First-generation product — recently released, still early days
Best for: Professional makers and small studios who need the maximum enclosed build volume in Qidi's lineup for large engineering parts, architectural models, or batch production — at a price point below the Bambu H2S.
Full details →Early in release cycle — no urgency to wait
Best for: Professional makers and studios who need Bambu's largest enclosed build volume for high-throughput production, engineering materials, and optional AMS multicolor — without the complexity of dual-nozzle printing.
Full details →| Qidi Tech Max4 | Bambu Lab H2S | |
|---|---|---|
| Tier | Professional | Professional |
| Motion | CoreXY | CoreXY |
| Build Volume | 390 × 390 × 340 mm | 340 × 320 × 340 mm |
| Max Speed | 800 mm/s | 1000 mm/s |
| Multicolor | ✅ 4 slots | ✅ 4 slots |
| Enclosure | ✅ | ✅ |
| Auto Calibration | ✅ | ✅ |
| Open Source | ❌ | ❌ |
| Upgrade Kit | — | — |
| Materials | PLA, PETG, ABS, ASA, TPU, PA, PA-CF, PC, PPS-CF | PLA, PETG, ABS, ASA, TPU, PA, PA-CF, PC, PETG-CF, PPS |
| Released | Dec 1, 2025 | Aug 26, 2025 |
| Cycle length | — | ~730 days |
| Cycle advice | Buy | Buy |
| Deals advice | Caution | Caution |
| Next model | — | — |
The Max4 offers the largest build volume in Qidi's lineup — enabling large functional parts, architectural models, and production batch runs that exceed Plus4 capacity.
The Max4's closed-loop XY adds positional feedback for improved accuracy at high speeds — a differentiating feature at this price tier that reduces dimensional errors on large prints.
Qidi's proven active chamber heating technology scaled to a 390×390 mm bed — critical for consistent ABS, ASA, PA-CF, and PPS-CF results across the full build plate.
The H2S offers 220% the print volume of the X1C. At 1000 mm/s it is also Bambu's fastest printer, making it the top choice for high-throughput professional production.
The enclosed chamber with active heating handles the full engineering filament spectrum — ABS, ASA, PA, PA-CF, PC, and PPS — with consistent results across the full build plate.
The H2S supports up to 12 AMS units (4 AMS 2 Pro + 8 AMS HT), enabling 24-filament printing for large-format multicolor production.