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AMPLIFIERS

MVPA1 MVPA4

MVPA4 Only

MVPA1 Only

Freq

Phase

SETTING THE LOW-PASS FILTER

The low-pass lter (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 lter 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 lter (HPF) is designed to act as a “oor,” blocking

out any frequencies that fall below the selected crossover point. This

setting helps you lter 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.

NVX MVPA4 User Manual

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