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Breathing underwater should feel natural, and that experience is one of the things that most clearly separate Halcyon second stages from our competitors. As soon as you experience the smooth, high volume of air delivered by a Halcyon second stage, you will be hooked. Our high quality second stage regulators provide diver adjustable controls for the ultimate in breathing performance. Halcyon’s Halo second stage offers steadfast reliability, and impeccable performance. Two methods of breathing adjustment make it the top choice for demanding Halcyon divers.
Balanced, downstream valve offers incredibly smooth breathing in all conditions. The design slightly offsets the force of the downstream air entering from the first stage, allowing reduced spring tension and a decreased inhalation resistance. Halcyon first stages are balanced, so the Halo is a perfect fit with either the H-75P or H-50D Halcyon first stage.
Adjustable inhalation control refines breathing effort by way of an easy access control knob. This allows the demanding diver an opportunity to fine-tune the air delivery of the second stage. Meanwhile, our Aura second stage features a pre-set inhalation effort that suits the most common diving conditions, and can be fine tuned by an Authorized Halcyon Dealer.
Air Control Vane (ACV) offers a second diver adjustment for the ability to fine-tune breathing. The ACV uses vacuum-assist technology to reduce work of breathing and increase diver comfort. This level of refinement is available on all Halcyon second stages. ACV in “dive” position gives powerful breathing support, while ACV in “Halcyon” position helps prevent free flows. This can be helpful on the surface, when diving in currents, while scootering, or when the Halo is used as a backup regulator.
Comfort mouthpiece is standard on every second stage to reduce jaw fatigue and mouth irritation. This long lasting mouthpiece requires only a minimum effort to hold comfortably in place. In combination with the freedom of head movement, provided by Halcyon’s primary long hose, you will enjoy dives free from the jaw fatigue, common with certain mouthpieces and/or poorly balanced hose routing.
The Halo provides amazingly smooth performance in all conditions providing unsurpassed performance with enhanced technology.
Comes standard with 40" hose
Frequently Purchased Together
Halcyon offers the original purchaser a one-year manufacturers warranty against material and workmanship defects on all of its products. Beyond this standard coverage, Halcyon also offers the original purchaser two separate lifetime warranties, one covering all RF-welded seams used in the construction of MC bladders, surface signaling and lift devices, and the second covering Halcyons primary light canisters. In order to maintain both the one-year manufacturers warranty and the lifetime warranty (where applicable) the original purchaser must retain their sales receipt.
Certain items, such as NiMH and SLA batteries, are covered by a 90-day conditional warranty that commences on the date of customer purchase. Following Halcyons recommended use and service guidelines provided in the manuals is essential in extending the practical lifetime of expendable items such as batteries and light bulbs.
The Halcyon warranty is a global warranty. As long as the customer has a valid sales receipt from an authorized Halcyon dealer, the warranty extends to all countries and shops, regardless of where the item was purchased. Any authorized Halcyon dealer can handle warranty returns to the factory with a valid receipt.
Unauthorized modifications/repairs, negligence, accidental damage, commercial use, or abuse are not covered by the warranty. Floods, leaks, punctures, and broken bulbs etc., are not covered by the warranty unless they are the direct result of a material or workmanship defect.