Buy the P2S if you want to print fiber-filled filament as shipped, run ABS or PC on a hotter bed, or add AMS 2 Pro drying without extra power adapters. It keeps the P1S’s 256 mm build cube and adds a hardened-steel toolhead, a 110 °C bed, a 5-inch touchscreen, a 1080p 30 fps camera and a stronger extruder. Buy the P1S if you print standard filaments (PLA, PETG, TPU, ABS, ASA) and want the lower-priced machine. Bambu still sells it and says it has no plans to stop.

Every figure here comes from Bambu Lab’s spec sheets, its US store pages and the Bambu Lab Wiki, checked October 5, 2026. Bambu notes that P2S performance figures come from its own internal testing.

The two printers on Bambu’s spec sheets

Spec Bambu Lab P2S Bambu Lab P1S
Build volume 256 × 256 × 256 mm 256 × 256 × 256 mm
Max toolhead speed 600 mm/s 500 mm/s
Max acceleration 20,000 mm/s² 20 m/s² (the same figure)
Max hotend flow (Bambu’s test) 40 mm³/s, ABS at 280 °C 32 mm³/s, ABS at 280 °C
Max nozzle / bed temperature 300 °C / 110 °C 300 °C / 100 °C
Nozzle and extruder gears Hardened steel Stainless steel nozzle, steel gears
Fiber-filled filament Listed (PLA-CF, PETG-CF, PA6-CF and others) Not recommended as shipped
Screen 5-inch 854 × 480 touchscreen 2.7-inch 192 × 64 screen with buttons
Chamber camera 1920 × 1080, 30 fps 1280 × 720, 0.5 fps
Storage 8 GB eMMC and USB port microSD card
Max AMS units 4 AMS 2 Pro plus 4 AMS HT (20 slots) 4 units in total
Size and weight 392 × 406 × 478 mm, 14.9 kg 389 × 389 × 458 mm, 12.95 kg
Max power at 110 V 1,000 W 350 W

Bambu measures hotend flow on different test models for the two printers (a 250 mm round model for the P2S, a 150 × 150 mm model for the P1S, both single-wall ABS at 280 °C), so treat the flow figures as each spec sheet’s own claim rather than a matched test.

What actually changes

Abrasive filament without an upgrade

This is the biggest practical difference. The P1S spec sheet rates carbon- and glass-fiber filament as “Not Recommended,” and Bambu’s P1S upgrade guide says its stainless steel hotend and extruder wear quickly with abrasive filament, recommending a hardened steel hotend and extruder upgrade. The P2S ships with a hardened steel nozzle and hardened steel extruder gear, and its spec sheet lists PLA-CF, PETG-CF, ABS-GF, ASA-CF, PA6-CF, PA6-GF, PAHT-CF, PPA-CF and PET-CF.

If you plan to print fiber-filled filament on a P1S, price in that upgrade. Our Bambu Lab hotend guide covers the hardened steel options.

Hotter bed, but still no heated chamber

The P2S bed reaches 110 °C against the P1S’s 100 °C. Bambu’s P2S guide gives 100–110 °C as the bed setting for ABS and PC, so the extra 10 °C matters most for those materials.

Neither printer actively heats its chamber. Bambu says the P2S instead closes an airflow flap and recirculates chamber air through its carbon filter, and it markets the P2S as “50°C chamber ready.” For PLA, the P2S switches to drawing cool outside air into the chamber, which Bambu says lets you print low-temperature filament with the door closed. The P2S has no exhaust fan; Bambu says this makes it quieter than the P1S’s exhaust-fan design and that its air filter is larger than the P1 series filter. Those are Bambu’s claims, not measurements.

A stronger extruder and faster spec

Bambu lists a 600 mm/s top toolhead speed for the P2S against 500 mm/s for the P1S, at the same 20,000 mm/s² acceleration. Its new servo extruder delivers up to 8.5 kg of extrusion force, which Bambu says is 70% more than its predecessor, and it samples resistance to detect filament grinding and clogs. The P2S also calibrates flow with an eddy current sensor and uses a one-clip quick-swap hotend, so nozzle changes need no wiring disconnection.

