Apeks

Apeks MTX-RC (DIN)

Apeks's cold-water technical flagship, built with military-spec freeze resistance for divers who need a regulator that won't free-flow in the worst conditions.

Environmentally sealed, cold-water rated

Sealed first stage keeps water and ice crystals out of the internal mechanism, the standard for diving below 50°F/10°C.

Apeks MTX-RC (DIN)
3.7Comparison Score
$1149
Buy on Amazon
Released2020
First stagediaphragm
BalancedYes
Environmentally sealedYes
Cold-water ratedYes
ConnectionDIN
Max pressure300 bar
HP / LP ports2 / 5
Adjustable 2nd stageYes
Weight1193g
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
  • Over-balanced diaphragm first stage and over-moulded endcap are purpose-built for extreme cold, not just cold-water "rated" as an afterthought
  • Diver Changeable Exhaust lets you swap between small and large exhaust tees, and both are included in the box
  • User-adjustable breathing effort control on the second stage means you can fine-tune it dive to dive
Cons
  • No octopus included at this price, so budget for a second stage separately if you need a full set
  • Also sold in Yoke and M26 versions, confirm the listing matches this DIN spec before buying
  • Premium price puts it well above Apeks's mid-tier diaphragm regs like the XTX50
Diver community sentiment
Mixed opinions

Scubaboard divers are split on the MTX-RC. Some owners praise it as smooth-breathing, well-built, and uniquely adjustable, letting them dial cracking effort down for warm water or up for deep cold-water dives, calling it "two regulators in one." Others are far more critical: one experienced diver who disassembled a unit called it poorly made with worse work-of-breathing than a rental reg, and several posters note it's essentially untested in the tech-diving community compared to decades-proven designs. A recurring theme is that the MTX-RC is notoriously difficult to service, and it has suffered persistent US backorder problems, with some buyers importing from the EU instead.

Scubaboard: MTX-RC owner reviewScubaboard: MTX-RC vs MTX-R criticismScubaboard: servicing difficulty discussion

Summarized from public forum discussion (Scubaboard, Reddit, and similar), not a survey we ran ourselves. See the linked threads for the original conversations.

The MTX-RC sits at the top of Apeks’s diaphragm lineup, aimed at technical and cold-water divers who want the most freeze-resistant regulator the brand makes. It shares its over-balanced first stage and Diver Changeable Exhaust system with the EVX200 but adds a more adjustable second stage and a higher-spec finish to match its flagship positioning.