ALLNIC AUDIO L?1500, Руководство пользователя

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L ‐ 1500, or the whole unit, is not a good thing to
do.
•
DO NOT place the unit near a strong light or heat
source.
•
DO NOT place anything heavy on the unit.
•
DO NOT allow rubber or vinyl materials to rest on
the unit’s chassis for long periods of time. This
could discolour the metal.
•
DO place the unit on a shelf or stand that is stable
and not subject to vibration or sudden shock.
•
DO consider using a high quality power cord and
inter ‐ connects, both inputs and outputs. The L ‐
1500 is a highly sensitive piece of electronic
equipment designed for neutrality and will output
what you put into it.
•
DO try to place the L ‐ 1500 away from major
sources of RFI and EMI; though well shielded, the L ‐
1500 will function best away from large power
transformers and other sources of such
interference.
B. POWER CONNECTION
The L ‐ 1500 uses a standard three prong male IEC
connection for AC input. You need to use a power cord with
a female three prong IEC connector at one end.
To the left of the IEC connector (facing the back of the unit
as in Figure 1), there is a power on ‐ off switch. Leave this
switch in the OFF position – that means the switch is
pressed “down” at the bottom ‐ while you make all initial
connections.
The L ‐ 1500 you have purchased is set internally for AC
110/120 volt – 60 HZ operation. There is no way to change
this to another AC setting without return of the unit to the
factory for re ‐ wiring, at the owner’s cost, including
transport both directions.
C. INPUTS
There are five (5) inputs. Line 1 and Line 2 are balanced
connections (XLR type connectors). The remaining 3 line
inputs are RCA type single ‐ ended connections. None of the
inputs is intended especially for connection to any
particular device.
NO PHONO STAGE ‐ The L ‐ 1500 is a line stage
preamplifier and does NOT have a built in phono pre ‐
amplifier section. You will need a phono pre ‐ amplifier if
you want to use a turntable with the L ‐ 1500. You can
connect your phono pre ‐ amplifier to any of the five
inputs, provided you have the appropriate types of
connections or adaptors.
The L ‐ 1500 has been designed and manufactured to work
most synergistically with Allnic Audio phono
preamplifiers, pre ‐ preamplifiers and equalization
products.
D. OUTPUTS
The L ‐ 1500 is equipped with three pairs of outputs. Two
(2) of the outputs require balanced connectors (XLR
type); one (1) pair is unbalanced, using RCA type
connectors.
One of the pairs of balanced outputs is a “Record Out”. It
is a straight pass ‐ through, is not affected by the L ‐ 1500’s
circuitry, and provides no gain.
The other two pairs of outputs are intended for
connection to a power amplifier. On the back of the L ‐
1500 there is a switch to select either balanced or single ‐
ended RCA connection to your amplifier. The output
selection switch is just below the Phase switch (see Figure
1). Please set the output selection switch to the type of
output connection you are using. If you set the switch to
“balanced” and then connect your cables to the RCA
connections, audible hum will be introduced.
You may use both the balanced and single ‐ ended RCA
outputs at the same time, for example, if you run one
pair to your stereo amplifier and the other to a (or a pair
of) powered subwoofer(s). In such a case, set the output
selection switch to unbalanced (RCA). This will avoid the
introduction of hum.
E. PHASE SWITCH
Above the output selection switch, there is a phase
switch. This switch is a 180 degree phase switch; phase is
either normal or inverted one hundred percent,
depending on the switch position. On initial connection,
set the switch to normal. Depending on the phase your
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