Breathe Easy: ScubaLab Tests 13 New Dive Regulators

ScubaLab tests more equipment and collects more data than anybody in diving, and the annual regulator evaluation is our test team’s favorite. From a data-gathering perspective, a reg’s complex design allows us to really peel back the performance layers — using both sophisticated lab machinery as well as down-and-dirty dive work. This year, nine brands sent 13 new or redesigned models to be tested.

OVER $500

1. AQUA LUNG LEGEND LUX

FEATURES: the new-generation Legend Lux is a head-turner, with its gold accents and sculpted gold port plugs. The second stage is smaller and lighter than earlier versions, and it is equipped with Aqua Lung’s new Master Breathing system knob that both controls the direction of air and adjusts breathing effort.

PERFORMANCE: On the breathing machine, the Lux outpaced other models in its price category, racking up perfect scores. Up-shifting into muscle mode, it easily handled the extreme bonus breathing rate while reaching the deepest depth in its price category. The Lux really shined in ocean tests, turning in above-average scores in all ergo categories. Divers found the reg to be an effortless breather in all positions, dry and easy to purge. The Comfo-bite mouthpiece was a favorite.

BOTTOM LINE: Aqua Lung hyped this reg when it first hit the market, but we have to admit, it does not disappoint. For sheer breathing performance, reserve capacity and comfort in the water, the Legend Lux was this year’s undisputed Testers’ Choice in this price category.

TESTERS’ CHOICE

BREATHING SIMULATOR PERFORMANCE: Excellent-PLUS | REAL-WORLD PERFORMANCE: Very Good

2. AQUA LUNG LEGEND

FEATURES: Compared with the Lux, the Legend is plain-Jane with a typical polished chrome over brass first stage, and a second stage that eschews color accents and uses a standard venturi switch.

PERFORMANCE: Although the Legend isn’t as exciting to look at as the Lux, when it comes to performance, it's no shrinking violet. It was virtually identical to its costlier cousin on the breathing machine, and although it couldn’t go quite as deep when subjected to extremely high breathing rates, it got pretty darn close. Rated “one of the nicest breathers of the group,” it was able to match the ocean performance of the more expensive Lux, except when it came to the mouthpiece. While the standard version was deemed “OK,” testers preferred the Comfo-bite that was used on the Lux.

BOTTOM LINE: With the exception of the first- stage coating, color accents and second-stage user controls, the Legend is basically the same reg as the Lux. This is especially true when it comes to performance, which is top drawer. Match that to its price, and you’ve got a Best Buy.

BREATHING SIMULATOR PERFORMANCE: Excellent-PLUS | REAL-WORLD PERFORMANCE: Good to Very Good

3. BEUCHAT VR200/ICEBERG

FEATURES: With a new U.S. distribution deal, Beuchat is reappearing in more dive stores. This is great news for gear heads. Case in point: the VR200/Iceberg. Designed for diving in temperate to super-cold waters, the first stage is built rugged, and the second stage is made of metal with blue thermoplastic accents.

PERFORMANCE: A solid performer in the lab, the Iceberg’s work of breathing at the test level most closely representing recreational diving was rated Excellent. As depths and breathing rates increased, the Iceberg soldiered on, well into muscle reg territory. Skeptical test divers quickly turned into fans, giving it Very Good scores in every ergo test category. User controls are efficient and easy to handle, especially the knurled breathing resistance knob.

BOTTOM LINE: The Iceberg earned the second- highest number of tester “favorite” points. It’s a solid performer — and sharp looking to boot. One nitpick: The placement of its first-stage ports limits space between LP hose and HP port, which can make for a tight fit for a hoseless DC transmitter.

BREATHING SIMULATOR PERFORMANCE: Very Good to Excellent- PLUS | REAL-WORLD PERFORMANCE: Very Good

4. MARES ABYSS 52

FEATURES: The Abyss 52 combines a sleek, mostly metal second stage with a very compact first stage offering a pair of high-flow Dynamic Flow Control ports for hooking up second stages and octos. The first stage also offers a bonus for divers who use hoseless air integrated computers, with plenty of room to get a standard wrench in to tighten those annoyingly narrow nuts found on most transmitters. The well-shaped second stage has a center purge button but no user controls.

