ADVANCED
S.E.A.
PRESET PATTERNS
Try these
patterns
to
increase
your
listening
pleasure
with diff€rent types
of music. These are suggestions
from
JVC
ol
settings which will be
most
suitable
for
these
types ot tunes,
SOME MORE ABOUT S.E.A.
JVC1 oxclurivo tons control system
S.E.A.
splits the receiver's
output
into five frequency
bands with center frequencies of 40, 250, 1,000, 5,000
and 15,000H2. The conools
have
click
positions
above
and
below the
center
or
FLAT
position
so that
the re-
sponse
in each band can be varied by
ll2dB.
40Hz
Boost to brinq out the rich tones of su€h in-
struments as the
organ,
25OHz Soost to add
clarity to upper
bass
sounds
such as
woodwind instruments
and
cel.los.
Cut
to eliminate speaker boom.
1p00Hz
Effective to emphasize or deemphasize the
human voice and certain instruments.
5,000H2
Boost to add clarity to trumpets and violins.
Cut
to
reduce upper mid.ranqe response.
15,m0Hz
Boosts hish frequency
response
and
sives
a
feeling of
presence.
S.E.a.
makes
possible
more
flexible
control ov€r tone so
that various special effects can be obtained that were not
possible
with conventional bass and treble tone control
systems.
With
S.E.A.
used
judiciously,
the sound can
be tailored
to compensate for the acoustlc
propenies
of
your
listenlng room, rhe characterlstics of
your
audio
sysrem and rhe
properries
of different types of
/nLsk.
Compensation lor room acousiics
Rooms
with many
curtains and furnkhi6gs tend
to
absorb low frequency sound, in which case the 40Hz and
250H2 controls should be boosted. ln
rooms
which are
relatively sparsely
furnished,
sound
is ref
ected. In small
rooms
highs
tend to
be
emphasized
and in larg€ rooms,
lows. These different
prope(ies
can be compensated
for by
proper
adiustment of S-E.A.
Compe$ation
for
the ch6ractoristica of component3
Almost all
moving magnet cartridges have
peaks
ln their
response
curves
between 10,000 and 15,000H2 and
produce
harsh high frequency sounds.
Speakers
also are
not always
perfect-
Some
airtight enclosures reprod!ce
low freqlencies below
'l00Hz
poorly
and cause harsh
sounding
midrange
and
high frequencies. These
charac-
teristics of audio systems, which
cannot be compensated
for by conventional tone control systems,
can
be
per
fectLy
compensatFd
for
by S.E.A.t'ive
conr,ols.
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