Yamaha GQ2015A - Manual (Page 6)

FRONT PANEL
O Equalizer controls
Q2031B/GQ1031C:
The 20 Hz to 20 kHz spectrum is divided into 31 bands
(1/3 octave steps), and each of these bands is equipped
with an equalizer control that allows boosting/cutting the
corresponding center frequency.
GQ2015A :
The 25 Hz to 16 kHz spectrum is divided into 15 bands
(2/3 octave steps), and each of these bands is equipped
with an equalizer control that allows boostIng/cuttIng the
corresponding center frequency.
The scales on either side of the controls are calibrated to indicate
the correct setting values when the RANGE switch is off (+/-12 dB
range). When the RANGE switch is on (+/-6 dB range), the true
values are one-half of the calibrated values.
Q2031B, GQ1031C
a
d)
§. “
To get the best performance from your equalizer, it is important
that you understand the frequency components that make up the
sounds of each musical instrument. The following graph is pro­
vided to aid this understanding.
You should also bear In mind, that besides fundamental frequen­
cies harmonics also can have a significant impact on timbre.
5 0P i no
it >
T<n >r
Bi rl 0 It
ia:
riolin
Gu tar
}a:s
Bai St b 1
Bas itroi ib<n<
T onlb
s It lO saxothoh»
i i rronie
bal
1 >et
rin psn
S iar<<1u n
das c tJn
PI n 1
ylee:ritc T a
Syi^ th<si :e
100 200 500 Ik
FREQUENCY (Hz)
Frequency (Hz]
Frequency [Hz]
O SIGNAL and PEAK indicators
This SIGNAL indicator LED lights up when the output signal
level is within 13 dB below nominal level. The indicator con­
firms that the current signal level settings are suitable.
The PEAK indicator LED lights up when the output signal
level reaches 3 dB below clipping level. If the PEAK indica­
tor LED lights continuously, the overall level is too high and
must be reduced using one of the two following methods:
(1) By reducing the overall level with the LEVEL control
(2) By reducing the levels of each equalizer band