Owner's Manual
Table Of Contents
INPUT
SECTION
The M4300's input section allows you to send
signal to the amplifier section through the use
of
either two or four differential-balanced inputs.
Input connections are via traditional
RCA-type jacks.
CH
I
(left)
CH
3 (Left)
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If
you wish to send four discrete channels into
the M4300, simply use all four inputs (channels
1 & 2
and
channels 3 &
4)
and set the "CH 3&4
Input
From" switch to "Discrete".
If
you wish to feed all four channels by using
only two channels
of
input, set the
"CH
3&4
Input
From" switch to "1&2"
and
use only the
inputs to channels 1
&
2.
Input Voltage Range:
A wide range ofsignal input voltages can be
accommodated by the M4300's input sections
(200mV - SV). This wide range
is
split up into
two sub-ranges, accessible via a switch located to
the left
of
the Input Connectors.
Be
aware that the
position ofthis switch will dictate the sensitivity
range for all four input channels.
The "Low" position on the
"Input
Voltage"
switch selects an input sensitivity range between
200mV and
2Y.
This means that the
"Input
Sens." rotary control will operate within that
voltage window. Ifyou are using a source unit
with conventional preamp-level outputs, this
is
most likely the position that you will use.
The "High" position on the
"Input
Voltage"
switch selects an input sensitivity range between
SOOmV
and
Sy' This
is
useful for certain high-
output preamp
level
signals
as
well as speaker-
level outputs from source units not equipped with
preamp-level outputs.
6
To
use speaker-level sources, splice the speaker
output wires ofthe source unit onto a pair of
RCA
plugs for each input channel pair. No line output
converter
is
needed in most cases.
DIMPORTANTI
The
output
of
the
amplifier
will decrease for
a given
input
voltage when
the
"Input
Range"
switch is placed
in
the
"High"
position.
Conversely,
the
output
will be
higher
with
the
switch
in
the
"Low" position.
While
this
may
sound
counter-intuitive,
it
is consistent
with
the
descriptions
in
this
section.
INPUT SENSITIVITY
CONTROLS
Once the appropriate
"Input
Voltage" range
has been selected, the controls labeled
"Input
Sens." located in each
"Channel
Controls"
section can be used to match the source unit's
output voltage to the input stage
of
each pair
of
amplifier channels for
maximum
clean output.
Rotating the control clockwise will result in
higher sensitivity (louder for a given input
voltage). Rotating the control counter-clockwise
will result in lower sensitivity (quieter for a given
input voltage.)
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atus
Channell
&:
2 Controls Filter Freq. (Hz) Channel
3&
80
)
Input Sens.
'lite,
Mod,
6.'0
Input
Sens.
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((E)
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(H3&4
Pre-Outs
CH3&4inp
I.to"'j
Input
From
Input
From
signalsaresurT •
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tomonowh
the
Bass
Boc
switchisint
Off I
On
1&2 I
Oiwete
1&21Sum
on
positiof
~ort
To
properly set the amplifier for
maximum
clean output, please refer to Appendix A (page
14)
in this manual. After using this procedure,
you can then adjust any or all
"Input
Sens."
levels downward
if
this
is
required to achieve the
desired system balance.
cJL
AUDIO
M4300