PERFORMANCE: The Abyss 52 is a workhorse where it counts. On the breathing machine, it delivered a consistent flow of air and an above-average work of breathing at each of the standard test levels. Test divers rated the Abyss better than average in the swimming position and thought its easy-press purge cleared water quickly without blasting throats, but some found the reg to be a rather noisy breather.

BOTTOM LINE: For divers who want a very capable breather that’s friendly to cold water and hoseless DC transmitters, the Abyss 52 is made to order.

BREATHING SIMULATOR PERFORMANCE: Good to Very Good | REAL-WORLD PERFORMANCE: Good to Very Good

5. MARES CARBON 52

FEATURES: Sharing the same MR52 first stage as the Abyss, the Carbon’s claim to fame is its 100 percent carbon construction. The casing is very light and very strong with good thermal conductivity for cold water. It has no user controls, instead using a specially shaped deflector with an air bypass tube to direct air for easy breathing regardless of depth.

PERFORMANCE: Compared with the Abyss, the Carbon’s mouthpiece sits farther from the face, and testers thought it felt bulky in the mouth. Because the exhaust tee reaches farther beneath the mouthpiece, it rubbed uncomfortably against some testers’ chins. That aside, the reg performed in line with the Abyss in the water. On the breathing machine, however, it was able to crank out better work of breathing. Where the Abyss scored Very Good, the Carbon scored Excellent; where the Abyss scored Good, the Carbon scored Very Good.

BOTTOM LINE: Dubbed the “Darth Vader” reg by test divers for its cool carbon look, this high-end breather feels a little different in the mouth, something that will require a period of adjustment. But overall performance is on point.

BREATHING SIMULATOR PERFORMANCE: Very Good to Excellent | REAL-WORLD PERFORMANCE: Good to Very Good

UNDER $500

6. AERIS Ion LT/AT600

FEATURES: One of the lightest models in this year’s shoot-out, Aeris’ flagship reg is a pocket-size breather designed for the traveling diver. The second stage offers both a dive/predive switch and a pneumatically balanced valve that maintains preferred breathing resistance throughout the dive. Set it once; from then on it will automatically adjust to deliver a consistent flow of air regardless of depth.

PERFORMANCE: For such a small reg, the Ion LT delivers quite a punch. It turned in stellar breathing-machine performance across Scubalab’s standard test levels. In ocean tests, divers loved this reg. It breathed dry and easy in all positions, and the full-cover purge got the job done. The dive/predive switch was small and unmarked, so finding the proper position was confusing. The multicompound mouthpiece was rated the undisputed favorite in this year’s roundup.

BOTTOM LINE: With some of the best scores on the machine and in the water, plus the top of testers’ favorites lists, the Ion LT/AT600 earned the Testers’ Choice in the under $500 category.

TESTERS’ CHOICE

BREATHING SIMULATOR PERFORMANCE: Very Good to Excellent | REAL-WORLD PERFORMANCE: Good to Very Good

7. BEUCHAT VRT80/EVOLUTION

FEATURES: The VRT80/Evolution — or Evo — is designed for both temperate and cold water. A compact first stage with only one HP port is mated to a no-frills second stage armed with a venturi switch designed to regulate free-flows.

PERFORMANCE: On the breathing machine, the Evo cranked out Excellent work of breathing at the test level most closely representing recreational diving, and very good work of breathing everywhere else. When pushed into the realm of muscle regs, the Evo was able to handle extreme breathing rates and deep depths with the best of them — regardless of price. This near-effortless display continued into the ocean tests, impressing test divers with easy breathing in all positions. Some complained the mouthpiece was too small; others felt it was comfy but could use larger bite tabs.

BOTTOM LINE: the Evo replaces flash with down-and-dirty breathing performance, offering solid real-world functionality along with more reserve capacity than models costing twice as much, earning the Best Buy nod for this price category.

BREATHING SIMULATOR PERFORMANCE: Very Good to Excellent | PLUS REAL-WORLD PERFORMANCE: Good to Very Good

8. IST SPORTS R860

FEATURES: IST Sports’ flagship R860 is all business. One of the heaviest regs in this group, the balanced-diaphragm first stage is equipped with an environmental kit for diving cold or brackish water. The second stage is a bit larger in diameter than average, with two user controls: the dive/predive lever detunes the reg to minimize free-flows, and the breathing-resistance knob regulates airflow with increasing depth.

