The catch
Bambu Lab P1S Combo
Bed limits hold back wider flat models.
Side by side
Bambu Lab P1S Combo vs QIDI Plus4 compared: Plus4 needs an extra QIDI Box, P1S includes color feeding
Quick verdict
If four-color prints are part of your first project and the 256 mm nominal bed of the P1S Combo is enough, that is the one to get. If the part needs a larger footprint, or the material profile calls for the actively heated chamber and higher nozzle ceiling of the Plus4, get that instead. The selected P1S includes AMS. Automatic colors on the selected Plus4 need an additional QIDI Box.
Before you buy
Why, and what it costs you
The wider bed is what a 280 mm square fixture needs
The nominal bed on Plus4 is a 305 mm square. A flat 280 mm square fixture is larger than both P1S horizontal axes.
Where this comes from
280 mm goes 24 mm past each P1S nominal horizontal limit and sits 25 mm inside the Plus4 limit.
The catch
QIDI Plus4
QIDI Box is not in the selected package.
Bambu Lab P1S Combo
- Why pick it
- Begin with four colors switched automatically by the supplied AMS
- Print compatible parts that fit the bed in an enclosed printer
- The catch
- Bed limits hold back wider flat models.
QIDI Plus4
- Why pick it
- Print a wider model whole
- Get an active chamber documented at 65 C
- The catch
- QIDI Box is not in the selected package.
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What this page compares
P1S Combo and Plus4 compared for four-color work, a flat 280 mm part and filament profiles that need active chamber heating.
If four-color prints are part of your first project and the 256 mm nominal bed of the P1S Combo is enough, that is the one to get. If the part needs a larger footprint, or the material profile calls for the actively heated chamber and higher nozzle ceiling of the Plus4, get that instead. The selected P1S includes AMS. Automatic colors on the selected Plus4 need an additional QIDI Box.
Which one fits
Pick the situations that sound like you
Lay a 280 mm square part flat to print
Plus4 is the only one with large enough nominal bed dimensions.
- Bambu Lab P1S Combo
- Not suitable
- QIDI Plus4
- Better fit
Print four compatible colors straight from the selected box
Its AMS comes with P1S Combo.
- Bambu Lab P1S Combo
- Better fit
- QIDI Plus4
- Caution
Run a profile that requires active chamber heating
The heater is documented for Plus4.
- Bambu Lab P1S Combo
- Caution
- QIDI Plus4
- Better fit
Expect to have sixteen colors loaded without any accessories
The selected packages do not reach that feeder count.
- Bambu Lab P1S Combo
- Not suitable
- QIDI Plus4
- Not suitable
In practice
Differences you will notice
The wider bed is what a 280 mm square fixture needs
The nominal bed on Plus4 is a 305 mm square. A flat 280 mm square fixture is larger than both P1S horizontal axes.
How we worked this out
280 mm goes 24 mm past each P1S nominal horizontal limit and sits 25 mm inside the Plus4 limit.
A four-color order changes which package is complete
One four-spool AMS comes with P1S Combo. The optional QIDI Box is required for Plus4.
How we worked this out
The ASINs being compared are different package types. Neither supplied package gives you sixteen loaded colors.
Even a small engineering part may call for the larger machine
Plus4 comes with active chamber heat and a 370 C nozzle limit, even if the part would fit inside P1S.
How we worked this out
In a filament profile, nozzle temperature and chamber heating are two separate requirements.
Option A
Bambu Lab, P1S Combo
Bambu Lab P1S Combo
Build volume is 256 × 256 × 256 mm, and the print area is enclosed.
- Best for
- Begin with four colors switched automatically by the supplied AMS
Facts we checked
- Nominal build space: 256 x 256 x 256 mm
- Feeding in the selected package: One AMS with four spool positions
- Chamber hardware: An enclosure and a regulator fan, with no active heater listed
- Nozzle temperature cap: 300 C
Option B
QIDI, Plus4
QIDI Plus4
This enclosed printer has 305 × 305 × 280 mm of build volume.
