Last year, the British magazine
Diver tested several regulators in
the mid-price ($300-$500) and
high-price (more than $500)
ranges and came up with some
interesting performance ratings,
including a real dark-horse surprise.
Diver's tests are known
for their lack of bias, which
means they aren't responsive
to advertisers. Teams of divers
performed in-water tests, but
more important the regulators
were then machine tested
for the effort needed to
crack open the valve and to
inhale and exhale. The ideal
profile involved as little total
breathing effort as possible.
The tests were conducted in
accordance with international
testing standards.
Among the top-of-the-line regulators,
Atomic M1 (around $700)
was clearly the first choice.
According to one test diver: "It felt
good to breathe from and the
purge was a delight to use. A great
design." In the bench tests, it wasn't
the easiest-breathing regulator,
but Diver reported: "After the initial
effort needed to open the
valve, very little more work was
needed during inhalation."
Close behind were the Apeks
ATX100 and ATX200 (Apeks is a
British make distributed in the
U.S. by Sea Quest). The Aqua
Lung Legend LX Supreme proved
the easiest-breathing in bench
tests, followed closely by the
Scubapro S600/MK25. The Mares
Abyss/MR22 also rated well
despite a large initial cracking pressure
to open the valve.
Not so highly regarded were the Dacor Viper Metal and the
Oceanic Omega II/DX4 (both
requiring more effort to breathe),
the Cressi-Sub Airtech ("I felt I had
to consciously draw in each
breath"), the Poseidon Xstream
Deep 90 ("The air came in quick
pulses and the purge blew out my
other end!").
... one regulator stood
out. When it came to a
leisure dive on the last
day, everyone wanted to
use the ... |
In the mid-price range, four
makes emerged as clear favorites:
the Apeks ATX 50 ("This is the
one I would choose to buy without
any hesitation whatsoever"), the
Aqua-lung Legend (easiest breathing
of the lot), the Tusa Platina RS
230 ("A lovely breathe, and great
performance") and the Mares V16
Epos ("A nice smooth suck -- a
Gucci among regulators.").
That quartet was closely followed
by the Oceanic Gamma 2
DX4 and Scubapro MK25 R380
models. Also-rans included the
Sherwood Blizzard (difficult
breathing at depth), the Dacor
Viper Tec (problems with exhaust
bubbles and purge button and
less-than smooth breathing performance),
the Cressi-Sub XS
("More of a Ford Fiesta than a
Ferrari"), the Poseidon Cyklon
5000 ("Too much air and too
much water") and other brands
not readily available in the U.S.
Diver had previously compared
bottom-of-the line regulators and
was "agreeably surprised to find
that nearly all the regulators tested
were capable of giving the air
needed by two divers at one time
at 40m-plus."
Favorites included the Mares
MR2 Axis, the Dacor Fury,
the Scubapro MK2/R190,
the Aqua Lung Calypso, and
the Ocean Reef Enterprise.
Nevertheless, one regulator
stood out. When it
came to a leisure dive on the
last day, everyone wanted to
use the Oceanic Alpha 7
SP4. Testers appreciated the
compact and light second
stage, and one called it "a
treat to breathe from."
Bench tests produced an
almost perfect breathing profile,
from cracking through inhalation
and exhalation.
The only drawback is that it's
not recommended for use in
cold water, like several regulators
in this category. But for other
uses, the Alpha 7 SP4, which
retails for $270, so impressed the
editors of Diver that when they
reported on high-priced regulators
a year later, they slipped the
modestly priced SP4 into the lineup
and wound up asking, "Need
you spend so much on a regulator
when the inexpensive
Oceanic Alpha 7 is so highly
thought of?"
If you're thinking of running
out and buying an Alpha 7,
remember that the tested model
was the SP4 with an unbalanced
piston first stage, not the more
expensive Alpha 7 CDX with a
balanced diaphragm first stage.