Atomic Aquatics
Atomic Aquatics B2
—
Best Dive Regulators · head-to-head
Atomic Aquatics B2 vs Mares Fusion 52X
A sourced, side-by-side comparison. Atomic Aquatics B2 is cheaper at —. Every spec and price links to its source.
Mares
Mares Fusion 52X
—
Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec |  Atomic Aquatics B2 |  Mares Fusion 52X |
|---|---|---|
| US price | — | — |
| Brand | Atomic Aquatics | Mares |
| Released | — | — |
| First stage type | piston | diaphragm |
| Balanced | Yes | Yes |
| Din or yoke | DIN and yoke | DIN and INT (yoke), convertible |
| Hp lp ports | 2 HP / 5 LP (on swivel cap) | — |
| Cold water rated | — | Yes |
| Environmentally sealed | Yes | Yes |
| Adjustable venturi controls | AFC (Automatic Flow Control) with manual detune knob | Twin Power flow-control switch |
| Weight (g) | 1134 | — |
Sources — Atomic Aquatics B2: atomicaquatics.com (verified 2026-08-11). Mares Fusion 52X: mares.com (verified 2026-08-11).
What's the difference between the Atomic Aquatics B2 and Mares Fusion 52X?
Where the two actually differ on the specs we track (3 of 8). Matching specs are omitted.
- First stage type: Atomic Aquatics B2 piston vs Mares Fusion 52X diaphragm
- Din or yoke: Atomic Aquatics B2 DIN and yoke vs Mares Fusion 52X DIN and INT (yoke), convertible
- Adjustable venturi controls: Atomic Aquatics B2 AFC (Automatic Flow Control) with manual detune knob vs Mares Fusion 52X Twin Power flow-control switch