STORY LINE The Titan LX is new and improved — and that's more than just marketing. Fresh from a revamp that some might say wasn't needed, the result is plenty appealing. KEY FEATURES A diaphragm first stage that, by design, is sealed against the environment, is also incredibly compact. It includes Aqua Lung's ACD (auto-closure device), which automatically seals the first stage when it's depressurized from a tank, thus protecting internal parts from moisture. The first stage is plumbed with four MP and one HP port. The system's second stage is also modestly sized and pneumatically balanced. It features a Venturi-adjustment lever that helps kill free-flow at the surface, a Comfo-bite mouthpiece for reduced jaw fatigue and a wide exhaust tee to help keep the diver's vision clear. DIVER IMPRESSIONS Aqua Lung's update was sufficient because we really can't find anything else to improve. Breathing performance was outstanding and comparable to only one other reg in our group. We're big, big fans of the ACD device, since it allows the reg to be given a freshwater bath without flooding the first stage, and we still love the Comfo-bite mouthpiece. The Venturiadjustment switch was easy to find and manipulate with gloves, and the exhaust tee positively slings bubbles away from the diver's face. MSRP $440 CONTACT aqualung.com.