6
particularly for those who may want to place the L-
4000 on some kind of after-market isolation feet
or similar devices. Dropping one side of the L-4000,
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-
4000 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-4000 away from major
sources of RFI and EMI; though well shielded, the L-
4000 will function best away from large power
transformers and other sources of such
interference.
B.
POWER CONNECTION
The L-4000 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 left side 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-4000 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 is intended especially for connection to any
particular device.
NO PHONO STAGE - The L-4000 is a line stage
preamplifier and does NOT have a built in phono
preamplifier section. You will need a phono preamplifier
if you want to use a turntable with the L-4000. You can
connect your phono preamplifier to any of the five
inputs, provided you have the appropriate types of
connections or adaptors.
The L-4000 has been designed and manufactured to work
most synergistically with Allnic Audio phono
preamplifiers, pre-preamplifiers and equalization
products.
D.
OUTPUTS
The L-4000 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-4000’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-
4000 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
2). 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
On the right hand side of the top deck of the chassis,
there is a phase switch. This switch is a 180 degree phase