The Magnum delivered excellent work of breathing scores on the ANSTI breathing simulation tests that are conducted at an independent testing facility in Panama City, Florida. In real-world diving in the ocean off the Florida Keys and in the springs of Central Florida, test divers agreed with the breathing machine tests, rating the Magnum very good in all categories. The regís balanced piston first stage delivers plenty of air at a stable intermediate pressure and features Sherwoodís patented Dry Air Demand System that keeps the interior of the first stage clean and dry.
