# Atomic Aquatics B2 vs Cressi AC25M Master Cromo (corrected from misspelled seed "Master Crono"): specs and price compared

A sourced, side-by-side comparison of the Atomic Aquatics B2 (Atomic Aquatics) and Cressi AC25M Master Cromo (corrected from misspelled seed "Master Crono") (Cressi) among dive regulators.

## Side by side

| Spec | Atomic Aquatics B2 | Cressi AC25M Master Cromo (corrected from misspelled seed "Master Crono") |
| --- | --- | --- |
| US price | not published | $629.95 |
| Brand | Atomic Aquatics | Cressi |
| First stage type | piston | piston |
| Balanced | Yes | Yes |
| Din or yoke | DIN and yoke | DIN (300 bar) and INT/yoke (230 bar) versions |
| Hp lp ports | 2 HP / 5 LP (on swivel cap) | 2 HP / 5 LP (4 on rotating turret + 1 co-axial hi-flow) |
| Cold water rated | — | Yes |
| Environmentally sealed | Yes | No |
| Adjustable venturi controls | AFC (Automatic Flow Control) with manual detune knob | external IP adjustment (Allen key) + venturi knob + adjustable inhalation effort |
| Weight (g) | 1134 | 1123 |

## Key differences

- Din or yoke: Atomic Aquatics B2 DIN and yoke vs Cressi AC25M Master Cromo (corrected from misspelled seed "Master Crono") DIN (300 bar) and INT/yoke (230 bar) versions
- Hp lp ports: Atomic Aquatics B2 2 HP / 5 LP (on swivel cap) vs Cressi AC25M Master Cromo (corrected from misspelled seed "Master Crono") 2 HP / 5 LP (4 on rotating turret + 1 co-axial hi-flow)
- Environmentally sealed: Atomic Aquatics B2 Yes vs Cressi AC25M Master Cromo (corrected from misspelled seed "Master Crono") No
- Adjustable venturi controls: Atomic Aquatics B2 AFC (Automatic Flow Control) with manual detune knob vs Cressi AC25M Master Cromo (corrected from misspelled seed "Master Crono") external IP adjustment (Allen key) + venturi knob + adjustable inhalation effort
- Weight (g): Atomic Aquatics B2 1134 vs Cressi AC25M Master Cromo (corrected from misspelled seed "Master Crono") 1123

## Sources

- Atomic Aquatics B2: https://www.atomicaquatics.com/product/b2-regulator/ (atomicaquatics.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/atomic-aquatics-b2-vs-cressi-ac25m-master-cromo/
Cite: Per The Front Desk Review, Atomic Aquatics B2 (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/atomic-aquatics-b2-vs-cressi-ac25m-master-cromo/
License: CC BY 4.0.