Margules U-280 SC 30 Manual Del Usuario página 21

INSTALLATION
Carefully take the amplifier out of its box and
remove the packaging material as indicated.
Consider that the amplifier has a significant
weight.
Once you have removed
materials, place the amplifier on a solid surface,
able to resist the weight of the unit and far from
flammable materials.
Remove the tube protection
unscrewing the knobs at the top of each cage. It
is important to ensure the tube protection and
the plastic material covering the cupper plate is
removed before you turn on the amplifier.
Make sure you remove all the protective material
that covers the tubes and that they are installed
properly. Verify there are no residues of the
packaging or protection material before turning
on the amplifier.
The U-280 SC 30 TH Anniversary amplifier must
be installed on a solid and leveled surface that
prevents vibrations and allows an optimal
ventilation to dissipate the heat generated by
the operation of the equipment.
Never install the amplifier outdoors. Do not
expose it to rainfall or direct sunrays.
Make sure that the AC supply voltage is no more
than +/- 10% of stated AC voltage.
The equipment can
continuously; however, turn it off when not in
use in order to prevent premature wearing. If the
amplifier is to remain turned off for long periods
of time, it is recommended to unplug it from the
electrical outlet.
CAUTION: There is HIGH VOLTAGE inside the
amplifier. Never open the amplifier since you
could be exposed to a potentially lethal voltage
and it could void the warranty of the equipment.
CONNECTIONS AND OPERATION
Before you connect the amplifier to the AC
power source, the signal sources and the
speakers must be connected to the terminals on
the amplifier.
The RCA line level inputs on the U-280 SC 30
Anniversary amplifier are unbalanced and made
of gold-plated copper to prevent corrosion and
improve conductivity, so you should avoid
forcing them.
the packaging
cages by
remain turned on
TH
The speakers' connectors or binding posts are
made of pure machined copper, so you should
not use any tool to force them. Being a soft
highly conductive metal, copper provides
adequate contact when lightly tightened.
These are 5-way type connectors so they may be
used with bare wire, banana plugs, spade
connectors, pin connectors or ring terminals.
We recommend the use of high-quality fully
shielded interconnect cables to avoid any noise
that may interfere with music reproduction.
Always connect the interconnect cables of the
preamplifier respecting the following order:
White for left channel and Red for right channel,
since inverting them prevents the generation of
a realistic soundstage. In the same way, always
connect the speakers
corresponding channels, avoid short-circuits
and, most of all, verify there are no open circuits.
Make sure the speakers' cables make correct
contact with the terminals on the amplifier and,
considering the nominal impedance of your
speakers, use the 4 or 8 Ohms terminals.
The main switch is located at the back of the
amplifier and switching it on is necessary to
operate the equipment.
When you turn on the amplifier, both the
Margules logo and the bottom part of the dials
will light up. The amplifier has an internal clock
that delays approximately
powering up into operation mode. This pre-
heating time allows the formation of an electron
cloud in the (large) power tubes, which extends
their useful life. You will know the equipment is
in operation mode when the power tube LED
indicators light up. These LED lights also work
as emission indicators for the tubes, so when a
tube has low emissions or does not work
properly, the LED light turns out or dimer
indicating that the tube must be replaced.
Verify that the Mono / Stereo selector is in the
"Stereo" position (use the "Mono" position to
set the unit as monoblock).
When used on mono, any input and output
connector can be used, we recommend to be
coherent to the channel used, for example, if is
going to be the left channel, use both left
channels, in mono the two channels are strap in
parallel.
If the U280 is use in mono, the output impedance
and triode/ultralinear should be the same in both
channels.
respecting the
3 minutes its
ENGLISH - 21