Harman Kardon hk990Vxi - Page 17

APPENDIX
|
Multiple
Your
Harman
Kardon
receiver
is
equipped
with
2
sets
of
speaker
outputs,
making
it
possible
to
add
extension
speakers
for
use
in
another
part
of
your
home,
or
for
matrix
surround
sound.
However,
the
total
impedance
of
both
speaker
pairs
can
be
no
less
than
4
ohms.
If
the
combined
impedance
is
lower,
you
will
not
be
able
to
play
either
set
of
speakers
very
loudly
without
causing
overload
problems.
Total
impedance
(Z)
when
operating
2
sets
of
speakers
is
calculated
with
the
following
formula:
_
R1XR2
~ RL+R2
where
R1
and
R2
are
the
individual
impedances
of
the
two
speaker systems.
APPENDIX
||
—
Antennas
For
While
it
may
seem
obvious
that
an
antenna
is
critical
to
good
reception,
it
is
often
not
given
sufficient
consideration.
The
results
can
be
significantly
reduced
tuner
performance
(a
classic
example
of
“garbage
in,
garbage
out”).
The
question
of
just
how
elaborate
an
antenna
installation
you
need
can
be
determined
by
considering
the
following:
1.
How
good
is
reception
in
your
area?
If
you
live
in
an
area
with
a
moderate
number
of
strong
FM
and
AM
stations,
you
may
not
need
as
large
an
antenna
as
you
would
if
you
live
ina
rural
area
or
an
urban
area
with
many
adjacent
stations.
Speakers
in Parallel
Therefore,
two
sets
of
8-ohm
speakers
in
parallel
represents
a
4-ohm
total
load,
well
within
the
operating
parameters
of
your
hk880Vxi/hk990Vxi
receiver,
providing
you
re-set
the
SPEAKER
OPERATING
MODE
switch
to
the
4-ohm
setting.
However,
two
sets
of
4-ohm
speakers
is
a
2-ohm
load
and
is
NOT
recommended.
If
you
have
any
questions,
consult
your
Harman
Kardon
Dealer
before
adding
a
second
set
of
speakers.
Your
hk880Vxi/hk990Vxi
2.
Are
you
interested
in
receiving
weak
or
distant
stations?
Some
very
interesting
programming
(ethnic,
classical,
college
formats,
for
example)
is
often
on
stations
with
very
low
transmitting
power.
Or
you
may
simply
live
in
an
area
far
removed
from
all
stations.
If
so,
you
should
consider
a
more
elaborate
antenna
installation.
3.
Is
stereo
separation,
bandwidth
and
freedom
from
interference
critical?
If
you
often
tape
broadcasts,
or
own
a
system
where
you
can
hear
critical
differences
in
broadcast
quality,
investing
in
a
better
antenna
can
increase
the
overall
fidelity
of
many
stations.