Bambu P1S vs X1 Carbon: Which Should You Buy?

The Bambu P1S and X1 Carbon are the two enclosed, high-performance options in Bambu Lab’s current lineup. They share the same CoreXY motion system and print quality fundamentals. The question is whether the X1C’s additional features justify the ~$200-300 price gap.

I’ve printed on both machines. Here’s the honest comparison.

Spec Comparison

Feature	P1S	X1 Carbon
Motion system	CoreXY, 20000mm/s²	CoreXY, 20000mm/s²
Max print speed	500mm/s (rated)	500mm/s (rated)
Build volume	256×256×256mm	256×256×256mm
Enclosure	Yes (sealed)	Yes (sealed)
Heated chamber	Aux cooling fan only	Aux fan + active heating option
Micro Lidar	No	Yes
Camera	Yes (basic)	Yes (AI spaghetti detection)
First-layer calibration	Vibration-based	Micro Lidar
AMS compatible	Yes	Yes
Price (body only)	~$699	~$1,199

What’s the Same

The P1S and X1C share:

• The same CoreXY structure and motion quality
• Compatible AMS system
• Bambu Studio slicer (identical features for both)
• Hardened steel nozzle compatibility
• PEI plate options
• Over-the-air firmware updates

In practice, print quality at the same settings is essentially identical for PLA, PETG, and ABS. I ran a side-by-side test printing the same calibration model on both machines at 200mm/s — measured dimensions and surface quality were within my measurement error.

The Real Differences

Micro Lidar vs. Vibration Calibration

The X1 Carbon uses a Micro Lidar sensor to map the build plate and compensate for surface variation. The P1S uses vibration-based calibration (resonance frequency measurement to set vibration compensation, but no Lidar for first-layer height).

Practical impact: In my experience, both machines produce excellent first layers in normal conditions. The Lidar becomes more valuable when you’re printing on surfaces that vary in height across the bed, or when you switch between different plate types frequently. For most users printing on the same surface consistently, the P1S’s calibration is sufficient.

AI Camera vs. Basic Camera

The X1C has a higher-resolution camera with Bambu’s AI failure detection. The P1S has a basic camera for manual remote monitoring but no AI detection.

Practical impact: The AI detection catches obvious spaghetti failures after a delay (not immediately — this is a genuine limitation even on the X1C). Manual monitoring via the P1S camera works, but it requires you to actually check. If you’re running overnight prints unattended, the X1C’s detection provides some additional peace of mind, but it’s not foolproof.

Heated Chamber

The X1C supports an active heated chamber via its auxiliary cooling fan. The P1S has the enclosure but no active heating.

Practical impact: For ABS and ASA printing, the P1S’s passive enclosure temperature (~35-40°C in my testing) is sufficient for most print sizes. The X1C’s heated chamber becomes relevant for high-temperature engineering materials (PC, nylon PA) where you want chamber temperatures above 40°C. If you’re not regularly printing engineering materials, this doesn’t matter.

Who Should Get the P1S

The P1S is the right choice if:

• Your materials are primarily PLA, PETG, ABS, ASA — the P1S handles all of these excellently
• Budget is a real factor — the ~$500 savings vs. X1C buys a lot of filament
• You don’t need AI failure detection
• You’re happy to manually verify overnight prints occasionally

The P1S represents excellent value. For 80%+ of use cases, it’s the more rational purchase.

Who Should Get the X1 Carbon

The X1C makes sense if:

• You’re regularly printing engineering materials (PA, PC) and want active chamber heating
• Unattended printing is frequent and you want the AI detection layer
• You print across multiple different plate surfaces and want Lidar-assisted calibration
• The $500 price difference is not a meaningful constraint

My Recommendation

Start with the P1S unless you have a specific reason to pay for X1C features. The print quality is identical for common materials, and the AMS works the same way on both. The money saved goes toward the AMS itself (if you don’t have one yet), filament, or upgrades.

Upgrade to the X1C if after several months you find yourself limited by P1S features — particularly heated chamber for engineering materials. But for most makers printing PLA and PETG daily, the P1S is the better value proposition.

For context on where both machines sit in the broader landscape, FDMDesk’s buyer guide covers all price tiers ↗ including alternatives outside the Bambu ecosystem.