Bambu Lab P1S vs A1: Which Should You Buy in 2026?
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If you're choosing between Bambu's two flagship FDM printers, the call comes down to one question: do you need an enclosed chamber? The P1S is the answer if you print ABS, ASA, or any carbon-fiber-filled material — its enclosed CoreXY design holds chamber temperature and includes filtered exhaust. The A1 is the answer if you stick to PLA and PETG and want a quieter, simpler printer with full-auto bed leveling.
I run a P1S in my homelab and lean on it for the materials the A1 simply can't handle. Pricing moves around a lot with Bambu's sales, so treat these as the bands I saw when I checked in October 2026, not fixed numbers: the P1S carries a $699 list price but has sold at $349 to $399 for most of the year, and the P1S Combo (printer plus AMS) has run $499 to $549 on sale. The A1 sits around $299 to $399 standalone, and the A1 Combo with AMS Lite has sold in the low-to-mid $400s. That puts an A1 Combo and a standalone P1S within about $50 of each other, and that is the interesting comparison: enclosed-chamber capability vs. multi-color out of the box.
Note on the bundles. The P1S Combo pairs the printer with the 4-spool AMS for true multi-color printing on day one. The A1 Combo does the same with the AMS Lite. Those two links go to Bambu's store for today's price; the Amazon links in this guide are affiliate links.
Quick Comparison
| Feature | Bambu Lab P1S | Bambu Lab A1 |
|---|---|---|
| Price (standalone, Oct 2026) | $349 to $399 on sale ($699 list) | $299 to $399 |
| Price (combo with AMS) | P1S Combo, $499 to $549 on sale | A1 Combo with AMS Lite, low-to-mid $400s on sale |
| Frame | Enclosed CoreXY | Open bed-slinger |
| AMS | AMS-compatible (4-spool, sold separately) | AMS Lite-compatible (4-spool, sold separately) |
| Materials | PLA, PETG, TPU, ABS, ASA, PC, PA, carbon-fiber blends | PLA, PETG, TPU, PVA |
| Best For | Engineering-grade prints | Quiet, easy PLA printing |
Bambu Lab P1S
The Bambu Lab P1S also features active chamber control, ensuring that the internal temperature remains stable throughout the printing process. This is crucial when working with materials like ABS and ASA, as they require precise temperature control to avoid warping or other issues. Additionally, the filtered exhaust system helps keep your workspace clean by removing harmful fumes.
One downside of the Bambu Lab P1S is its larger footprint compared to the A1, which may be a concern if you have limited space for your printer. Unlike the cheaper P1P, the P1S ships with the auxiliary part-cooling fan, the chamber regulator fan, and the activated-carbon filter already installed, so there is no fan kit to add. The real trade-off is noise and heat: the enclosure and extra fans make it louder than the A1, and PLA with the door closed can need the lid cracked in a warm room.
Get this if you're looking for a robust 3D printer capable of handling a wide range of materials and requiring precise temperature control. Skip this if space is tight, or you only ever print PLA and PETG and want the quieter machine.
Bambu Lab A1
One of the standout features of the A1 is its quiet operation. Most prints stay under 50 dB, which means you can print in your home without disturbing others or yourself. This makes it ideal for those who need to work or sleep while their printer runs. The bed-slinger design also ensures that the bed leveling process is fully automated, eliminating the need for manual adjustments and saving time.
The AMS Lite compatibility adds another layer of versatility by allowing you to print with four different colors in a single session. This can be particularly useful if you're looking to create multi-colored prints or test out various color combinations without having to switch filaments manually.
However, there are some drawbacks to consider. The open-frame design means that the A1 is not suitable for printing materials like ABS or ASA, which require an enclosed environment to prevent warping and ensure consistent results. TPU prints fine from the spool holder, but Bambu does not support running it through the AMS Lite, so flexible filament means single-color prints.
Get this if you need a quiet printer with full-auto bed leveling and want to experiment with multi-color prints. Skip this if you frequently print materials like ABS or ASA that require an enclosed environment.
The Verdict
For most buyers, the P1S is the safer pick — it's roughly $50 to $100 more than the A1 standalone at sale prices, but that buys you an enclosed chamber that opens up engineering-grade materials (ABS, ASA, carbon-fiber blends), full AMS support for true 4-color prints when you add it later, and active chamber temperature control. If you'll only ever print decorative PLA, the A1 is genuinely good — quieter, simpler, full-auto bed leveling out of the box. But the moment you want to print a part for your car or a structural enclosure, the A1 hits a wall the P1S doesn't. And at roughly the same money, the A1 Combo gets you 4-color PLA today, while a standalone P1S keeps the option open to add the AMS later when you want it.
Who Should Buy the Bambu Lab P1S
Pick the P1S if you print engineering materials (ABS, ASA, ASA-CF, PA), want full multi-material capability, or care about chamber temperature stability and filtered exhaust.
Who Should Buy the Bambu Lab A1
Pick the A1 (or the A1 Combo with AMS Lite) if you mostly print PLA or PETG, value quiet operation and full-auto bed leveling, and don't care about printing in an enclosed chamber. At around $299 on sale, the A1 is also the cheapest way into the Bambu ecosystem if you want to start small and add the AMS Lite later.
Frequently Asked Questions
Can the Bambu Lab P1S print with TPU?
Yes. The P1S handles TPU from the external spool holder; Bambu's guidance is to keep flexible filament out of the AMS, where the long filament path and feed gears cause jams. The auxiliary part-cooling fan that helps with TPU overhangs is already installed on the P1S, so there is nothing extra to buy.
Is the Bambu Lab A1 suitable for printing ABS?
No, the Bambu Lab A1 is not suitable for printing ABS. Its open frame design makes it challenging to maintain the consistent temperature required for ABS and ASA prints. The A1 is limited to PLA and similar materials that don't require a heated enclosure or precise temperature control. If you need to print with ABS, consider upgrading to a printer like the Bambu Lab P1S, which has an enclosed build chamber.
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Test Picked Editorial
Edited by Adam Ryan. Gear picks come from equipment running in his own homelab and workshop. Software picks are researched comparisons.
