4. Setting the 20Hz–50Hz, 12dB Variable Subsonic Filter – This feature will help remove some of the potentially
damaging low frequencies from your subwoofer system. By turning this control all the way counter-clockwise
you are limiting the signal below 20Hz. By turning this control all the way clockwise you are limiting the signal
below 50Hz. Start at 20Hz and adjust this feature until your bass response sounds smooth and detailed.
5. Adjusting the Parametric Equalizer – In some applications, the bass amplifi er needs some help in boosting
or cutting certain frequencies. A parametric equalizer is distinguished from a conventional equalizer circuit
in that it allows the user to control the level of the boost or cut, as well as the center frequency and the
bandwidth of the boost or cut (the range of frequencies affected).
The following steps describe what each of the three 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 EQ.
• Setting the “Q”: The “Q” feature can be adjusted to affect a range of frequencies from as wide as 0.5 to as
narrow as 4.0 and as a general rule of thumb, start tuning with a “Q” setting below “2”. Higher “Q” values
are rarely needed unless there is some truly bizarre acoustic problem in the system. Lower “Q” values give
you a broader (and usually more natural-sounding) effect. A “Q” of “1.6” (10 o’clock setting) is a good starting
point.
• 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 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 amplifi er to double its power output for a given signal in the
boost region.
6. Remote Subwoofer Level Control (Remote Gain) – Let’s say the amplifi er’s gain is set at halfway. When the
remote subwoofer level control is plugged in, you now have external control of the gain from zero to halfway.
The installation of this level control is NOT necessary to get full power from amplifi er.
Note: One Remote Subwoofer Level Control can control two or more amplifi ers using a mini plug Y-adapter.
7. Setting the Phase – Depress the PHASE button to ensure the subwoofer interacts correctly between the mid-
bass or midrange speakers. The PHASE button is located in the PROCESSOR section of the control panel.
Whether you want the position of the phase at 0 degrees or 180 degrees will be determined once you hear
your audio system produce smooth, tight and louder bass. You need to try both 0 and 180 positions to hear
the difference.
8. Processor Bypass – The “PROCESSOR BYPASS” switch has two modes of operation, on or off. If the switch is
set to “ON” position, all Crossover fi lters and EQ controls are bypassed, leaving only the operation of the gain
control adjustments. If the switch is set to “OFF” position, all Crossover fi lters and EQ enabled.
9. Prizm EFX – Now that you have completed adjusting all your amplifi er settings, you can set the lighting effects
to your personal taste.
• Selecting Colors: You can change the backlit colors simply by turning the Pot 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.
