Bose 901 II Series Owner's Manual page 13

12
EQUALIZER RESPONSE IN DECIBELS
RELATIVE TO THE RESPONSE
OF THE EQUALIZER WITH
ALL SWITCHES IN THEIR
NORMAL POSITIONS
5
TREBLE LEVEL
SWITCH POSITION
BELOW 40
OW 40 CONTOUR
50
EQUALIZER REPSONSE IN DECIBELS
RELATIVE TO THE RESPONSE
OF THE EQUALIZER WITH
ALL SWITCHES IN THEIR
NORMAL POSITIONS
5
FREQUENCY RESPONSE CONTOURS OF THE BOSE 901 SERIES-II
ACTIVE EQUALIZER WITH THE HIGH FREQUENCY SWITCH IN
THE NORMAL POSITION.
500 1,000
FIG. 9
5,000 10,000
——t
TREBLE LEVEL
SWITCH POSITION
HIGH FREQUENCY
FREQUENCY RESPONSE CONTOURS OF THE BOSE 901 SERIES-1!
ACTIVE EQUALIZER WITH THE HIGH FREQUENCY SWITCH IN
THE DECREASE POSITION.
500 1,000
FIG. 10
1
5,000 10,000 N_ 20K
TREBLE LEVEL