Ashly FET-500 Gebruiksaanwijzing - Pagina 4
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ELECTRONIC
Both amplifiers are fully complementary, push-pull type with totally discreet,
high voltage,
wide bandwidth electronics.
This approach inherently
assures
low
noise,
low
distortion,
and excellent transient response.
Inputs
are
bringing, active balanced (transformerless), equipped with both 1/4" jacks and
XLii-type
connectors
of both sexes to facilitate linking
several
amplifiers
together.
All
input
connections
can,
however,
operate
as
balanced
or
unbalanced.
This is determined by the connector used in conjunction with the
input.
Stereo,
mono and bridging modes are user selectable by means of rear
panel switches, requiring no internal modifications or additional components.
All electronic components are conservatively rated and are mounted on a rugged
glass-epoxy circuit board.
An efficient U-I laminated power transformer saves
space
and
minimizes
magnetic
flux
leakage,
permitting
other
low-level
equipment to be mounted above or below the amplifier with no danger of induced
hum.
Large value, computer grade electrolytic capacitors assure long service.
Two
lU-segment,
27
dB
range LED meter displays provide
an
easily
viewed
indication of power levels, and a separate LED indicates thermal overload.
HECiL\NICAL
ihe Ashly MOb-EST power amplifiers are packaged in a rugged,
one-piece welded
16
gauge
steel chassis with an anodized aluminum front panel and
an
easily
removed
steel
top
cover.
The
chassis and
ail
internal
components
are
integrated
into a single,
rigid unit.
The FET-500 requires 5 1/4" of
rack
space and ttie FET-200 requires only 3 1/2".
The power transformer is located
near
the front of each amplifier,
reducing mechanical stress on the chassis.
Each channel's electronics and heat sink are combined into a compact,
plug in
module which can be removed from the amplifier in seconds.
Hard wiring is at
an absolute minimum.
Large
heat
sinks
and an aerodynamic internal design permit the
use
of
an
ultra-quiet,
slow
speed
fan
which
pulls air in through
the
front
panel
directly across the heat sinks and power transformer, and out through the rear
panel.
It
is unnecessary to provide space or ventilation above or below the
amplifier, allowing for economical use of rack space.
The
amplifier's output connectors are conveniently arranged on standard
3/4"
spacing tor quick interconnect via banana plugs, delecting the bridging output
involves only moving the banana plug to the two center (RED) connectors.
Both
the
AC
line
and the speaker terminals are fused protected.
Fuses
can
be
removed instantly without tools.
There are no internal fuses.
IN USE
The result:
better sounding amplifiers, remarkably un—fussy about how you use
them.
They
will
tolerate
low impedance,
highly reactive loads
and
hot,
crowded
racks.
They
are highly immune to RF interference and
will
not
be
damaged
by intermittent short circuits—sustained shorts will simply blow the
output fuse.
Due to their balanced circuit design,
the use of delay circuits
and
output relays are unnecessary.
There is no turn-on thump and the
volume
controls can remain up when power is applied and removed.
Both amps will keep
on running right through a brown-out,
even when line voltages fall to as
low
as 20 volts!
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