c a p a c i t y o f 5 0 W a t t s p r o g r a m m a t e r i a l , s p e c i a l l y i n t h e
l o w e s t r e g i s t e r o f t h e a u d i o s p e c t r u m . N e v e r t h e l e s s , i t c a n
b e s e e n t h a t t h e L 1 0 0 p r o d u c e s a v i r t u a l l y p e r f e c t r e p l i c a o f
t h e i n p u t s i g n a l .
A n u m b e r o f c o m p a c t l o u d s p e a k e r s y s t e m s c a n h a n d l e
l a r g e a m o u n t s o f p o w e r ; o t h e r s a r e h i g h l y e f f i c i e n t . J B L
p r o d u c t s a r e u n i q u e i n t h e i r a b i l i t y t o c o m b i n e b o t h
a t t r i b u t e s . T h e L 1 0 0 C e n t u r y , f o r e x a m p l e , w i l l c o n v e r t a 1 -
W a t t i n p u t o f " w h i t e n o i s e "
1
i n t o a s o u n d p r e s s u r e l e v e l o f
7 8 d B a t a d i s t a n c e o f 1 5 f e e t ? T h i s i s a p p r o x i m a t e l y t w i c e a s
l o u d a s o r d i n a r y c o n v e r s a t i o n a n d r e p r e s e n t s a c o m f o r t a b l e
l i s t e n i n g l e v e l , d e m o n s t r a t i n g t h a t t h e L 1 0 0 d e l i v e r s
s u b s t a n t i a l o u t p u t f r o m v e r y l i t t l e i n p u t p o w e r .
J B L a t t r i b u t e s m a j o r i m p o r t a n c e t o t h e v a l i d i t y o f
p u b l i s h e d i n f o r m a t i o n . R a t h e r t h a n r e p e a t t h e a m b i q u i t y o f
m o s t t e c h n i c a l s p e c i f i c a t i o n s , J B L h a s t r a d i t i o n a l l y r e f r a i n e d
f r o m l i s t i n g d a t a f o r w h i c h n o w i d e l y a c c e p t e d t e s t
1. "White noise" is a rigorous test simulating average
musical program material under laboratory conditions. It
provides a controlled means of energizing all the
transducers of a loudspeaker system simultaneously. "White
noise" encompasses all audible frequencies just as white
light includes all the colors of the visible spectrum.
Produced in the laboratory by a signal generator, "white
noise" sounds very much like the hiss heard between FM
radio stations.
2. A decibel (dB), in this context, is a unit expressing
relative loudness of sound. Three dB is approximately equal
to the smallest change in loudness of program material
ordinarily detectable by the human ear.
Comparison of input and output signals.
3
