<s>
A	O
magnetic	B-Algorithm
cartridge	I-Algorithm
,	O
more	O
commonly	O
called	O
a	O
phonograph	O
cartridge	O
or	O
phono	O
cartridge	O
or	O
(	O
colloquially	O
)	O
a	O
pickup	O
,	O
is	O
an	O
electromechanical	B-Algorithm
transducer	I-Algorithm
that	O
is	O
used	O
to	O
play	O
records	O
on	O
a	O
turntable	O
.	O
</s>
<s>
The	O
first	O
commercially	O
successful	O
type	O
of	O
electrical	O
phonograph	B-Algorithm
pickup	I-Algorithm
was	O
introduced	O
in	O
1925	O
.	O
</s>
<s>
Although	O
electromagnetic	O
,	O
its	O
resemblance	O
to	O
later	O
magnetic	B-Algorithm
cartridges	I-Algorithm
is	O
remote	O
:	O
it	O
contained	O
a	O
bulky	O
horseshoe	O
magnet	O
and	O
employed	O
the	O
same	O
imprecisely	O
mass-produced	O
single-use	O
steel	O
needles	O
which	O
had	O
been	O
standard	O
since	O
the	O
first	O
crude	O
disc	O
record	O
players	O
appeared	O
in	O
the	O
1890s	O
.	O
</s>
<s>
However	O
,	O
during	O
the	O
1950s	O
,	O
a	O
new	O
generation	O
of	O
small	O
,	O
lightweight	O
,	O
highly	O
compliant	O
magnetic	B-Algorithm
cartridges	I-Algorithm
appeared	O
and	O
quickly	O
found	O
favor	O
among	O
high-fidelity	O
enthusiasts	O
because	O
of	O
their	O
audibly	O
superior	O
performance	O
.	O
</s>
<s>
They	O
soon	O
became	O
standard	O
in	O
all	O
but	O
the	O
cheapest	O
component	O
audio	O
systems	O
and	O
are	O
the	O
most	O
common	O
type	O
of	O
pickup	B-Algorithm
cartridge	I-Algorithm
in	O
use	O
today	O
.	O
</s>
<s>
Some	O
models	O
of	O
moving	B-Algorithm
magnet	I-Algorithm
cartridges	O
have	O
detachable	O
stylus	O
–	O
cantilever	O
sub-assemblies	O
that	O
allow	O
for	O
their	O
replacement	O
without	O
the	O
need	O
to	O
remove	O
and	O
replace	O
the	O
entire	O
cartridge	O
when	O
the	O
stylus	O
has	O
become	O
worn	O
.	O
</s>
<s>
In	O
high-fidelity	O
systems	O
,	O
crystal	O
and	O
ceramic	O
pickups	O
have	O
been	O
replaced	O
by	O
the	O
magnetic	B-Algorithm
cartridge	I-Algorithm
,	O
using	O
either	O
a	O
moving	B-Algorithm
magnet	I-Algorithm
or	O
a	O
moving	O
coil	O
.	O
</s>
<s>
Compared	O
to	O
the	O
crystal	O
and	O
ceramic	O
pickups	O
,	O
the	O
magnetic	B-Algorithm
cartridge	I-Algorithm
usually	O
gives	O
improved	O
playback	O
fidelity	O
and	O
reduced	O
record	O
wear	O
by	O
tracking	O
the	O
groove	O
with	O
lighter	O
pressure	O
.	O
</s>
<s>
Magnetic	B-Algorithm
cartridges	I-Algorithm
use	O
lower	O
tracking	O
forces	O
and	O
thus	O
reduce	O
the	O
potential	O
for	O
groove	O
damage	O
.	O
</s>
<s>
In	O
a	O
moving	B-Algorithm
magnet	I-Algorithm
cartridge	O
,	O
the	O
stylus	O
cantilever	O
carries	O
a	O
tiny	O
permanent	O
magnet	O
,	O
which	O
is	O
positioned	O
between	O
two	O
sets	O
of	O
fixed	O
coils	O
(	O
in	O
a	O
stereophonic	O
cartridge	O
)	O
,	O
forming	O
a	O
tiny	O
electromagnetic	O
generator	O
.	O
</s>
<s>
Moving	B-Algorithm
magnet	I-Algorithm
cartridges	O
are	O
more	O
commonly	O
found	O
at	O
the	O
'	O
lower-end	O
'	O
of	O
the	O
market	O
,	O
while	O
the	O
'	O
higher-end	O
'	O
tends	O
to	O
be	O
dominated	O
by	O
moving	O
coil	O
designs	O
.	O
</s>
<s>
For	O
example	O
,	O
the	O
state-of-the-art	O
Technics	O
EPC-100CMK4	O
with	O
0.055mg	O
of	O
effective	O
tip	O
mass	O
,	O
of	O
moving	B-Algorithm
magnet	I-Algorithm
design	O
.	O
</s>
