Pioneer GR-470 Operating Instructions Manual page 7

USING THE EQUALIZER CONTROLS
The graphic equalizer divides the music source into a number
of frequency bands and boosts or attenuates the level at
each of the frequencies, enabling much finer sound quality
adjustments than ordinary tone controls and sound field
compensation.
Some examples of operation are given below.
GRAPHIC EQUALIZER
SO ems 150 em SOC mmm 1 come 2.4K comes GK ee 15K eee 12
COMPENSATING FOR THE PLAYBACK
FREQUENCY RESPONSE
The frequency response of a phono-cartridge or speaker has
peaks and dips in the high range and low range. It can be
made flat by adjusting finely the controls on the graphic
equalizer.
IMPROVING THE ACOUSTICS OF THE
LISTENING ROOM
The ideal listening room is one where the transmission fre-
quency response is flat. In actual fact, however, the
acoustics vary depending on the effects of the structure of
the room and its furniture, and on the listening position.
Although there is minimal treble attenua-
tion in a listening room surrounded by
hard walls and windows and having a
bare floor, the bass sounds are reflected
to a great extent.
In rooms like this, turn up the 150 Hz
control slightly. .
In a room surrounded by drapes and with
carpets on the floor, there is minimal
reflection of the sound and both the bass
and the treble are absorbed.
Amplitude of change in frequency
response using ordinary tone con-
Level
— Frequency
Amplitude of change in frequency
response using graphic equalizer
controls
Peak
or wns,
ow
=
TS
Compensated peak
Overall frequency
response
Frequency ——=—
In rooms like this, turn up the 60 Hz con-
trol slightly and turn up the frequency
controls above 2.4 kHz gradually.
The above examples are extremely
general.
The acoustics undergo change in accord-
ance with the furniture in the listening
room, the height of the ceiling and the
listening position, among other factors.
Play the music and try operating each of
the controls to produce the best effect.
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