Alesis M1 ACTIVE - Page 12

About
the
Ml
Actlye
Inside
your
new
speaker
lf
you're
in
a hurry
to
get
started,
skip
ahead
to
Chapter 2,
"Speaker
Installation',
for
connection
and
placement
tips,
About
powered
monitons
The
M1 Actives
combine
a speaker
and amplifiers
in
the same
compact
cabinet.
Powered-monitors
are growing
in popularity
over the traditional
siparate amplifier
and
speakers for
a number
of reasons,
convenience
and ease
of hookup
beingbnly
one
of them. You
can
cormect a powered
speaker directly
to
any line-level
source
(normally,
the control
room
output
of a mixer)
simply
by connecting
a patch
cord.
Another
benefit is
improved
sound
quality. With
carefirl design,
$e
speaker,
arnplifier
and electronic
crossover
can be optimised
for each
otherl The
ML Actives
arebiamplified,meaning
that low frequencies
and high
frequencies
are handled
not
only
by separate
speakers
(the
tweeter and
the woofer),
but by
separate amplifiers.
A
pair
of Ml Actives
contain a total
of four power
arnplifiers.
Because
of the increased
efficiency
of biampMication,
these are
much louder
than a single-channel
power
amplifier
of the same
wattage feeding
a passive
crossover, as
in other designs.
New
teclurology makes
it possible
to
make these high-wattage
amplifiers
small enough
to
fit inside
the speaker
cabinet,
with very
little weight
or size
gain.
Since the
Ml Actives
are self-powered,
DO NOT
connect
them to
the
speaker
output of
another amplifier
(such
as
a
powered
mixer
or hi-fi
receiver).
Connect them
only to the line-level
outputs
of
such
devices
(+4
dBu
nominal, +24
dBu maximum).
Tone
Tonally,
every effort
has been
made to
emulate the accurate
studio
sound of Alesis,
Monitor
One but
with enhanced
low bass and high
frequency
extension.
The nominal
frequency
response
is 50Hz-20KHz
X2dB.
(See
Figure 1) Additionally,
the use
of
eleckonic
crossovers
within the critical
upper midrange
frequencies
has reduced
phase
and time delay
anomalies
often
associated with passive
crossovers.
By
including
discrete
woofer and tweeter
amplifiers
and application-specific
electronic
high and
low pass
crossover filters
in the
same enclosure
the tonal
accuracy of the
M1 Active
will always
remain
constant.
About
the
driverc
The M1
Active's 5.5"
woofer cone
is made
of
proprietary
non-woven
carbon fiber.
This material is
25% lighter
than polypropylene
with twice the
stiffness
for quicker
transient response
in
the low-to-midbass
region and
vastly improved
midrange
inteligibility (over
polypropylene
at 1500 Hz). The
non-woven
carbon fiber
cone,
along
with the closed
cell
synthetic
rubber surround,
are both
nearly impervious
to
lo
IFI
ACflUE
REFERrc
ilIAilUAL