Mares
Mares Fusion 52X
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Best Dive Regulators · head-to-head
Mares Fusion 52X vs Cressi AC25M Master Cromo (corrected from misspelled seed "Master Crono")
A sourced, side-by-side comparison. Cressi AC25M Master Cromo (corrected from misspelled seed "Master Crono") is cheaper at $629.95. Every spec and price links to its source.
Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Mares Fusion 52X |  Cressi AC25M Master Cromo (corrected from misspelled seed "Master Crono") |
|---|---|---|
| US price | — | $629.95 |
| Brand | Mares | Cressi |
| Released | — | — |
| First stage type | diaphragm | piston |
| Balanced | Yes | Yes |
| Din or yoke | DIN and INT (yoke), convertible | DIN (300 bar) and INT/yoke (230 bar) versions |
| Hp lp ports | — | 2 HP / 5 LP (4 on rotating turret + 1 co-axial hi-flow) |
| Cold water rated | Yes | Yes |
| Environmentally sealed | Yes | No |
| Adjustable venturi controls | Twin Power flow-control switch | external IP adjustment (Allen key) + venturi knob + adjustable inhalation effort |
| Weight (g) | — | 1123 |
Sources — Mares Fusion 52X: mares.com (verified 2026-08-11). Cressi AC25M Master Cromo (corrected from misspelled seed "Master Crono"): cressiamerica.com (verified 2026-08-11).
What's the difference between the Mares Fusion 52X and Cressi AC25M Master Cromo (corrected from misspelled seed "Master Crono")?
Where the two actually differ on the specs we track (4 of 8). Matching specs are omitted.
- First stage type: Mares Fusion 52X diaphragm vs Cressi AC25M Master Cromo (corrected from misspelled seed "Master Crono") piston
- Din or yoke: Mares Fusion 52X DIN and INT (yoke), convertible vs Cressi AC25M Master Cromo (corrected from misspelled seed "Master Crono") DIN (300 bar) and INT/yoke (230 bar) versions
- Environmentally sealed: Mares Fusion 52X true vs Cressi AC25M Master Cromo (corrected from misspelled seed "Master Crono") false
- Adjustable venturi controls: Mares Fusion 52X Twin Power flow-control switch vs Cressi AC25M Master Cromo (corrected from misspelled seed "Master Crono") external IP adjustment (Allen key) + venturi knob + adjustable inhalation effort