Main trade-off
Bambu Lab P1S Combo
The bed limits wider flat models.
Head-to-head
Bambu Lab P1S Combo vs QIDI Plus4: P1S includes color feeding, Plus4 needs an extra QIDI Box
The short answer
Choose P1S Combo when four-color prints are part of the first project and its 256 mm nominal bed is enough. Choose Plus4 when the part needs a larger footprint or the material profile needs its actively heated chamber and higher nozzle ceiling. The selected P1S includes AMS. The selected Plus4 needs an additional QIDI Box for automatic colors.
Before you choose
The reasoning and the trade-offs
A 280 mm square fixture needs the wider bed
Plus4 has a nominal 305 mm square bed. A flat 280 mm square fixture exceeds both P1S horizontal axes.
What this is based on
280 mm is 24 mm beyond each P1S nominal horizontal limit and 25 mm inside the Plus4 limit.
Main trade-off
QIDI Plus4
The selected package omits QIDI Box.
Bambu Lab P1S Combo
- Choose it for
- Start with four automatic colors from the supplied AMS
- Use an enclosed printer for compatible parts within the bed
- Main trade-off
- The bed limits wider flat models.
QIDI Plus4
- Choose it for
- Fit a wider one-piece model
- Use a documented 65 C active chamber
- Main trade-off
- The selected package omits QIDI Box.
About this comparison
Compare P1S Combo and Plus4 for four-color work, a 280 mm flat part and filament profiles that require active chamber heating.
Choose P1S Combo when four-color prints are part of the first project and its 256 mm nominal bed is enough. Choose Plus4 when the part needs a larger footprint or the material profile needs its actively heated chamber and higher nozzle ceiling. The selected P1S includes AMS. The selected Plus4 needs an additional QIDI Box for automatic colors.
Winner by situation
Start with what you need it to do
Print a 280 mm square part flat
Only Plus4 has sufficient nominal bed dimensions.
- Bambu Lab P1S Combo
- Not suitable
- QIDI Plus4
- Better fit
Print four compatible colors from the selected box
P1S Combo supplies its AMS.
- Bambu Lab P1S Combo
- Better fit
- QIDI Plus4
- Caution
Use a profile requiring active chamber heating
Plus4 documents the heater.
- Bambu Lab P1S Combo
- Caution
- QIDI Plus4
- Better fit
Expect sixteen loaded colors with no accessories
The selected packages do not contain that feeder count.
- Bambu Lab P1S Combo
- Not suitable
- QIDI Plus4
- Not suitable
What matters in practice
The differences that matter
A 280 mm square fixture needs the wider bed
Plus4 has a nominal 305 mm square bed. A flat 280 mm square fixture exceeds both P1S horizontal axes.
How we reached this conclusion
280 mm is 24 mm beyond each P1S nominal horizontal limit and 25 mm inside the Plus4 limit.
A four-color order changes which box is complete
P1S Combo supplies one four-spool AMS. Plus4 requires the optional QIDI Box.
How we reached this conclusion
The compared ASINs are different package types. Neither supplied package provides sixteen loaded colors.
A small engineering part may need the larger machine anyway
Plus4 supplies active chamber heat and a 370 C nozzle limit even when the part fits inside P1S.
How we reached this conclusion
Nozzle temperature and chamber heating are separate requirements in a filament profile.
Choice A
Bambu Lab, P1S Combo
Bambu Lab P1S Combo
The printer provides 256 × 256 × 256 mm build volume. The print area is enclosed.
- Best matched use
- Start with four automatic colors from the supplied AMS
Checked facts
- Nominal build envelope: 256 x 256 x 256 mm
- Selected package feeding: One AMS, four spool positions
- Chamber hardware: Enclosure and regulator fan, no active heater listed
- Nozzle temperature limit: 300 C
Choice B
QIDI, Plus4
QIDI Plus4
The printer provides 305 × 305 × 280 mm build volume. The print area is enclosed.
- Best matched use
- Fit a wider one-piece model
Checked facts
- Nominal build envelope: 305 x 305 x 280 mm
- Selected package feeding: Single spool, QIDI Box optional
- Chamber hardware: Active chamber heating up to 65 C
- Nozzle temperature limit: 370 C
Meaningful differences
What changes the fit
| What changes | Bambu Lab P1S Combo | QIDI Plus4 | Why it matters |
|---|---|---|---|
| Nominal build envelope | 256 x 256 x 256 mm | 305 x 305 x 280 mm | The sliced footprint, brim and excluded regions must also fit. |
| Selected package feeding | One AMS, four spool positions | Single spool, QIDI Box optional | The complete color-printing basket differs. |
| Chamber hardware | Enclosure and regulator fan, no active heater listed | Active chamber heating up to 65 C | A fan-controlled enclosure is a different material tool from a chamber heater. |
| Nozzle temperature limit | 300 C | 370 C | The required material profile can exceed one limit while fitting the other. |
What you give up
Every choice has a cost
If you choose Bambu Lab P1S Combo
- No actively heated chamber is documented.
If you choose QIDI Plus4
- A higher temperature ceiling does not guarantee a successful engineering-polymer print.
Recommendation switch
The decision flips if...
Four-color small parts are the first project
Choose Bambu Lab P1S Combo. P1S Combo includes the automatic feeder.
The flat part exceeds 256 mm or needs active chamber heat
Choose QIDI Plus4. Plus4 addresses those hardware constraints.
I need a 320 mm upright part
Choose neither. Neither nominal height reaches 320 mm.
What matters in practice
How to make the call
A 280 mm square fixture needs the wider bed
For a flat 280 mm fixture, Plus4 offers nominal room to keep the design in one piece. P1S requires a split design or another orientation, which can change supports and load direction through the layers. Check the complete sliced footprint before buying. The size arithmetic does not establish whether the remaining Plus4 margin is enough for your brim.
A four-color order changes which box is complete
For small signs or labels with four compatible colors, the P1S Combo includes the feeder needed to begin. With Plus4, add the QIDI Box and check its material restrictions before comparing the full purchase. Do not replace the original AMS listing with an AMS 2 Pro assumption just because the manufacturer store now sells both configurations.
A small engineering part may need the larger machine anyway
If the selected filament asks for controlled chamber heat or a nozzle setting above 300 C, Plus4 has relevant hardware that P1S does not document. Confirm the bed, nozzle wear surface and drying requirements too. For a supported PLA or PETG job, those higher limits may add nothing to the result. There is no matched strength or warping test here.
What this comparison cannot tell you
- No matched print-quality, strength, reliability or acoustic test was performed. P1S nominal height has a default slicer limit and safety conditions documented by Bambu.
What the facts say
What the comparison shows
Useful conclusions from the current 3D printers comparison, followed by the checked facts used to reach them.
See the checked facts and calculation notes
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| Bambu Lab P1S Combo |
|
|
|
| QIDI Plus4 |
|
|
|
Ready to choose?
Check the price. Read the owner reviews.
Open either model on Amazon to check the current price, customer reviews and delivery options.
Bambu Lab P1S Combo
Start with four automatic colors from the supplied AMS
See price & reviews on AmazonQIDI Plus4
Fit a wider one-piece model
See price & reviews on AmazonLinks open in a new tab.