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• Smart-Engage™ Auto-Turn-On – An auto-turn-on circuit is included within the amplifi er. A remote turn-on
wire is not necessary when connecting the amplifi er’s high level input to a high-powered source unit (car
stereo). The amplifi er will automatically turn on when music is received through this type of connection.
Note: Smart Engage™ is only active on the left input.
4. Input Sensitivity – The Input Sensitivity switch is used to set the proper input voltage range:
X1 POSITION: 100mV–1V (Typically for RCA Input)
X10 POSITION: 1V–10V (Typically for Speaker Level Input)
5. Gain Control – This feature is used to fi ne-tune the input sensitivity of the amplifi er to the source unit’s output
level.
6. Variable 40Hz-200Hz Low-Pass X-over with 24dB per octave Slope – This control allows the user to choose the
exact low pass frequency range the amplifi er will play for the best possible performance. The upper crossover
frequency point can be selected from 40Hz–200Hz at 24dB per octave.
7. Variable Subsonic Filter – This feature limits the lower end of the frequencies sent to the subwoofers. The
subsonic feature includes a control knob used to adjust the subsonic setting from 15Hz-60Hz at 12dB per
octave.
8. Parametric Equalizer – This one band parametric equalizer provides individual frequency, Q/bandwidth, and
+/-12dB gain adjustment controls. Any frequency from 30Hz to 80Hz can be chosen and boosted or cut up to
12dB. The “Q” ranges from 0.5 to 4.0 in value allowing a wide variety of bandwidth adjustment to address the
subtle tuning requirements common to mobile audio systems.
9. Remote Subwoofer Level Control (Remote Gain) – This port allows the use of the optional “remote level
control”. The Remote Subwoofer Level Control is a bass control module that can be installed in any location
within the vehicle for remote adjustments.
10. Phase Switch – The phase select switch allows you to invert the amplifi ers output phase by 180 degrees to
ensure the frequency interaction between the speakers is consistent within the vehicle. This also enables the
advanced bridging operation when using two amplifi ers on one speaker.
11. Processor Bypass – This feature routes the audio signal to around all enhancement features and crossover
fi lters to achieve a purely fl at response for use with outboard processors.
12. StreetWires Connectors – All MTX amplifi ers include StreetWires connectors for effi cient current and
maximum voltage transfer.
13. Speaker Connection – Two sets of speaker terminals are provided for dual woofer applications. When
connecting a single woofer, use only one set of speaker terminals (8 and 9 series are bridgeable with Phase
Switch).
14. Power Terminals – This is the main power connection for the amplifi er. The power and ground wire size
should be the same gauge.
• GND: The ground wire from this connection must be attached to bare metal on the vehicle. The distance to
the ground should be as short as possible and no more than 18”.
• REM: To turn the amplifi er on/off, this terminal must be connected to the source unit’s “remote or electric
antenna” wire.
• +12V: The power wire from this connection must be attached to the positive side of the vehicle battery.
• CAP+: Capacitor Positive Input - The ideal connection point for the positive sides of the capacitor to increase
the amplifi er’s performance.
• CAP-: Capacitor Negative Input - The ideal connection point for the negative side of the capacitor to increase
the amplifi er’s performance.