the professional look of integrated multi-color printing. Based on owner data, the AMS is cited as the feature that made 3D printing “gift-worthy” for many users.

PVA soluble supports. For engineering users, the ability to print water-soluble support material alongside the main body enables complex geometries that are difficult or impossible to achieve with breakaway supports. Overhangs, internal channels, and interlocking parts become feasible.

When Multi-Color Is Not Worth It

Functional parts. If you primarily print brackets, enclosures, jigs, fixtures, and mechanical parts, color is irrelevant. A single-color P1S at $699 does the same job for $200 less.

Single-material users. If you print almost exclusively in one PLA color, the AMS sits unused. The filament dry-storage benefit is nice but does not justify $200.

Speed-focused workflows. If you prioritize fast turnaround over aesthetics, the added time per color change slows your workflow. Single-color prints are faster by definition.

Can You Add the AMS Later?

Yes. The AMS is a standalone accessory that connects to the P1S at any time. Buying the P1S now and adding the AMS later is a viable strategy. However, purchasing the AMS separately typically costs $250-300, making the Combo’s bundled $200 price a $50-100 savings. Based on print community data, the Combo bundle is the better deal if you know you will want multi-color eventually.

If you are uncertain about multi-color, buying the base P1S and evaluating your needs before committing to the AMS is a reasonable approach — even if it costs slightly more later.

Choose the Bambu Lab P1S If:

• You primarily print functional parts where color does not matter
• You want to save $200 upfront and add the AMS later if needed
• You print mostly in a single material and color
• Budget is a primary concern and $699 is meaningfully easier than $899
• You are uncertain about whether multi-color will be useful for your projects

Choose the Bambu Lab P1S Combo If:

• You want multi-color printing for decorative models, signs, logos, or gifts
• You plan to use PVA soluble supports for complex geometries
• You want the best bundle price on the AMS ($200 vs $250-300 standalone)
• You print for sale, as gifts, or for display where aesthetics matter
• You want the humidity-controlled spool storage and automatic filament switching from day one

Verdict

The Bambu Lab P1S Combo is the better value for most users who have any interest in multi-color printing. The $200 AMS bundle price is the cheapest way to get automatic multi-color capability, and based on print community data, the vast majority of users who try multi-color printing continue using it regularly. The AMS transforms what the P1S can produce — turning it from an excellent engineering tool into an excellent engineering tool that also produces visually stunning prints.

The Bambu Lab P1S at $699 is the right choice for users who are purely focused on functional printing. If every print you make is a bracket, enclosure, or prototype where color is irrelevant, saving $200 is the practical decision. The P1S without the AMS is still one of the best 3D printers available — the same CoreXY speed, enclosed chamber, and Bambu software that makes the platform exceptional.

For undecided buyers, the Combo is the safer purchase. You can always not use the AMS, but buying it later costs more. Based on print community data, the most common regret is wishing they had bought the Combo upfront.

Bambu Lab P1S Combo

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Bambu Lab P1S

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FAQ

Can the P1S print multiple colors without the AMS? Only through manual filament swaps. You can pause the print at specific layer heights, swap filament, and resume. This works for simple two-tone prints but is impractical for complex multi-color designs with frequent changes within the same layer.

How much filament does the AMS waste on color changes? Each color change requires a purge block to clear the previous color. Based on print community data, purge waste ranges from 5-15% of total filament on a typical multi-color print. Bambu Studio allows some optimization of purge volume, and printing purge blocks as infill for other parts can reduce waste.

Does the AMS work with all filament brands? Yes. The AMS works with any 1.75mm filament, including third-party brands. Bambu-branded filaments include RFID tags that auto-load print profiles, but third-party filaments work fine with manual profile selection. Based on owner data, some flexible filaments (TPU) and very soft materials may have higher jam rates in the AMS feed tubes.

Is the AMS loud? The AMS adds mechanical noise during filament changes — the rewinding and feeding process is audible. During normal printing between color changes, it adds no noise. Based on owner data, the noise is brief and not significantly louder than the printer itself.

Can I use the AMS just for filament switching, not multi-color? Yes. A practical use case is loading 4 spools of the same color and letting the AMS automatically switch to a fresh spool when one runs out mid-print. This enables extremely long unattended prints without filament runout failures. Based on print community data, this is a popular use case for farm operators and overnight printing.

P1S Combo or X1 Carbon — which is better? The X1 Carbon ($1,449) adds a hardened steel nozzle, a built-in AI camera with lidar-assisted bed leveling, and higher build quality over the P1S Combo ($899). If you print abrasive filaments or want the absolute best Bambu has to offer, the X1 Carbon justifies its premium. For most users printing PLA, PETG, and standard materials, the P1S Combo delivers 90% of the X1 Carbon experience at 62% of the cost.