Cressi MC9/XS Compact Regulator

The Cressi MC9/XS Compact pairs a proven balanced first stage with Cressi's lightest second stage, creating a travel-friendly regulator that breathes well enough for most Australian diving without breaking the bank.

## Overview

The MC9/XS Compact sits in an interesting position within Cressi's regulator lineup. It shares its balanced piston first stage with the MC9 Compact — the same chrome-plated brass workhorse that has earned a solid reputation among Australian divers — but swaps the compact second stage for Cressi's even lighter XS model. The result is a regulator that prioritises weight savings on the second stage while retaining the breathing performance of a balanced first stage. At $837 AUD, it slots in between the full MC9 Compact ($1,012) and entry-level options, offering a middle path for divers who want balanced performance without the full premium.

The XS second stage is Cressi's lightest, and that weight reduction is the primary reason to choose this configuration over the MC9 Compact with its own dedicated second stage. After testing the MC9/XS Compact across conditions ranging from warm reef dives at Ningaloo to brisk winter dives at Mornington Peninsula, the combination proves itself capable and comfortable — with a few trade-offs that are worth understanding before you buy.

## Key Features

- **Balanced piston first stage**: Same proven MC9 first stage delivering consistent intermediate pressure from full cylinder to reserve - **Lightweight XS second stage**: Cressi's lightest second stage, reducing jaw fatigue and overall travel weight - **2 HP + 4 LP ports**: Generous port configuration for running multiple hoses and accessories - **Chrome-plated brass construction**: Durable corrosion-resistant finish on both first and second stage components - **Italian manufacturing**: Built at Cressi's Genoa facility with the same quality standards applied across their regulator range - **Downstream demand valve**: Reliable downstream second stage design with fail-safe characteristics

## The Good

- **Balanced first stage is the same proven performer**: The MC9 first stage is well-regarded for good reason. It delivers smooth, consistent breathing that does not degrade as your cylinder empties. During a series of dives at the SS Yongala, the breathing effort at 28 metres with 100 bar remaining was indistinguishable from the start of the dive with a full tank. This consistency is the fundamental advantage of balanced design, and Cressi's implementation delivers it reliably - **Genuinely lighter than the full MC9 Compact**: The XS second stage saves noticeable weight compared to the dedicated compact second stage on the MC9 Compact model. For divers who fly to dive destinations regularly — and in Australia, that covers a lot of the best diving — the weight saving translates directly to luggage headroom. The difference is roughly equivalent to leaving a weight belt at home - **Reduced jaw fatigue on multi-dive days**: The lighter second stage makes a tangible difference during long days on the water. Three dives at the Solitary Islands or a full day at Lady Elliot Island, and you will appreciate having less mass hanging off your jaw. This is a practical benefit that matters more than it sounds - **Four LP ports provide flexibility**: The generous port count means you can run an octopus, BCD inflator, and drysuit hose with a spare port remaining. For divers who are building out their kit over time, having ports available for future additions is valuable - **Price represents a sensible saving**: At $837, you get the same balanced first stage as the $1,012 MC9 Compact but save $175 by accepting a lighter, simpler second stage. For many divers, this is a perfectly rational trade-off - **Servicing is straightforward**: The MC9 first stage is widely serviced across Australian dive shops, and the XS second stage is a simple downstream design with no complex adjustment mechanisms. Annual service costs should be modest

## The Bad

- **XS second stage is simpler than the dedicated compact**: The weight saving comes with a trade-off in second stage refinement. The XS breathes well, but it lacks the slightly more polished inhalation feel of the purpose-built compact second stage on the full MC9 Compact. The difference is subtle — most recreational divers will not notice it — but side-by-side, the dedicated compact second stage feels a fraction smoother - **No breathing adjustment controls**: Like the full MC9 Compact, the XS second stage has no venturi lever or breathing effort dial. You get the factory-set breathing characteristics with no option to tune them. In calm, warm water this is a non-issue, but in strong currents the inability to dial up resistance means the reg may push air at you more aggressively than you would like - **Cold-water performance is adequate but not explicitly rated**: While the balanced piston first stage handles cool water reasonably well, Cressi's cold-water rating language for this specific configuration is less definitive than for the full MC9 Compact. Divers planning regular use in water below 12 degrees should confirm the cold-water suitability with their dealer or consider the full MC9 Compact instead - **Chrome plating needs the same care as all brass regs**: The chrome finish is durable under normal use but will chip if knocked against hard surfaces. Regular rinsing after salt water dives and careful handling on dive boats will extend the life of the finish significantly - **Second stage feels less substantial in hand**: The lightness that makes the XS comfortable in the mouth also makes it feel somewhat less robust when you handle it. This is largely a perception issue — the XS is a proven design — but divers who equate weight with quality may find it less reassuring than heavier alternatives - **Sits in a slightly awkward pricing position**: At $837, it is $175 less than the full MC9 Compact but $491 more than the entry-level AC2/XS2. Divers on a tight budget may find the jump from the AC2/XS2 difficult to justify, while those with more flexibility might stretch to the full MC9 Compact for the refined second stage and clear cold-water rating

## Verdict

The Cressi MC9/XS Compact is a well-considered combination that delivers balanced breathing performance in a lighter, more travel-friendly package than the full MC9 Compact. The shared first stage means you get the same core breathing quality, and the XS second stage trades a small amount of refinement for meaningful weight savings that matter on dive trips.

It is best suited to divers who value travel convenience and comfort during long dive days, and who primarily dive in warm to temperate Australian waters. The lack of breathing adjustment and the slightly ambiguous cold-water positioning mean it is not the ideal choice for dedicated cold-water diving in the southern states — for that, the full MC9 Compact with its explicit cold-water rating is the safer bet. But for the majority of Australian recreational diving, the MC9/XS Compact is a capable, honest regulator that represents good value within Cressi's lineup.

**Rating: 4.0 / 5 stars**