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5. Adjusting the Quasi Parametric Equalizer – In some applications, the bass amplifier needs some help in
boosting or cutting certain frequencies. A quasi parametric equalizer is distinguished from a parametric EQ in
that it allows the user to control only the level and the center frequency of the boost or cut but not the “Q”.
The following steps describe what the two controls of the parametric Bass EQ do in isolation. It is important to
understand these behaviors, because they must all be considered when setting up the Bass EQ.
• Setting the Frequency: Begin listening for the loudest musical spot or range within the bass range of your
sound system. Adjust the center frequency to match this point. For most systems, the best center frequency
adjustment will be between 40-50Hz. Use 45Hz (12 o’clock setting) as a starting point and adjust up or down
gradually.
• Setting the Boost/Cut: Once you have determined the loudest musical spot or range within the bass range
of your sound system, start cutting until the response is smooth and even. You can also boost low spots
within the musical range, but don’t go crazy with the boost knob. There is a lot of boost available, 12dB, but
begin with a low boost setting (around 3dB) and try to stay below 6dB whenever possible. Remember that for
every 3dB of additional boost you dial in, you are asking the amplifier to double its power output for a given
signal in the boost region.
6. Remote Subwoofer Level Control (Remote Gain) – Let’s say the amplifier’s gain is set at halfway. When the
remote subwoofer level control is plugged in, you have external control of the gain from zero to halfway. The
installation of this level control is NOT necessary to get full power from the amplifier.
Note: One EBC (External Bass Control) can control two or more amplifiers using a mini plug Y adaptor.
7. Prizm EFX – Now that you have completed adjusting all your amplifier settings, you can set the lighting effects
to your personal taste.
• Selecting Colors: You can change the backlit colors simply by turning the dial labeled PRIZM COLOR,
located in the MTX PRIZM EFX section of the control panel, left or right. Starting at the left most position, the
colors range from RED to GREEN, BLUE, and then RED again. You can choose any color in between making
the combinations unlimited.
• Selecting the EFX Feature: You can switch Prizm EFX lighting to “pulsate” with the beat of the music.
Simply depress the button labeled PRIZM EFX located in the in the MTX PRIZM EFX section of the control
panel to turn this feature on or off.
Trouble Shooting
Read this if you want to be a do-it-yourselfer or give us a call at 800-CALLMTX.
PROBLEM CAUSE SOLUTION
No LED indication No +12V at remote connection Supply +12V to terminal
No +12V at Power connection Supply +12V to terminal
Insufficient ground connection Verify ground connection
Blown power fuse Replace fuse
LED on, no output Volume on head unit off Increase volume on head unit
Speaker connections not made Make speaker connections
Gain control on amplifier off Turn up gain
Signal processing units off Apply power to signal processor
All speakers blown Replace speakers
Output distorted Head unit volume set too high Lower head unit volume
Amplifier gain set too high Lower amplifier gain
Balance reversed Speakers wired L + R reversed Wire speakers with correct orientation
RCA inputs reversed Reverse RCA input
Bass is weak Speakers wired out Wire with correct of phase
phase
Not using MTX woofers Buy MTX woofers
Blowing fuses Excessive output levels Lower volume
Amplifier defective Return for service