PERFORMANCE: The breathing machine proved that the R860 can deliver air efficiently. It turned in Excellent work of breathing at simulated recreational diving levels, and Good to Very Good work of breathing at the deeper depths and higher breathing rates. During ocean tests, the model proved to be a very good breather in the swimming position, a good breather in alternate positions, and a pretty dry breather in all positions but head-down.

BOTTOM LINE: Overall, the R860 is a solid midpack performer. Test divers were split on the comfort of the mouthpiece but otherwise felt the reg was a respectable rec-level breather.

BREATHING SIMULATOR PERFORMANCE: Good to Excellent | REAL-WORLD PERFORMANCE: Good to Very Good

9. MARES INSTINCT 12S

FEATURES: The Instinct combines a tried-and- true first stage with a new-age second stage. The 12S first stage has a long-standing reputation for reliability. The Instinct second stage is quite attractive, offering an interesting hydrodynamic shape and a purge button on top of the casing, so there’s no exhaust tee. Instead, bubbles exit the casing through a small circular orifice.

PERFORMANCE: On the breathing machine, the Instinct turned in respectable work of breathing, with its best behavior found at the test level most closely representing recreational diving. With no user controls, testers found it simple to use and a very smooth breather in the swimming position, although the odd positioning of the purge did give some fits until they got the hang of it. Because bubbles exit just one side (directed away from the eyes), some were annoyed by turbulence on the left side of the face.

BOTTOM LINE: The cutting edge Instinct 12S is a streamlined and efficient breather — and a good buy for the money.

BREATHING SIMULATOR PERFORMANCE: Good to Very Good | REAL-WORLD PERFORMANCE: Fair to Very Good

10. OCEANIC ALPHA 9/SP5

FEATURES: Take a basic first stage with an established reliability record, couple it with a lightweight, new-generation second stage, and you’ve got the Alpha 9/SP5. There are no adjustment knobs: Simply put it in your mouth and breathe. The reg comes with a full-cover purge and a first-rate multicompound mouthpiece.

PERFORMANCE: Teamed with the SP5 first stage, the Alpha 9 is designed for everyday recreational diving, and the ANSTI machine results reflect this. It delivered Very Good work of breathing at the test level that most closely represents recreational diving, and solid work of breathing at the other standard test levels. In real-world conditions, it breathed relatively dry and with minimal inhalation effort in the swimming position, although it can be a tad damp in the head-down position. Test divers thought the full-cover purge was a bit stiff, but the dual-compound mouthpiece — usually found only on up-market regs — was tough to beat.

BOTTOM LINE: The Alpha 9/SP5 is a good-performing economy reg geared to basic recreational diving and available at a great price.

BREATHING SIMULATOR PERFORMANCE: Good to Very Good | REAL-WORLD PERFORMANCE: Good to Very Good

11. SCUBAMAX RG-600

FEATURES: With an attractive polished-chrome body with a five LP port swivel turret, the first stage on the RG-600 looks very familiar to SCUBAPRO’s powerhouse, the MK25. The more typical-looking second stage has an extra-wide exhaust tee for bubble dispersal and an efficient breathing- resistance knob with generous adjustment.

PERFORMANCE: Alternating Very Good and Good ratings across the standard test spectrum, the RG-600 delivered the kind of breathing-machine performance expected from a reg at this price point. The same was found in ocean tests. It proved to be an easy breather, especially in the swimming position; however, it was quite a wet breather in the head-down position. And some div- ers found the mouthpiece too small for comfort.

BOTTOM LINE: While the fundamentals seem to be in place, diving the RG-600 suggests there are still a few issues that need to be worked out with the second stage. And it’s the only reg in this group not recommended for use with nitrox But overall, the RG-600 delivered respectable breathing.

BREATHING SIMULATOR PERFORMANCE: Good to Very Good | REAL-WORLD PERFORMANCE: Fair to Very Good

12. SCUBAPRO MK11/C200

FEATURES: The MK11/C200 comes with a forged brass first stage that’s chromed and fitted with a white elastomer shell. Identical HP and LP ports on each side of the body enable it to be used in either the up or down position with the same layout. One LP port on each side is high flow, delivering about 15 percent more air. The compact C200 second stage features a VIVA dive/predive switch and SCUBAPRO’s signature mouthpiece.

