<s>
Power	B-Device
alley	I-Device
is	O
a	O
term	O
used	O
in	O
audio	O
engineering	O
to	O
denote	O
the	O
line	O
between	O
subwoofers	B-Application
where	O
output	O
from	O
each	O
subwoofer	B-Application
is	O
in	O
phase	O
and	O
is	O
noticeably	O
louder	O
.	O
</s>
<s>
Subwoofers	B-Application
placed	O
at	O
each	O
side	O
of	O
the	O
stage	O
will	O
typically	O
cancel	O
unpredictably	O
everywhere	O
in	O
the	O
listening	O
area	O
except	O
along	O
the	O
center	O
line	O
between	O
the	O
speakers	O
.	O
</s>
<s>
Because	O
of	O
this	O
,	O
placing	O
subwoofer	B-Application
cabinets	B-Device
together	O
tends	O
to	O
give	O
a	O
smoother	O
response	O
to	O
each	O
member	O
of	O
the	O
audience	O
.	O
</s>
<s>
This	O
is	O
explained	O
in	O
detail	O
in	O
"	O
The	O
Power	B-Device
Alley	I-Device
"	O
.	O
</s>
<s>
The	O
effects	O
of	O
separated	O
subwoofers	B-Application
are	O
more	O
predictable	O
outdoors	O
,	O
but	O
subwoofers	B-Application
are	O
often	O
placed	O
together	O
as	O
a	O
starting	O
point	O
for	O
indoor	O
venues	O
,	O
too	O
.	O
</s>
