Operating The Graphic Equalizer - Pioneer SG-90 Operating Instructions Manual

OPERATING THE GRAPHIC EQUALIZER
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 ad-
justments than ordinary tone controls and sound field com-
pensation.
Some examples of operation are given below.
(4B) Amplitude of change in frequency
jesponse using ordinary tone con:
trols
10 190 Tk 10K
————we Frequency
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.
(2) 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.
mH
Level
Amplitude of change in frequency
response using graphic equalizer
controls
100 tk 10k (Hz)
Compensated peak Overall frequency response
Frequency ——=-
In a room surrounded by hard walls and
windows and having a bare floor, the bass
sounds are reflected to a great extent and
sounds dull. Lower the controls for 100 Hz
~~ 280 Hz and modify the bass range.
The acoustics undergo change in accor-
dance with the furniture in the listening
room, the height of the ceiling and the
listening position, among other factors.
Piay the music and try operating each of
the controls to produce the best effect.
In a room surrounded by drapes and with
carpets on the floor, there is minimal
reflection of the sound and the treble is
absorbed. At times like this, raise the con-
trols for 2.5 kHz, 4 kHz, and 6.3 kHz and
modify the treble range.