PERFORMANCE: The MK11/C200 turned in perfect work of breathing scores in the standard breathing-machine tests and produced some of the best muscle reg performance in the group. However, this impressive lab performance didn’t translate to the real-world test. Divers found it harder to breathe while looking up than the other regs in the group (allowing for the fact that all regs breathe harder when you’re looking toward the surface). They did like the flexibility and action of the purge cover.

BOTTOM LINE: Althought our team of testers didn’t warm to this reg, it delivered Excellent work of breathing and superior reserve capacity, and offers a nice set of standard features for the price.

BREATHING SIMULATOR PERFORMANCE: Excellent-PLUS | REAL-WORLD PERFORMANCE: Fair to Very Good

13. TUSA RS790

FEATURES: With its dry ambient pressure chamber, the R700 first stage is designed for cold-water use. It offers a pair of HP ports and four LP ports, two of which are high flow, delivering an increase in air of about 15 percent. The S90 second stage has a venturi lever for surface detuning, a large flexible purge cover and a comfortable mouthpiece.

PERFORMANCE: This reg looks similar to one formerly offered by SCUBAPRO. These suspicions were strengthened after seeing the RS790’s breathing-machine performance. It aced the stan- dard tests and then continued into the muscle reg realm, where it racked up some of the best performance in this shoot-out. Test divers rated it a very easy breather, albeit a bit damp in certain positions. They even liked the mouthpiece. The only ding was the venturi switch. While well marked and effective, divers found it hard to grab onto and turn.

BOTTOM LINE: The RS790 shows well, both on a breathing machine and in the diver’s mouth. A good all-around performer, it came in a close second as a test-diver favorite in this price category.

BREATHING SIMULATOR PERFORMANCE: Excellent-PLUS | REAL-WORLD PERFORMANCE: Good to Very Good

ScubaLab tests more equipment and collects more data than anybody in diving, and the annual regulator evaluation is our test team’s favorite. From a data-gathering perspective, a reg’s complex design allows us to really peel back the performance layers — using both sophisticated lab machinery as well as down-and-dirty dive work. This year, nine brands sent 13 new or redesigned models to be tested.

OVER $500

1. AQUA LUNG LEGEND LUX

FEATURES: the new-generation Legend Lux is a head-turner, with its gold accents and sculpted gold port plugs. The second stage is smaller and lighter than earlier versions, and it is equipped with Aqua Lung’s new Master Breathing system knob that both controls the direction of air and adjusts breathing effort.

PERFORMANCE: On the breathing machine, the Lux outpaced other models in its price category, racking up perfect scores. Up-shifting into muscle mode, it easily handled the extreme bonus breathing rate while reaching the deepest depth in its price category. The Lux really shined in ocean tests, turning in above-average scores in all ergo categories. Divers found the reg to be an effortless breather in all positions, dry and easy to purge. The Comfo-bite mouthpiece was a favorite.

BOTTOM LINE: Aqua Lung hyped this reg when it first hit the market, but we have to admit, it does not disappoint. For sheer breathing performance, reserve capacity and comfort in the water, the Legend Lux was this year’s undisputed Testers’ Choice in this price category.

TESTERS’ CHOICE

BREATHING SIMULATOR PERFORMANCE: Excellent-PLUS | REAL-WORLD PERFORMANCE: Very Good

2. AQUA LUNG LEGEND

FEATURES: Compared with the Lux, the Legend is plain-Jane with a typical polished chrome over brass first stage, and a second stage that eschews color accents and uses a standard venturi switch.

PERFORMANCE: Although the Legend isn’t as exciting to look at as the Lux, when it comes to performance, it's no shrinking violet. It was virtually identical to its costlier cousin on the breathing machine, and although it couldn’t go quite as deep when subjected to extremely high breathing rates, it got pretty darn close. Rated “one of the nicest breathers of the group,” it was able to match the ocean performance of the more expensive Lux, except when it came to the mouthpiece. While the standard version was deemed “OK,” testers preferred the Comfo-bite that was used on the Lux.

