Loading ...
Loading ...
Loading ...
Through an
algebraic
formulal,
combined
nominal speaker imped-
ances
(created
by
connecting two
,;-sêts
of speakers
to an
amplifier)
prodqcg,
a
lpwer total
impedance
than
just
one set
For
example,
two sets of 8-ohm
speakers
result
in
a
4-ohm combined
impedance.
lf the combined
impedance of
one L Series speaker
and one
o<-
tension speaker
is lower thon the
recommended
minimum
load,
your
amp/receiver
may not be able
to
produce any appreciable
volume
before triggering
its internal
protection
circuits
or fuse.
After
determining
the Nominol
lmpedonce of
the extension
speak-
ers and
tlre minimum allowable
load impedance
tlrat the amp/
receiver can
handle, consult the
chart at rþht.
lt indicates the
impedance
of
extension
speakers
which
can be
played
at
normal
volumes
sìmultaneously
with
the
L Series
speakers
in
your
main
listening
room.
lf
your amplifìer is r¿ted
for
iust
&-ohm
loads...combine
Ll's with
l6-ohm extension
speakers
only.
L3's with
l6-ohm octension
speakers only.
L5's witJr
l6-ohm extension
speakers
only.
L7's with
l6-ohm octension
speakers
only.
lf
your
amplifier
is rated
for 4-ohrn as
well as 8æhm
loads, combine...
Ll's with
l6-ohm or 8-ohm
extension
speakers.
L3's with
l6-ohm
or8-ohm
e><tension
speakers.
L5's with
l6-ohm
octension
speakers only.
L7's with
f 6-ohm extension
speakers
only.
lf
your
amplifier
is
rated for 2+hm,4-
ohrn and
S<,hm
loads, combine..
.
L |
's
with
| 6-ohm,
8-ohm or
4-ohm extension
speakers.
L3's with
l6-ohm,8-ohm
or
4-ohm extension
speakers.
L5's with
l6-ohm or
8-ohm
octension
speakers.
L7's with
l6-ohm or 8-ohm
octension
speakers.
NOTE:
lf
your receiver is not
raæd for
the kind of exænsion
speakers
you'd like to add,or
if
you
want to
power many
sets of speak-
ers at
once all over
your house,
you
will
need a special
impedance
matching/switching
box Consult
yourJBL dealer
for more
information. Also,
avoid
the
temptation
to hook any
more than
one
set ofspeakers
up to each
set
of amp/receiver
speaker
terminals
no matter what
the amp/receiver's
minimum
rated
load impedance
is.
OPERATION
Amplifier
power
Each L Series
speaker
has a
maximum and
minimum
power
råting. Using
more
power
than the
rating listed
on
page 12 of this
manual for
your
particular model
can
lead to
potential
damage. That
doesnt
mean
you
cant
use,for ex-
ample,
20O-watt-rated
L |
's
with a
250-watt
amplifier:
lt DOES mean
that
you
must
be careful
and not
turn
up the volume
so
high that its
output o<ceeds
the
maximum
recommended
power
for
your
particular L Series
speakers.
È
While
using a very
low
pbwered
amplifìer
at high
volumes
probably
wont
damage L Series
speakerc,
it
can
produce an unpleasant audible
effect called
"clipping."
lf the speak-
ers
sound
fu:zy or
distorted
when
the
amp's volume
control
is turned
up,
you're
hearing
advanced
clip-
ping.lf this effect
occurs and
you
wish
to
regularly enjoy
your
new
JBL
speakers
at
extremely
high
vol-
ume levels,
invest
in an amplifier
witlr
more
RMS wattage
output
The extra
reseryes
of
power
will
reduce clipping,
improve overall
sound and
let
you
get
the loudness
you
want
without
unpleasant
distortion.
lgeøay,6¡xRz)
-=q
ßl*Rz)
Wrere R
¡
bdrerurind
içedmcecfÛE
ñalt
+€dcr,
R2búersrid
hpeúnæcfûeeærr*n
+€dcrmd
q
b úe orùird
inpedmæ
æsened
oúeardfier.
t0
Loading ...
Loading ...