Ashly FET-I500C Stereo Amplifier User Manual


 
PowerAmplifiers
model FET-I500M
model FET-I500C
FET.1sOOM
FET-1500C
shly, the
first
professional
audio
manufacturer
to
release
a
MOS-FET
power
amplifier,
is
proud
to
introduce the next
generation,
the
FET-I500
Series.
During its first
decade, our original
FET
Series
became
a standard
for
applications
requiring
the
utmost in sonic
excellence
and extreme
reliability. We
now improve upon that
reputation
by
offering more models
with
better specifi-
cations than
ever before.
The FET-1500
series
is offered in
two
variations:
The FET-1500M features LED meters
and balanced
XLR or 1/4"
inputs.
This
design
is intended for demanding sound
reinforcement, broadcast facilities, re-
cording studios,
or any application
where
visual monitoring
and
interfacing with bal-
anced equipment
is essential.
The FET-1500G is
designed to
meet
the
needs of
professional
industrial installa-
tions
such as theater,
public
address and
stadium
use. In these situations
meters
and
XLR inputs are
not
typically
required,
so the
FET-1500C is supplied
without
meters and utilizes barrier strip and
1/4"
inputs.
This
amplifier
provides
all of the
same
performance
benefits as the
FET-1500M at a
lower
cost.
The FET-1500 series
represents Ashly's
ongoing dedication
to extending the
boundaries
of technology. Simple, stable
circuitry
produces
better sound.
Ashly
MOS-FET
amplifiers
use a complemen-
tary, all-discrete design.
The
driver
is
pure
class-A and, because
it has only two
stages,
requires little
compensation
allow-
ing both speed and
linearity with no
crossover-notch distortion.
The
output stage consists
of
paralleled
power
MOS-FETs for current
gain.
The
MOS-FETs have smooth transconduc-
tance curves and
run
at a
relatively high
idle current, again
preventing
crossover
notch
distortion.
They
require
no dissipa-
tion-limiting
protective
circuitry and
pro-
vide virtually infinite
power gain,
keeping
load reflections from the driver stage.
This
promotes
stability and
low
distortion
when
driving
reactive loads
like loud-
speakers.
Special attention
is
paid
to overload
performance;
when an Ashly amp
is
over-
driven,
it will
clip cleanly
with a slightly
rounded edge totally
free from
spikes
and
glitches.
Total immunity
to
power
supply
variations insures that transient distor-
tions are
never
generated
on
program
material with wide dynamic
range.
The result:
powerful
and
quick
ampli-
fiers that deliver unrestrained, uncolored
sound
quality
with remarkable
accuracy.
Each Ashly
power
amplifier,
like
all
Ashly
products,
is
now fully
covered by
our
exclusive
five-year
worry-free warranty.