The Plus4 (prosumer) and Max4 (professional) are a step-up decision within Qidi Tech's lineup: same ecosystem, different class of machine. Note that the Plus4 has been replaced by the Plus5 and is no longer sold new. Both are enclosed CoreXY printers with 4-slot multicolor and automatic calibration. The Max4 costs $350 more and gets you 99% more build volume and a top speed of 800 mm/s (vs 600).
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 →This printer is no longer sold new. It has been replaced by the Qidi Tech Plus5.
Best for: Makers and small businesses who need a large enclosed build volume for engineering materials at a prosumer price — particularly those printing PA-CF, ABS, and PC at scale. Look for clearance deals — the Plus5 is the current model.
Full details →| Qidi Tech Max4 | Qidi Tech Plus4 | |
|---|---|---|
| Pricing | ||
| Starting Price | $1,049 | ★ $699 |
| Print Specs | ||
| Tier | Professional | Prosumer |
| Motion | CoreXY | CoreXY |
| Build Volume | ★ 390 × 390 × 340 mm | 305 × 305 × 280 mm |
| Max Speed | ★ 800 mm/s | 600 mm/s |
| Multicolor | ✅ 4 slots | ✅ 4 slots |
| Enclosure | ✅ | ✅ |
| Auto Calibration | ✅ | ✅ |
| Open Source | ❌ | ❌ |
| Upgrade Kit | — | — |
| Buy Timing | ||
| Released | Dec 1, 2025 | Sep 20, 2024 |
| Cycle length | — | ~408 days |
| Cycle advice | Buy | Superseded |
| Deals advice | Buy | Clearance |
| Next model | — | — |
The Max4 was released on Dec 1, 2025, 346 days ago. It is a first-generation product, so there is no earlier cycle to predict its successor from.
The Plus4 has been replaced by the Plus5 and is no longer sold new, so there is no release cycle left to time — any unit you find now is leftover or second-hand stock.
On timing alone, the Max4 is the safer buy right now — it launched only 346 days ago, while the Plus4 has already been replaced by the Plus5.
Cycle and deal status as of November 12, 2026. See the launch calendar →
The Plus4 lists at $699 and the Max4 at $1,049 — $350 apart, so the Max4 costs 50% more.
Per litre of build volume, that works out to $20 for the Max4 versus $27 for the Plus4 — so the pricier Max4 actually gives you more build space per dollar.
Buy the Max4. The Plus4 has already been replaced by the Plus5 and is no longer sold new, so it is only worth considering at a clearance price. If the Plus4 appealed to you, the fair comparison today is the Max4 against the Plus5.
Compare Qidi Tech Max4 vs Qidi Tech Plus5 →
How we judge timing and deals: read our methodology →
The Max4 offers the largest build volume in Qidi's lineup — enabling large functional parts, architectural models, and production batch runs that exceed Plus5 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.
One of the largest build volumes in the prosumer enclosed category — 40% more printable area than the Bambu X1C at a lower price point.
The second-generation active heating delivers consistent chamber temperatures for PA, PA-CF, ABS, ASA, and PC with minimal warping across the full build plate.
Handles high-performance engineering composites including PA-CF, PET-CF, and PPS-CF without requiring a separate hotend upgrade.