BOTTOM LINE: With the exception of the first- stage coating, color accents and second-stage user controls, the Legend is basically the same reg as the Lux. This is especially true when it comes to performance, which is top drawer. Match that to its price, and you’ve got a Best Buy.

BREATHING SIMULATOR PERFORMANCE: Excellent-PLUS | REAL-WORLD PERFORMANCE: Good to Very Good

3. BEUCHAT VR200/ICEBERG

FEATURES: With a new U.S. distribution deal, Beuchat is reappearing in more dive stores. This is great news for gear heads. Case in point: the VR200/Iceberg. Designed for diving in temperate to super-cold waters, the first stage is built rugged, and the second stage is made of metal with blue thermoplastic accents.

PERFORMANCE: A solid performer in the lab, the Iceberg’s work of breathing at the test level most closely representing recreational diving was rated Excellent. As depths and breathing rates increased, the Iceberg soldiered on, well into muscle reg territory. Skeptical test divers quickly turned into fans, giving it Very Good scores in every ergo test category. User controls are efficient and easy to handle, especially the knurled breathing resistance knob.

BOTTOM LINE: The Iceberg earned the second- highest number of tester “favorite” points. It’s a solid performer — and sharp looking to boot. One nitpick: The placement of its first-stage ports limits space between LP hose and HP port, which can make for a tight fit for a hoseless DC transmitter.

BREATHING SIMULATOR PERFORMANCE: Very Good to Excellent- PLUS | REAL-WORLD PERFORMANCE: Very Good

4. MARES ABYSS 52

FEATURES: The Abyss 52 combines a sleek, mostly metal second stage with a very compact first stage offering a pair of high-flow Dynamic Flow Control ports for hooking up second stages and octos. The first stage also offers a bonus for divers who use hoseless air integrated computers, with plenty of room to get a standard wrench in to tighten those annoyingly narrow nuts found on most transmitters. The well-shaped second stage has a center purge button but no user controls.

PERFORMANCE: The Abyss 52 is a workhorse where it counts. On the breathing machine, it delivered a consistent flow of air and an above-average work of breathing at each of the standard test levels. Test divers rated the Abyss better than average in the swimming position and thought its easy-press purge cleared water quickly without blasting throats, but some found the reg to be a rather noisy breather.

BOTTOM LINE: For divers who want a very capable breather that’s friendly to cold water and hoseless DC transmitters, the Abyss 52 is made to order.

BREATHING SIMULATOR PERFORMANCE: Good to Very Good | REAL-WORLD PERFORMANCE: Good to Very Good

5. MARES CARBON 52

FEATURES: Sharing the same MR52 first stage as the Abyss, the Carbon’s claim to fame is its 100 percent carbon construction. The casing is very light and very strong with good thermal conductivity for cold water. It has no user controls, instead using a specially shaped deflector with an air bypass tube to direct air for easy breathing regardless of depth.

PERFORMANCE: Compared with the Abyss, the Carbon’s mouthpiece sits farther from the face, and testers thought it felt bulky in the mouth. Because the exhaust tee reaches farther beneath the mouthpiece, it rubbed uncomfortably against some testers’ chins. That aside, the reg performed in line with the Abyss in the water. On the breathing machine, however, it was able to crank out better work of breathing. Where the Abyss scored Very Good, the Carbon scored Excellent; where the Abyss scored Good, the Carbon scored Very Good.

BOTTOM LINE: Dubbed the “Darth Vader” reg by test divers for its cool carbon look, this high-end breather feels a little different in the mouth, something that will require a period of adjustment. But overall performance is on point.

BREATHING SIMULATOR PERFORMANCE: Very Good to Excellent | REAL-WORLD PERFORMANCE: Good to Very Good

UNDER $500

6. AERIS Ion LT/AT600

FEATURES: One of the lightest models in this year’s shoot-out, Aeris’ flagship reg is a pocket-size breather designed for the traveling diver. The second stage offers both a dive/predive switch and a pneumatically balanced valve that maintains preferred breathing resistance throughout the dive. Set it once; from then on it will automatically adjust to deliver a consistent flow of air regardless of depth.

PERFORMANCE: For such a small reg, the Ion LT delivers quite a punch. It turned in stellar breathing-machine performance across Scubalab’s standard test levels. In ocean tests, divers loved this reg. It breathed dry and easy in all positions, and the full-cover purge got the job done. The dive/predive switch was small and unmarked, so finding the proper position was confusing. The multicompound mouthpiece was rated the undisputed favorite in this year’s roundup.

