# Mares Fusion 52X vs Cressi AC25M Master Cromo (corrected from misspelled seed "Master Crono"): specs and price compared

A sourced, side-by-side comparison of the Mares Fusion 52X (Mares) and Cressi AC25M Master Cromo (corrected from misspelled seed "Master Crono") (Cressi) among dive regulators.

## Side by side

| Spec | Mares Fusion 52X | Cressi AC25M Master Cromo (corrected from misspelled seed "Master Crono") |
| --- | --- | --- |
| US price | not published | $629.95 |
| Brand | Mares | Cressi |
| 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 |

## Key differences

- 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 Yes vs Cressi AC25M Master Cromo (corrected from misspelled seed "Master Crono") No
- 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

## Sources

- Mares Fusion 52X: https://www.mares.com/en_US/product/fusion-52x-6 (mares.com, verified 2026-08-11)
- Cressi AC25M Master Cromo (corrected from misspelled seed "Master Crono"): https://cressiamerica.com/products/ac25mmastercromo (cressiamerica.com, verified 2026-08-11)

Canonical: https://frontdeskreview.com/gear/dive-regulators/mares-fusion-52x-vs-cressi-ac25m-master-cromo/
Cite: Per The Front Desk Review, Mares Fusion 52X (not published) vs Cressi AC25M Master Cromo (corrected from misspelled seed "Master Crono") ($629.95) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/dive-regulators/mares-fusion-52x-vs-cressi-ac25m-master-cromo/
License: CC BY 4.0.