NVX MVPA1, Руководство пользователя, Страница: 7 / 12

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AMPLIFIERS
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Freq
Freq
Freq
Freq
Freq
Phase
SETTING THE LOW-PASS FILTER
The low-pass filter (LPF) is designed to act as a “ceiling,” blocking out
any frequencies that are above the low pass setting crossover point.
This setting helps you filter out undesirable mid to high frequencies not
designed to be played on subwoofers. A good starting point is 80hz as
frequencies below 80hz are non directional. To set the LPF, simply turn
the knob to the desired crossover frequency.
SETTING THE PHASE CONTROL
Most car stereo installations feature the tweeters and midwoofers in the
front of the car, close to your ears. However, the subwoofer is usually
located in the trunk or rear of the car as far as 6-10 feet away . The
integrated phase adjustment knob can be used to help the sound from
all the speakers reach your ears at the same time.
To set the phase control, start with the knob turned to zero. Gradually
adjust the setting until the bass sounds as if it is coming from the front
or center of the car, rather than from behind you. This may take several
minutes as you listen carefully to achieve the desired sound.
SETTING THE HIGH-PASS FILTER
The high-pass filter (HPF) is designed to act as a “floor,” blocking
out any frequencies that fall below the selected crossover point. This
setting helps you filter out undesirable bass frequencies for larger
speakers and woofers. A good starting point is 80hz as this frequency
range is above most speaker and tweeter resonant frequency levels,
and will blend well with your low pass setting of 80hz as well.
To set the HPF, simply turn the knob to the desired crossover frequency.