ALLNIC AUDIO L-4000 Owner's Manual - Page 6

Browse online or download pdf Owner's Manual for Amplifier ALLNIC AUDIO L-4000. ALLNIC AUDIO L-4000 12 pages. Line stage preamplifier

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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.

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.

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.

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.

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