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GX (glass & crystal ferrite) HEAD
Akai has
equipped
this
model
with
its new and amazing GX
Recording
and
Playback Heads
to
bring
you
unequal!ed
open
reel high fidelity sound. With
the
GX Head, high
frequencies can be
recorded
in
al!
their
true
fidelity
covering
25,000
Hz
with
low noise tape.
In
other
words
,
with
this
completely
new Glass & Crystal
Ferrite
Head, high
dynamic
range and excellent signal
to
noise
ratio
are
achieved.
The
secret
of
this success lies in
the
head
materials,
superior
processing
technique,
and
the
focused-
field recording system.
The
core
of
this
quality
head
is
made
of
single crystal ferrite and
is
mounted
and
set in
glass.
The
superior
high range characteristics are
contrib-
utable
to
the
structure
of
the
head gap
which
focuses
the
magnetic field
into
a sharp
oblong
radius. This focused-field
recording system minimizes high
frequency
loss, eliminates
undue
equalization
and
achieves a
wider
dynamic
range.
DOLBY NOISE REDUCTION SYSTEM
Prior
to
the
Dolby System,
tape
hiss, amplifier noise from
resistors and transistors,
induction
noise from
the
head le ad
wires,
etc
., existed regardless
of
the
kind
of
recorder.
Naturally,
the
degree
of
such noise
depended
much
upon
the design and
quality
of
the
unit.
Nevertheless, with even
the
highest
quality
units,
the
elimination
of
those
noises,
especially
tape
hiss, was
thought
to
be impossible. With
the
Dolby System, however,
tape
hiss
is
reduced
to
a corn-
pletely inaudible level. Basical!y, this
system
boosts
the
low
level signais
before
recordjng and lowers
them
by
precisely
that
same am
ou
nt at
playback
time.
That
is
to say,
at
low
signal levels where noise
is
most
apparent,
boosting
is
maximum,
and as signal levels rise,
boosting
is
reduced.
Then,
at
playback
time, these
boosted
signais are lowered
precisely and
proportionately
according
to
the
previously
boosted
level. During this pro cess
the
extraneous
and
superimposed
noises
are
eliminated and hissing noise is
amazingly
reduced.
This
system cou pIed
with
the
character-
istics
of
the
GX Head and
the
Tape
Selector
Switch
enabling
employment
of
low noise
tape
produces
a
hereto-
fore
unheard
of
musical clarity.
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