The Apeks MTX-RC Stage 3 Regulator Set packages the primary MTX-RC with the matching Octopus for an attractive little saving compared to purchasing separately.
The MTX-RC is a modified version of the the original MTX-R that was designed to meet the requirements of the United States Navy Experimental Dive Unit extreme cold water test. In order to achieve this tough test the MTX-R is factory tuned with no diver adjustment. Apeks created the MTX-RC to give divers the option of fine tuning their regulator performance to suit their diving.
The MTX-RC first stage is engineered for the extreme cold with heat exchanging fins on nearly every surface. The over balanced diaphragm design is environmentally sealed to both help protect the internal components from ice crystal formation and also prevent damage from contamination. There are two pre-angled high pressure ports, four low pressure ports on the side of a swivelling turret and a high flow port of the end beneath a protective cap.
The second stage now features an oversized breathing effort adjuster on the side of the housing that will increase the amount of effort required to open the pneumatically balanced valve. Above that there is a venturi lever to alter the flow of air within the second stage, either directing it from the valve towards the mouthpiece or diverting it back towards the diaphragm to help close the valve. The second stage also features a large heat exchanger on the hose inlet to help increase the temperature as it passes into the second stage.