Bose 901 Series II User Manual
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The effect of the various control settings upon the frequency response (takir>g the normal or "dotted" posi-
HIGH FREQUENCY
The next frequency control of the 901 Equalizer is labeled HIGH FREQ. If the control is moved to the
DECREASE position, the frequency response of the system is decreased in the high treble range above
10 kHz. This control may be used as a scratch filter, or to modify the response of some recordings which
are excessively bright in the high treble range.
TREBLE LEVEL
The next frequency control is a rotary switch labeled TREBLE LEVEL. This control has 5 positions.
The third position is the normal, or "dotted" position. The "dotted" position is the preferred position for
use in rooms of average acoustical properties.
In a room that is extremely "bright" due either to room conditions or to the recording you are playing, you
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