Carvin FET1000 Instruction Manual - Page 30

Connections, Amplifier

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FLT Series Power Amplifiers Connections to the Amplifier Section 4 Section 4 Connections to the Amplifier 'Input Connections A.C. Line Connector: The AC line voltage must match the line voltage selected at the rear of the unit (120 or 220 VAC at 50 or 60 Hz). A detachable 3 pin grounded AC line cord is standard equipment on all units shipped within the United States. The color code of the cord is as follows: Hot (Switched Leg) Neutral EARTH (Chassis Ground) Black White Green w/Yellow Tracer Balanced XLR Inputs: XLR inputs for each channel are provided on the rear panel of the amplifier. These are balanced differential inputs which will provide a very high degree a common mode noise rejection. If you use input cables that are longer than 30 feet it is recommended that you utilize balanced sends with the balanced inputs on your amp to obtain the best noise performance from your system. 1/4" Phone Jack Inputs: These inputs are "stereo phone plug" or "tip, ring, sleeve" type balanced inputs. They may be used as either balanced or single ended type inputs. If you wish to use them as a 1/4" balanced inputs then use a stereo 1/4" phone plug wired as follows: Tip Ring Sleeve Positive Balanced (XLR pin 2) Negative Balanced (XLR pin 3) Ground (XLR pin 1) Although the 1/4" inputs are balanced you can also use a standard (single ended, or "two wire") 1/4" phone plug with this input. Any shielded cable (a guitar cord for example) will work fine. Using a single ended input connection will tie pin 3 and pin 1 to ground. This leaves the 1/4" Tip (XLR pin 2) as the positive input signal connection. It is aliright to use the XLR input of one channel and the 1/4" input of the other channel. Note that the ground connection of the 1/4" input is not affected by the XLR Ground Lift feature in the accessory group. (see section 3) Input Connection Cable For input signal connections we recommend you use shielded type cable as shown in figure 4-1 below. SHIELDED CABLE Jacket Shield Insulation Wire Figure 4-1 Shielded Input Cable 4-1

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FLT
Series
Power
Amplifiers
Connections
to
the
Amplifier
Section
4
Section
4
Connections
to
the
Amplifier
'Input
Connections
A.C.
Line
Connector:
The
AC
line
voltage
must
match
the
line
voltage
selected
at
the
rear
of
the
unit
(120
or
220
VAC
at
50
or
60
Hz).
A
detachable
3
pin
grounded
AC
line
cord
is
standard
equipment
on
all
units
shipped
within
the
United
States.
The
color
code
of
the
cord
is
as
follows:
Hot
(Switched
Leg)
Black
Neutral
White
EARTH
(Chassis
Ground)
Green
w/Yellow
Tracer
Balanced
XLR
Inputs:
XLR
inputs
for
each
channel
are
provided
on
the
rear
panel
of
the
amplifier.
These
are
balanced
differential
inputs
which
will
provide
a
very
high
degree
a
common
mode
noise
rejection.
If
you
use
input
cables
that
are
longer
than
30
feet
it
is
recommended
that
you
utilize
balanced
sends
with
the
balanced
inputs
on
your
amp
to
obtain
the
best
noise
performance
from
your
system.
1/4"
Phone
Jack
Inputs:
These
inputs
are
"stereo
phone
plug"
or
"tip,
ring,
sleeve"
type
balanced
inputs.
They
may
be
used
as
either
balanced
or
single
ended
type
inputs.
If
you
wish
to
use
them
as
a
1/4"
balanced
inputs
then
use
a
stereo
1/4"
phone
plug
wired
as
follows:
Tip
Positive
Balanced
(XLR
pin
2)
Ring
Negative
Balanced
(XLR
pin
3)
Sleeve
Ground
(XLR
pin
1)
Although
the
1/4"
inputs
are
balanced
you
can
also
use
a
standard
(single
ended,
or
"two
wire")
1/4"
phone
plug
with
this
input.
Any
shielded
cable
(a
guitar
cord
for
example)
will
work
fine.
Using
a
single
ended
input
connection
will
tie
pin
3
and
pin
1
to
ground.
This
leaves
the
1/4"
Tip
(XLR
pin
2)
as
the
positive
input
signal
connection.
It
is
aliright
to
use
the
XLR
input
of
one
channel
and
the
1/4"
input
of
the
other
channel.
Note
that
the
ground
connection
of
the
1/4"
input
is
not
affected
by
the
XLR
Ground
Lift
feature
in
the
accessory
group.
(see
section
3)
Input
Connection
Cable
For
input
signal
connections
we
recommend
you
use
shielded
type
cable
as
shown
in
figure
4-1
below.
SHIELDED
CABLE
Jacket
Shield
Insulation
Wire
Figure
4-1
Shielded
Input
Cable
4-1