Carvin MX641 Instruction Manual - Page 22

denominator.

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capacitance. Oscillation is a form of electronic feedback that can ultimately damage your amplifier. See the following diagram to properly determine if your cables are shielded or not: COMPARISON OF SHIELD/NON-SHIELDED CABLES JACKET WIRE JACKET INSULATION INSULATION SHIELDED CORD SHIELD WIRE NON-SHIELDED CORD For speaker cable lengths up to 100', it is recommended that you use a 16 gauge or larger wire. For speaker runs up to 300', it is recommended that you use 14 gauge wire. This will proved the best possible "damping" performance from your amplifier and offer the greatest power delivery to your speakers. It is also advisable that you turn your unit "OFF" when connecting or disconnecting your speakers. 6. FORMULA FOR PARALLEL IMPEDANCE Usually when you are simply plugging two or more speakers into your amplifier you will be paralleling them to the ouput of your amp. In Series connections you will simply add the rated impedance of the speakers together to find the loading: EXAMPLE: 2 ohms + 2 ohms = 4 ohms When you are paralleling speakers, you should utilize the following formula to determine your amplifier loading: Take the rated impedance of each of your speakers, whether it is 8, 4, 3, 16 ohms or whatever. Invert these numbers into fractions. For instance 8 ohms would become 1/8, 4 ohms would become 1/4, and so on. Add each of these fractions together and divide the numberator by the denominator. The result will be your load impedance produced by your speaker system. For instance, two 8 ohm speakers connected in parallel would provide the following calculation: 1/8 + 1/8 = 2/8 Inverted = 8/2 = 4 ohms -TOTAL LOAD IMPEDANCE 3-16

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capacitance.
Oscillation
is
a
form
of
electronic
feedback
that
can
ultimately
damage
your
amplifier.
See
the
following
diagram
to
properly
determine
if
your
cables
are
shielded
or
not:
COMPARISON
OF
SHIELD/NON-SHIELDED
CABLES
JACKET
WIRE
JACKET
INSULATION
SHIELDED
CORD
INSULATION
SHIELD
WIRE
NON
-SHIELDED
CORD
For
speaker
cable
lengths
up
to
100',
it
is
recommended
that
you
use
a
16
gauge
or
larger
wire.
For
speaker
runs
up
to
300',
it is
recommended
that
you
use
14
gauge
wire.
This
will
proved
the
best
possible
"damping"
performance
from
your
amplifier
and
offer
the
greatest
power
delivery
to
your
speakers.
It
is
also
advisable
that
you
turn
your
unit
"OFF"
when
connecting
or
disconnecting
your
speakers.
6.
FORMULA
FOR
PARALLEL
IMPEDANCE
Usually
when
you
are
simply
plugging
two
or
more
speakers
into
your
amplifier
you
will
be
paralleling
them
to
the
ouput
of
your
amp.
In
Series
connections
you
will
simply
add
the
rated
impedance
of
the
speakers
together
to
find
the
loading:
EXAMPLE:
2
ohms
+
2
ohms
=
4
ohms
When
you
are
paralleling
speakers,
you
should
utilize
the
following
formula
to
determine
your
amplifier
loading:
Take
the
rated
impedance
of
each
of
your
speakers,
whether
it is
8,
4,
3,
16
ohms
or
whatever.
Invert
these
numbers
into
fractions.
For
instance
8
ohms
would
become
1/8,
4
ohms
would
become
1/4,
and
so
on.
Add
each
of
these
fractions
together
and
divide
the
numberator
by
the
denominator.
The
result
will
be
your
load
impedance
produced
by
your
speaker
system.
For
instance,
two
8
ohm
speakers
connected
in
parallel
would
provide
the
following
calculation:
1/8
+
1/8
=
2/8
Inverted
=
8/2
=
4
ohms
-TOTAL
LOAD
IMPEDANCE
3-16