<s>
The	O
HDJ-1000	B-Algorithm
are	O
professional	O
DJ	O
headphones	B-Device
from	O
Pioneer	O
's	O
Pro	O
DJ	O
line	O
.	O
</s>
<s>
They	O
are	O
tightly	O
closed	O
dynamic	O
headphones	B-Device
.	O
</s>
<s>
Their	O
impedance	O
is	O
40	O
Ohms	O
,	O
with	O
a	O
maximum	O
input	O
of	O
3,500	O
mW	O
and	O
an	O
output	O
sound	O
level	O
of	O
107	O
dB/mW	B-General_Concept
.	O
</s>
<s>
Connection	O
is	O
via	O
a	O
gold-plated	O
3.5mm	O
3P	O
mini	O
plug	B-Device
and	O
a	O
3.94ft	O
long	O
single-coiled	O
cable	O
(	O
approx	O
.	O
</s>
<s>
The	O
HDJ-1000	B-Algorithm
headphones	B-Device
weigh	O
9.5	O
oz	O
(	O
excluding	O
cord	O
)	O
and	O
come	O
with	O
a	O
06.3mm	O
3P	O
plug	B-Device
adapter	O
with	O
screw	O
and	O
carrying	O
bag	O
.	O
</s>
<s>
These	O
headphones	B-Device
have	O
grown	O
to	O
be	O
a	O
DJ	O
standard	O
around	O
the	O
world	O
.	O
</s>
<s>
Recently	O
,	O
counterfeit	O
versions	O
of	O
these	O
headphones	B-Device
have	O
been	O
known	O
to	O
exist	O
(	O
)	O
.	O
</s>
