Aqualung

Aqualung Calypso (Yoke)

Aqualung's entry-level piston set, simple and low-maintenance, with a genuinely adjustable Venturi second stage.

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$389
Released—
First stagepiston
BalancedNo
Environmentally sealedNo
Cold-water rated—
Connectionyoke
Max pressure232 bar
HP / LP ports1 / 4
Adjustable 2nd stageYes
Weight—
Nitrox-ready (EAN40)Yes
Octo includedNo

"HP / LP ports" is the number of high-pressure and low-pressure ports on the first stage, which caps how many accessories (transmitter, SPG, inflator, second second-stage) you can run at once.

Pros
  • Adjustable Venturi switch with min/max settings gives real diver control over airflow, unusual at this budget tier
  • Simple unbalanced piston design that's historically easy and cheap to service
  • Nitrox-ready to 40% out of the box
Cons
  • Unbalanced piston first stage and unbalanced second stage mean breathing effort drifts more as tank pressure drops and at depth
  • No environmental sealing or dry chamber, not suited to cold or silty/contaminated water
  • No octopus confirmed as part of this base set, factor that into total cost

The Calypso is Aqualung’s budget entry point, a straightforward unbalanced piston paired with an adjustable-airflow second stage. It’s positioned well below the Helix and Helix Pro in the lineup, trading sealed, balanced performance for a lower price and simpler maintenance.