Equalizer Controls; Optical And Coaxial Digital Inputs - McIntosh MA8900 Owner's Manual

Equalizer Controls

The MA8900 Equalizer has five Frequency Controls
which will raise or lower by 12dB, the amplitude of
the band of frequencies centered at the frequency
marked above the controls. The center frequencies of
these controls are at 30Hz, 125Hz, 500Hz, 2,000Hz
and 10,000Hz. Both Left and Right Channels are
affected. At the center detent or flat position of the
controls, the tone circuit components are removed
from the signal path.
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 MA8900 at the +6dB and -6dB points.

Optical and Coaxial Digital Inputs

When a Digital Input (Optical or Coaxial Connection)
on the MA8900 is selected, the Front Panel Display
will indicate the sample rate when a signal is present
"48kHz". Refer to figure 76.
COAX 1
48kHz
Figure 76
During the time there is no Digital Signal present on
the selected input the display will indicate "______".
Refer to figure 77.
COAX 1
______
Figure 77
Fundamental Frequencies of Acoustical Musical Instruments and the Human Voice
30%
30%
CONTRABASSOON
SMALL
MEDIUM
LARGE
BASS
30Hz
125Hz
How to Operate the MA8900, con't
SOPRANO
CONTRALTO
TENOR SINGING VOICE
BARITONE
BASS
FLUTE
OBOE
ENGLISH HORN
B CLARINET
BASS CLARINET
ALTO SAXOPHONE IN B
BASSOON
B TRUMPET
FRENCH HORN IN F
TENOR TROMBONE
BRASS
BASS TROMBONE IN F
TUBA
KETTLE DRUMS
HARP
GUITAR
VIOLIN
VIOLA
CELLO
500Hz
2kHz
PICCOLO
WOODWINDS
STRINGS
PIANO
10kHz
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