BOTTOM LINE: With some of the best scores on the machine and in the water, plus the top of testers’ favorites lists, the Ion LT/AT600 earned the Testers’ Choice in the under $500 category.

TESTERS’ CHOICE

BREATHING SIMULATOR PERFORMANCE: Very Good to Excellent | REAL-WORLD PERFORMANCE: Good to Very Good

7. BEUCHAT VRT80/EVOLUTION

FEATURES: The VRT80/Evolution — or Evo — is designed for both temperate and cold water. A compact first stage with only one HP port is mated to a no-frills second stage armed with a venturi switch designed to regulate free-flows.

PERFORMANCE: On the breathing machine, the Evo cranked out Excellent work of breathing at the test level most closely representing recreational diving, and very good work of breathing everywhere else. When pushed into the realm of muscle regs, the Evo was able to handle extreme breathing rates and deep depths with the best of them — regardless of price. This near-effortless display continued into the ocean tests, impressing test divers with easy breathing in all positions. Some complained the mouthpiece was too small; others felt it was comfy but could use larger bite tabs.

BOTTOM LINE: the Evo replaces flash with down-and-dirty breathing performance, offering solid real-world functionality along with more reserve capacity than models costing twice as much, earning the Best Buy nod for this price category.

BREATHING SIMULATOR PERFORMANCE: Very Good to Excellent | PLUS REAL-WORLD PERFORMANCE: Good to Very Good

8. IST SPORTS R860

FEATURES: IST Sports’ flagship R860 is all business. One of the heaviest regs in this group, the balanced-diaphragm first stage is equipped with an environmental kit for diving cold or brackish water. The second stage is a bit larger in diameter than average, with two user controls: the dive/predive lever detunes the reg to minimize free-flows, and the breathing-resistance knob regulates airflow with increasing depth.

PERFORMANCE: The breathing machine proved that the R860 can deliver air efficiently. It turned in Excellent work of breathing at simulated recreational diving levels, and Good to Very Good work of breathing at the deeper depths and higher breathing rates. During ocean tests, the model proved to be a very good breather in the swimming position, a good breather in alternate positions, and a pretty dry breather in all positions but head-down.

BOTTOM LINE: Overall, the R860 is a solid midpack performer. Test divers were split on the comfort of the mouthpiece but otherwise felt the reg was a respectable rec-level breather.

BREATHING SIMULATOR PERFORMANCE: Good to Excellent | REAL-WORLD PERFORMANCE: Good to Very Good

9. MARES INSTINCT 12S

FEATURES: The Instinct combines a tried-and- true first stage with a new-age second stage. The 12S first stage has a long-standing reputation for reliability. The Instinct second stage is quite attractive, offering an interesting hydrodynamic shape and a purge button on top of the casing, so there’s no exhaust tee. Instead, bubbles exit the casing through a small circular orifice.

PERFORMANCE: On the breathing machine, the Instinct turned in respectable work of breathing, with its best behavior found at the test level most closely representing recreational diving. With no user controls, testers found it simple to use and a very smooth breather in the swimming position, although the odd positioning of the purge did give some fits until they got the hang of it. Because bubbles exit just one side (directed away from the eyes), some were annoyed by turbulence on the left side of the face.

BOTTOM LINE: The cutting edge Instinct 12S is a streamlined and efficient breather — and a good buy for the money.

BREATHING SIMULATOR PERFORMANCE: Good to Very Good | REAL-WORLD PERFORMANCE: Fair to Very Good

10. OCEANIC ALPHA 9/SP5

FEATURES: Take a basic first stage with an established reliability record, couple it with a lightweight, new-generation second stage, and you’ve got the Alpha 9/SP5. There are no adjustment knobs: Simply put it in your mouth and breathe. The reg comes with a full-cover purge and a first-rate multicompound mouthpiece.

