ADAM Audio Alpha Active Version - Handbuch (Seite 14)

14
6.4 Parametric Equalizer
The acoustic properties of specific rooms may cause
problems with authentic reproduction of music (see
5.1). Frequently the bass is the ‘problem child’ in the
attempt to create a natural sound, producing a ‘standing
wave’ – the overlapping of two waves of the same
frequency and phase spreading in opposite directions.
This results in local (at specific positions in a room)
imbalances of particular frequencies.
For example, in a room of 6 meters (20 feet) width and length, a stan-
ding wave typically occurs at approximately 28 Hz, meaning that this
tone sounds overemphasized and droning. Using the parametric equa-
lizer properly, a bass ‘overkill’ like this can effectively be neutralized.
Furthermore, specific listening habits or preferences may lead you to
want to change the lower frequencies to either emphasize or attenuate
the bass. The parametric equalizer is the perfect tool for this as well.
6.5 Equalization
The charts on the right illustrate the individual
settings of the equalizer: ‘Gain’ means the sound
pressure (volume), ‘Q’ (for Quality) representing
the effective width and ‘Freq’ the particular
frequency.
In case a problem like ‘ standing waves’ occur,
please proceed as follows:
• Lower the ‚Gain’ by -6 dB.
• Set ‚Q’ to 4.
• Now, slowly change the frequency (‚Freq.’) within
20 to 100 Hz until the distortion is no more audible.
6. Speaker Adjustment
Freq. (Frequency)
Gain
Q (Quality)