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C O N N E C T I N G T H E L 3 6 - JBL Decade L36 Instruction Manual

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C O N N E C T I N G T H E L 3 6

4
W h e n c o n n e c t i n g o r d i s c o n n e c t i n g
IMPORTANT:
l o u d s p e a k e r s f r o m a n a m p l i f i e r , t h e a m p l i f i e r m u s t b e
t u r n e d o f f . M a k i n g c o n n e c t i o n s w h i l e t h e a m p l i f i e r i s
o p e r a t i n g c o u l d s e r i o u s l y d a m a g e t h e l o u d s p e a k e r
s y s t e m a n d v o i d t h e w a r r a n t y .
E i g h t e e n - g a u g e i n s u l a t e d w i r e ( o r d i n a r y h o u s e h o l d
l a m p c o r d ) i s t h e m i n i m u m s i z e r e c o m m e n d e d f o r
l o u d s p e a k e r c o n n e c t i o n s u p t o 5 0 f e e t . B e y o n d t h i s
d i s t a n c e , h e a v i e r g a u g e i n s u l a t e d w i r e i s r e c o m m e n d e d ;
1 6 - g a u g e f r o m 5 0 t o 1 0 0 f e e t a n d 1 4 - g a u g e f r o m 1 0 0 t o 2 0 0
f e e t . I f l a m p c o r d i s u s e d , w i r e s c a n b e d i f f e r e n t i a t e d b y
n o t i n g t h a t o n e o f t h e i n s u l a t i n g j a c k e t s i s s m o o t h , w h i l e
t h e o t h e r h a s a d i s t i n c t r i d g e . B y c o n s i d e r i n g t h e r i d g e d
j a c k e t " r e d " a n d t h e s m o o t h j a c k e t " b l a c k , " w i r i n g
c o n n e c t i o n s c a n b e m a d e a s i f u s i n g c o l o r - c o d e d
C o n n e c t i o n s t o t h e a u d i o p o w e r s o u r c e a r e
u s i n g t h e t w o p u s h b u t t o n t e r m i n a l p o s t s l o c a t e d o n t h e
b a c k o f t h e l o u d s p e a k e r s y s t e m e n c l o s u r e . T h e h o l e s i n
J B L t e r m i n a l p o s t s d o n o t a l l o w t h e c o n n e c t i n g w i r e t o
p a s s a l l t h e w a y t h r o u g h , p r e v e n t i n g t h e p o s s i b i l i t y o f a
s h o r t t o t h e o t h e r t e r m i n a l p o s t o r t o n e a r b y e l e c t r i c a l
c o n d u c t o r s .
T o m a k e a s e c u r e c o n n e c t i o n , s t r i p a p p r o x i m a t e l y %
i n c h o f t h e i n s u l a t i o n f r o m t h e e n d o f t h e w i r e , p u s h
d o w n t h e s p r i n g - l o a d e d t e r m i n a l p o s t c a p , i n s e r t t h e
b a r e w i r e i n t o t h e e x p o s e d o p e n i n g o f t h e t e r m i n a l p o s t
a n d r e l e a s e . ( I n s e r t i o n o f t h e w i r e i n t o t h e o p e n i n g w i l l
b e e a s i e r i f t h e s t r i p p e d w i r e i s f i r s t t i n n e d w i t h a
s o l d e r i n g t o o l a n d s o l d e r . )
L o c a t e t h e l o u d s p e a k e r o u t p u t t e r m i n a l s o n t h e b a c k
o f t h e r e c e i v e r o r p o w e r a m p l i f i e r . F o r e a c h l o u d s p e a k e r
s y s t e m , c o n n e c t t h e w i r e f r o m t h e b l a c k t e r m i n a l p o s t t o
t h e a m p l i f i e r o u t p u t t e r m i n a l l a b e l e d " c o m m o n , "
" g r o u n d " o r ( — ) , a n d t h e w i r e f r o m t h e r e d t e r m i n a l p o s t
t o t h e r e m a i n i n g 8 - o h m s p e a k e r o u t p u t ?
N o t e t h a t m a n y a m p l i f i e r s h a v e a c h a s s i s g r o u n d i n g
t e r m i n a l w h i c h i s u s u a l l y i s o l a t e d f r o m t h e o t h e r
c o n n e c t o r s . T h i s s h o u l d n o t b e c o n f u s e d w i t h
" g r o u n d " d e s i g n a t i o n s o m e t i m e s u s e d t o d e s c r i b e
o f t h e t e r m i n a l s i n e a c h s e t o f l o u d s p e a k e r
3 . Connecting
both speakers
"in
phase"
operation;
monophonic
signal by moving
direction,
and not opposite
phase
operation
(which
wires
is reversed
with respect
system,
but may cause some acoustical
will have the audible
response.
as described
i.e., their cones will respond
simultaneously
to each other. Inadvertent
occurs
when one set of
to the other)
"cancellation"
effect
of reducing
low
w i r e .
m a d e
t h e
t w o
c o n n e c t i o n s .
will insure
proper
to a
in the same
out-of-
speaker
will not harm
the
which
frequency

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