Bambu says the P2S works with H2D nozzles but not A1 nozzles.

Screen, camera and error detection

The P1S has a small 2.7-inch screen and buttons. The P2S has a 5-inch touchscreen. The P2S camera records 1920 × 1080 at 30 fps, where the P1S chamber camera records 1280 × 720 at 0.5 fps. If remote monitoring matters, that is a large change; our P1S camera comparison covers the P1S camera’s limits. Bambu also lists AI error detection on the P2S for spaghetti, nozzle clumping and purge chute jams, run on a 2 TOPS neural processor.

Multicolor and drying

Both printers work with Bambu’s AMS systems, but the P2S supports more units and makes drying simpler.

  • Capacity. The P2S supports up to 4 AMS 2 Pro and 4 AMS HT units at once, 8 units with 20 slots. The X1/P1 series supports 4 units in total.
  • Drying power. With a P2S, one AMS 2 Pro can draw power from the printer for drying. With a P1S, every AMS 2 Pro needs its own AMS 2 Pro Switching Adapter to dry filament. Drying power drops while the printer is printing or loading filament, and Bambu recommends an external adapter for better results.
  • Buffer. The P2S Combo includes the AMS 2 Pro and a filament buffer. A standalone P2S paired with a standalone AMS needs a separate P2S filament buffer. For the X1/P1 series, Bambu’s connection guide lists a filament buffer, PTFE tube coupler and 4-pin cable as separate purchases when you connect one AMS.

On Amazon, the P1S Combo pairs the P1S with the first-generation AMS. Bambu’s own store also sells a P1S AMS 2 Pro Combo (search Amazon for the Bambu Lab P1S AMS 2 Pro Combo ) and recommends it over the AMS Combo for its active filament drying. Our AMS 2 Pro review explains the drying unit itself, or you can search Amazon for the Bambu Lab AMS 2 Pro on its own.

Power, size and maintenance

The P2S sheet lists 1,000 W maximum at 110 V, noting the printer runs at full power for about 3 to 5 minutes while the bed heats, and 200 W steady-state when printing PLA. The P1S sheet lists 350 W maximum at 110 V. Check the circuit if several printers share it.

The P2S body is 3 mm wider, 17 mm deeper, 20 mm taller and 1.95 kg heavier. Bambu replaced the P1’s carbon rods with smooth hollow steel rods on the X-axis, saying they are easier to clean. Older Bambu build plates fit the P2S, but they don’t support its plate-type recognition.

Which should you buy?

Choose the P2S if any of these apply:

  • you will print carbon- or glass-fiber filament and don’t want to upgrade the toolhead
  • you print ABS or PC and want the 110 °C bed
  • you plan to use an AMS 2 Pro and want drying without buying a power adapter for the first unit
  • remote monitoring matters and a 0.5 fps camera would frustrate you

Choose the P1S if you print PLA, PETG, TPU, ABS and ASA (all rated “Ideal” on its spec sheet), the 256 mm cube is enough, and the lower price matters more than the touchscreen and camera. It remains on sale at Bambu’s US store, and Bambu’s P2S FAQ says there are no current plans to stop selling it. Our P1S review covers it in more depth, and P1S vs P1P covers the open-frame alternative.

FAQ

Is the Bambu Lab P1S discontinued?

No. Bambu’s US store still sells the P1S, and its P2S FAQ says there are no plans to stop selling the P1S at the moment.

Is the P2S bigger than the P1S?

The build volume is the same, 256 x 256 x 256 mm. The P2S body is slightly larger, at 392 x 406 x 478 mm against 389 x 389 x 458 mm, and heavier, at 14.9 kg against 12.95 kg.

Can the P1S print carbon-fiber filament?

Not as shipped. Bambu rates carbon- and glass-fiber filament as not recommended on the stock P1S and says its stainless steel hotend and extruder wear quickly with abrasive filament. A hardened steel hotend and extruder upgrade is the fix. The P2S ships with a hardened steel nozzle and extruder gear.

Does the P2S have a heated chamber?

No. Bambu says the P2S has no active chamber heating. It keeps heat in by closing its airflow flap and recirculating chamber air through the carbon filter.

Sources