<s>
A	O
speaker	B-Device
grille	I-Device
(	O
or	O
speaker	B-Device
grill	I-Device
)	O
is	O
usually	O
found	O
in	O
front	O
of	O
many	O
consumer	O
and	O
industrial	O
loudspeakers	O
,	O
and	O
consists	O
of	O
either	O
a	O
hard	O
or	O
soft	O
screen/grille	O
mounted	O
directly	O
over	O
the	O
face	O
of	O
the	O
speaker	O
driver	O
.	O
</s>
<s>
Studio	B-Device
monitors	I-Device
,	O
for	O
instance	O
,	O
are	O
required	O
to	O
reproduce	O
audio	O
so	O
accurately	O
that	O
anything	O
in	O
the	O
path	O
of	O
the	O
speaker	O
could	O
obscure	O
aspects	O
of	O
the	O
sound	O
,	O
and	O
thus	O
are	O
rarely	O
seen	O
with	O
grilles	O
.	O
</s>
<s>
On	O
the	O
other	O
hand	O
,	O
high	O
powered	O
subwoofers	B-Application
(	O
such	O
as	O
those	O
used	O
in	O
high-end	O
car	O
audio	O
applications	O
)	O
,	O
produce	O
such	O
violent	O
sound	O
waves	O
that	O
a	O
grille	O
may	O
be	O
susceptible	O
to	O
rattling	O
or	O
damage	O
while	O
the	O
driver	O
is	O
under	O
load	O
.	O
</s>
<s>
Some	O
speakers	O
simply	O
do	O
n't	O
need	O
a	O
grille	O
,	O
perhaps	O
because	O
they	O
are	O
enclosed	O
in	O
a	O
case	O
(	O
such	O
as	O
speakers	O
found	O
inside	O
personal	B-Device
computers	I-Device
)	O
and	O
are	O
not	O
meant	O
to	O
produce	O
high	O
fidelity	O
audio	O
,	O
but	O
only	O
audible	O
tones	O
and	O
noises	O
.	O
</s>
