Yamaha Q2031B Operation 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
(2/8 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
Response [dB]
415
х | AAAAANAR A AAA AAA à AAAI ANNA anA
IAN AU RINA AAA Н А Ј AA O
САХ
| 4
5
ЫЗЫ Се АРКАН
XXIX MA РО
K ХХХ уф POSE ХҚ ИМ
, А ОУ
>
| ST YU
AAA
10 10k
Frequency H iz
GQ2015A . |
Response [dB]
+15 „AARIA ANA ALA]
| А МАХХАХМАКХКХА.
"A УБА Бе СР У SES
III СЫЯ ka]
J L XXX X KXK КАА
| Г МУ УМУМ УМ HI
10 100 10k 30k
Freq џепсу Ha
d
р
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.
10k 20k
20 50 100 200 500 1к 2k 5k
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