Draft entry. Specs not yet verified against the manufacturer.

TUSA

TUSA RS-609 (Yoke)

TUSA's compact, ultra-lightweight balanced diaphragm reg with a click-spring adjustable second stage and a standard MIFLEX hose.

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$499
Released—
First stagediaphragm
BalancedYes
Environmentally sealed—
Cold-water ratedNo
Connectionyoke
Max pressure—
HP / LP ports2 / 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
  • Ultra-compact, lightweight R-600 first stage with 2 HP and 4 LP ports, paired with a stainless steel S-0009 second stage that has a mirror-polished face
  • Click-spring adjustment knob on the second stage lets divers dial in breathing resistance, plus an enlarged purge button for easier operation
  • Ships standard with a flexible MIFLEX hose rather than a basic rubber hose
Cons
  • Needs the separate EK-600 cold water kit for use below 50°F/10°C, it isn't cold-rated out of the box
  • DIN requires a separate DIN-R600 conversion kit rather than being sold DIN-ready
  • TUSA doesn't publish whether the R-600 first stage is environmentally sealed, so this entry is marked draft pending that confirmation

The RS-609 is TUSA’s compact, lightweight recreational regulator built around the R-600 first stage, positioned as an accessible, comfort-focused option below the cold-water-rated RS-790 and RS-1001. It’s aimed at warm-water and travel divers who want a light setup with an adjustable second stage rather than TUSA’s cold-water specialist tier.