Owner's Manual

32
Fundamental Frequencies of Acoustical Musical Instruments and the Human Voice
SOPRANO
CONTRALTO
TENOR
BARITONE
BASS
PICCOLO
FLUTE
OBOE
ENGLISH HORN
B CLARINET
BASS CLARINET
ALTO SAXOPHONE IN B
BASSOON
CONTRABASSOON
B TRUMPET
FRENCH HORN IN F
TENOR TROMBONE
BASS TROMBONE IN F
TUBA
MEDIUM
SMALL
LARGE
HARP
GUITAR
VIOLIN
VIOLA
CELLO
BASS
PIANO
STRINGS
KETTLE DRUMS
BRASS
WOODWINDS
SINGING VOICE
50Hz
200Hz
1kHz
10kHz
25Hz
100Hz
400Hz
2.5kHz
Equalizer Controls
The MA12000 has eight signal strength controls that
can pass through, amplify or attenuate each, all or any
combination of the marked equalizer frequencies.
Equalization frequencies are set to 25Hz, 50Hz,
100Hz, 200Hz, 400Hz, 1,000Hz, 2,500Hz and
10,000Hz.
Frequency Controls are individually adjustable and
can provide up to +12dB maximum amplication and
-12dB attenuation.
Placing any Control Knob in the center detent position
removes the tone circuit components from the signal
path allowing the frequency of interest to pass through
unaltered.
The illustration to the right shows the fundamental
frequency range of acoustical musical instruments and
the human voice. It also shows the range of adjustment
of frequencies for each of the Equalizer Controls of
the MA12000 at the +6dB and -6dB points.