PERFORMANCE: Teamed with the SP5 first stage, the Alpha 9 is designed for everyday recreational diving, and the ANSTI machine results reflect this. It delivered Very Good work of breathing at the test level that most closely represents recreational diving, and solid work of breathing at the other standard test levels. In real-world conditions, it breathed relatively dry and with minimal inhalation effort in the swimming position, although it can be a tad damp in the head-down position. Test divers thought the full-cover purge was a bit stiff, but the dual-compound mouthpiece — usually found only on up-market regs — was tough to beat.

BOTTOM LINE: The Alpha 9/SP5 is a good-performing economy reg geared to basic recreational diving and available at a great price.

BREATHING SIMULATOR PERFORMANCE: Good to Very Good | REAL-WORLD PERFORMANCE: Good to Very Good

11. SCUBAMAX RG-600

FEATURES: With an attractive polished-chrome body with a five LP port swivel turret, the first stage on the RG-600 looks very familiar to SCUBAPRO’s powerhouse, the MK25. The more typical-looking second stage has an extra-wide exhaust tee for bubble dispersal and an efficient breathing- resistance knob with generous adjustment.

PERFORMANCE: Alternating Very Good and Good ratings across the standard test spectrum, the RG-600 delivered the kind of breathing-machine performance expected from a reg at this price point. The same was found in ocean tests. It proved to be an easy breather, especially in the swimming position; however, it was quite a wet breather in the head-down position. And some div- ers found the mouthpiece too small for comfort.

BOTTOM LINE: While the fundamentals seem to be in place, diving the RG-600 suggests there are still a few issues that need to be worked out with the second stage. And it’s the only reg in this group not recommended for use with nitrox But overall, the RG-600 delivered respectable breathing.

BREATHING SIMULATOR PERFORMANCE: Good to Very Good | REAL-WORLD PERFORMANCE: Fair to Very Good

12. SCUBAPRO MK11/C200

FEATURES: The MK11/C200 comes with a forged brass first stage that’s chromed and fitted with a white elastomer shell. Identical HP and LP ports on each side of the body enable it to be used in either the up or down position with the same layout. One LP port on each side is high flow, delivering about 15 percent more air. The compact C200 second stage features a VIVA dive/predive switch and SCUBAPRO’s signature mouthpiece.

PERFORMANCE: The MK11/C200 turned in perfect work of breathing scores in the standard breathing-machine tests and produced some of the best muscle reg performance in the group. However, this impressive lab performance didn’t translate to the real-world test. Divers found it harder to breathe while looking up than the other regs in the group (allowing for the fact that all regs breathe harder when you’re looking toward the surface). They did like the flexibility and action of the purge cover.

BOTTOM LINE: Althought our team of testers didn’t warm to this reg, it delivered Excellent work of breathing and superior reserve capacity, and offers a nice set of standard features for the price.

BREATHING SIMULATOR PERFORMANCE: Excellent-PLUS | REAL-WORLD PERFORMANCE: Fair to Very Good

13. TUSA RS790

FEATURES: With its dry ambient pressure chamber, the R700 first stage is designed for cold-water use. It offers a pair of HP ports and four LP ports, two of which are high flow, delivering an increase in air of about 15 percent. The S90 second stage has a venturi lever for surface detuning, a large flexible purge cover and a comfortable mouthpiece.

PERFORMANCE: This reg looks similar to one formerly offered by SCUBAPRO. These suspicions were strengthened after seeing the RS790’s breathing-machine performance. It aced the stan- dard tests and then continued into the muscle reg realm, where it racked up some of the best performance in this shoot-out. Test divers rated it a very easy breather, albeit a bit damp in certain positions. They even liked the mouthpiece. The only ding was the venturi switch. While well marked and effective, divers found it hard to grab onto and turn.

BOTTOM LINE: The RS790 shows well, both on a breathing machine and in the diver’s mouth. A good all-around performer, it came in a close second as a test-diver favorite in this price category.

BREATHING SIMULATOR PERFORMANCE: Excellent-PLUS | REAL-WORLD PERFORMANCE: Good to Very Good

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Breathe Easy: ScubaLab Tests 13 New Dive Regulators

Breathe Easy: ScubaLab Tests 13 New Dive Regulators

OVER $500

UNDER $500

OVER $500

UNDER $500

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Breathe Easy: ScubaLab Tests 13 New Dive Regulators

Breathe Easy: ScubaLab Tests 13 New Dive Regulators

OVER $500

UNDER $500

OVER $500

UNDER $500

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