- Best for
- Print a wider model whole
Facts we checked
- Nominal build space: 305 x 305 x 280 mm
- Feeding in the selected package: A single spool, with QIDI Box optional
- Chamber hardware: Active heating of the chamber up to 65 C
- Nozzle temperature cap: 370 C
Spec by spec
Where they really differ
| Spec | Bambu Lab P1S Combo | QIDI Plus4 | In practice |
|---|---|---|---|
| Nominal build envelope | 256 x 256 x 256 mm | 305 x 305 x 280 mm | The sliced footprint, the brim and the excluded regions have to fit as well. |
| Selected package feeding | One AMS, four spool positions | Single spool, QIDI Box optional | The full color-printing basket is not the same. |
| Chamber hardware | Enclosure and regulator fan, no active heater listed | Active chamber heating up to 65 C | For materials, a fan-controlled enclosure is a different tool from a chamber heater. |
| Nozzle temperature limit | 300 C | 370 C | A required material profile can be over one limit and still fit within the other. |
Trade-offs
What each pick costs you
With Bambu Lab P1S Combo
- A chamber that is actively heated is not documented.
With QIDI Plus4
- A higher temperature ceiling is no guarantee that an engineering-polymer print will succeed.
Change of plan
When the answer changes
The first project is small parts in four colors
Go with Bambu Lab P1S Combo. The automatic feeder is included with P1S Combo.
Either the flat part goes past 256 mm or it needs active chamber heat
Go with QIDI Plus4. Those hardware constraints are addressed by Plus4.
My upright part needs to be 320 mm
Neither model fits. 320 mm is beyond both nominal heights.
Decision guide
How to decide
The P1S Combo is the match when four-color prints belong to the first project and a 256 mm nominal bed is enough. A larger footprint, or a material profile that needs an actively heated chamber and a higher nozzle ceiling, points to the Plus4. Note the difference in what is selected: the P1S has AMS included, whereas the Plus4 would need a separately bought QIDI Box for automatic colors.
The wider bed is what a 280 mm square fixture needs
For a flat 280 mm fixture, the Plus4 has enough nominal room to hold the design in a single piece, while the P1S would require a split design or another orientation. That in turn can change supports and the direction loads travel through the layers. Before buying, check the complete sliced footprint, because the size arithmetic cannot tell you whether the Plus4 margin that remains is enough for your brim.
A four-color order changes which package is complete
For small signs or labels in four compatible colors, you can begin right away with the P1S Combo, since it includes the feeder. The Plus4 needs the QIDI Box added, and its material restrictions checked, before you weigh up the whole purchase. The manufacturer store now sells both AMS configurations, but do not let that tempt you into assuming an AMS 2 Pro in place of the original AMS listing.
Even a small engineering part may call for the larger machine
Does the selected filament demand controlled chamber heat, or a nozzle setting beyond 300 C? Then the Plus4 has relevant hardware that the P1S does not document. Also verify the bed, the wear surface of the nozzle and the drying requirements. Those higher limits may add nothing to a supported PLA or PETG job. A matched strength or warping test is not available here.
What this page can’t tell you
- Bambu documents a default slicer limit and safety conditions on the nominal height of the P1S. No like-for-like test of print quality, strength, reliability or noise was run.
By the numbers
What the data shows
What we found across the 3D printers we compare, plus the checked facts behind each finding.
Show the facts and the math
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| Bambu Lab P1S Combo |
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| QIDI Plus4 |
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Ready to buy
See today’s price and what owners say
Open either model on Amazon for the current price, customer reviews and delivery options.
Bambu Lab P1S Combo
Begin with four colors switched automatically by the supplied AMS
See price & reviews on AmazonQIDI Plus4
Print a wider model whole
See price & reviews on AmazonEach link opens in a new tab.
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