Bose 901 Series VI, 149393 manual Adjusting the sound, Using the MID-TREBLE and MID-BASS sliders

Using Your 901® Series VI Speaker System

Adjusting the sound

Adjust the sound using the MID-TREBLE and MID-BASS sliders and BASS control on the 901® active equalizer. Use the tone controls on your receiver only after the MID-TREBLE and MID-BASS sliders have been set according to the procedures below.

Using the MID-TREBLE and MID-BASS sliders

These controls let you make adjustments to compensate for the effects of speaker location, room acoustics, and program quality.

1.Select a familiar musical piece.

2.Set your receiver tone controls to the center (flat) position. If it has a loudness compensa- tion control (marked LOUD or LOUDNESS), set it to the OFF or OUT position.

3.Set the MID-TREBLE slider on the equalizer to its center position.

4.Play the selected music through the 901 speakers at normal volume. Move the MID-BASS slider back and forth several times and listen to the effect. You should hear a significant change in the fullness of the sound. If you do not, the active equalizer may not be engaged. Refer to Playing your speakers on page 14.

5.When you are familiar with the effect of the MID-BASS slider, set it to the extreme left. Start the musical passage again and slowly advance the MID-BASS slider to the right until the sound is rich and full, without excessive heaviness.

6.Replay the musical passage, this time moving the MID-TREBLE slider back and forth to become familiar with its effect. You should hear a significant change in clarity of the sound.

7.Set the MID-TREBLE slider to the extreme left and play the passage again. Slowly advance the MID-TREBLE slider to the right until the sound is clear and detailed without excessive shrillness.

Using the BASS control

The Bass control provides an alternate bass equalization. It is not a bass enhancement switch, and it is not intended to boost the bass output of the speakers.

Press the BASS control IN (to position 2) to engage an alternate form of equalization that changes the way the speakers handle low-frequency information. For example, you may

prefer­ pipe organ music with the alternate equalization. The control can also be useful in ­eliminating feedback or rumble from a turntable.

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