Quick answer: For most home users printing PLA, PETG and TPU, the Bambu Lab A1 Mini is the better value. It costs a fraction of the P1S, is easy to live with, and its print quality on small and medium parts is very close. Pick the P1S only if you need a bigger build volume, plan to print ABS or ASA, or want more than four colors. If you’re spending P1S money anyway, look at the newer P2S too.
Bambu Lab made fast, reliable multicolor printing affordable, and its two most-compared machines sit at opposite ends of the range: the compact, open-frame A1 Mini and the enclosed, CoreXY P1S. This guide compares them using Bambu Lab’s published specs and documentation, plus recurring feedback from owners on Bambu’s community forum and Reddit.
Specs at a glance
| Spec | Bambu Lab A1 Mini | Bambu Lab P1S |
|---|---|---|
| Build volume | 180 × 180 × 180 mm | 256 × 256 × 256 mm |
| Design | Open frame, moving bed (bed slinger) | Fully enclosed, CoreXY |
| Max speed | 500 mm/s | 500 mm/s |
| Acceleration | 10,000 mm/s² | 20,000 mm/s² |
| Max nozzle temp | 300°C | 300°C |
| Max bed temp | 80°C | 100°C |
| Multicolor | AMS Lite, up to 4 colors | AMS, up to 16 colors with 4 units |
| Best materials | PLA, PETG, TPU | PLA, PETG, TPU, ABS, ASA, PC, PA |
| Chamber heating | None (open) | Passive only (no active heater) |
Where they really differ
1. Enclosure and materials
The P1S enclosure traps heat. That’s what makes ABS and ASA practical, because those materials warp and crack when they cool unevenly. The enclosure is passive, though: it holds the bed’s heat but doesn’t heat the chamber itself. The A1 Mini is open, so it’s built for PLA, PETG and TPU. If you never plan to print ABS or ASA, the enclosure matters much less than it seems.
2. PLA in an enclosed printer
The enclosure that helps ABS can hurt PLA. Bambu Lab’s own Wiki recommends removing the top glass cover of the P1S when printing PLA. It also advises keeping the enclosure at least 10°C below the filament’s glass transition temperature to avoid heat creep, which causes clogs. Owners on the Bambu forum regularly report clogs with the door and lid closed during long PLA prints, especially in warm rooms. Many print PLA with the door open or the top glass lifted, and some print vented lid risers. The A1 Mini avoids this entirely because it’s open.
3. Build volume
The P1S gives you 256 mm on each axis against 180 mm for the A1 Mini. That’s about 2.9 times the printable volume. For vases, helmets, large decor pieces, or several parts printed at once, it’s the most practical reason to choose the P1S.
4. Multicolor printing
The A1 Mini’s AMS Lite handles up to four colors. The P1S works with the full AMS, and chaining up to four units gives you as many as 16 colors. More colors also mean more purged filament and longer prints, though, because each color change flushes material through the nozzle. If most of your multicolor work fits within four colors, the A1 Mini covers it.
5. Noise and day-to-day upkeep
Neither printer is quiet at full speed. Owners commonly mention the P1S’s part-cooling and auxiliary fans as the main noise source, while the A1 Mini’s moving bed adds its own movement noise. In both cases it depends on settings and where the printer sits. On upkeep, P1S owners often bring up the purge chute clogging during long multicolor prints and the nozzle wiper needing occasional cleaning. These are fixable, but they’re worth knowing about before you buy.
6. Print quality
For small and medium PLA prints, owners in comparison threads generally report very similar quality from both machines, since they share Bambu’s calibration and slicer profiles. The P1S’s CoreXY design keeps the bed still, which helps with tall, thin prints. On a bed slinger like the A1 Mini, those prints can wobble as the bed moves. If you print tall decor pieces often, that favors the P1S.
Should you consider the P2S instead?
Bambu Lab launched the P2S in late 2025 as the successor to the P1S, and the P1S is still on sale alongside it. The main upgrade is adaptive airflow, which pulls in cool outside air so PLA and PETG can print with the door closed. That directly addresses the P1S’s biggest PLA complaint. It costs more, but if you’re choosing an enclosed Bambu printer, compare the two before buying. See our P2S vs P1S vs X1C comparison and A1 Combo vs P2S.
Price and value
| Printer | Bambu US store price (Oct 2026) | Value verdict |
|---|---|---|
| A1 Mini | From $219 | Best value for PLA, PETG and TPU on small to medium prints. |
| P1S | From $399 (AMS Combo $549) | Worth it for larger prints, ABS and ASA, or more than four colors. |
| P2S Combo | $749 | The newer enclosed option, with better PLA airflow. |
Prices change often, especially during Bambu’s Black Friday sale, which runs until December 1, 2026. Check the current price before you buy.
Which one should you buy?
Choose the A1 Mini if you
- Print mainly PLA, PETG or TPU
- Make small to medium parts, up to 180 mm
- Need four colors or fewer
- Want the lowest cost and the simplest setup
- Are buying your first printer
Choose the P1S if you
- Want to print ABS, ASA or other engineering materials
- Need the bigger 256 mm build volume
- Want more than four colors
- Print tall, thin models often
- Are fine opening the lid for PLA, or are considering the P2S
- 180 × 180 × 180 mm build volume
- Up to 4 colors with AMS Lite
- Open frame, best for PLA, PETG and TPU
- 256 × 256 × 256 mm build volume
- Up to 16 colors with AMS units
- Enclosed CoreXY for ABS and ASA
FAQs
Is the P1S better than the A1 Mini?
Not for everyone. The P1S is bigger, enclosed and handles ABS and ASA, but for small and medium PLA prints owners report very similar quality from the cheaper A1 Mini.
Can the P1S print PLA with the door closed?
Bambu Lab recommends removing the top glass cover for PLA, because the enclosed chamber can get warm enough to cause heat creep and clogs. Many owners also open the door during long PLA prints.
Can the A1 Mini print ABS?
It can reach ABS temperatures, but without an enclosure ABS tends to warp and crack. For regular ABS or ASA printing, an enclosed printer like the P1S or P2S is the better choice.
How many colors can each printer print?
The A1 Mini prints up to 4 colors with the AMS Lite. The P1S prints up to 16 colors with four chained AMS units.
Is the P1S discontinued?
No. As of October 2026, Bambu Lab still sells the P1S alongside its successor, the P2S.
Sources: Bambu Lab Wiki: Heat creep · Bambu forum: P1S door open with PLA · Bambu forum: A1 Mini vs P1 print quality · Bambu Lab P1 series specs · Bambu Lab A1 Mini specs
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