[. . . ] They can scratch the surface of the panel and/or cause the indicator letters to peel off. To prevent batter rise When the unit is used in the ACC ON position without turning the engine ON, it depletes the battery. Protection function There is a Protection function installed in the unit to protect the unit and speakers from various problems. (Refer to page 6) To prevent damage to the machine, take the following precautions: • Be sure the unit is connected to a 12V DC power supply with a negative ground connection. [. . . ] CH LPF FREQUENCY control Sets the cutoff frequency when the FILTER switch is set to LPF. 5 OPERATION switch This switch is used to select the operation mode of the amplifier. CH LPF FREQUENCY control This control adjusts the frequency band output from this amplifier SUB. 7 INPUT SELECTER switch (AB/A) This switch toggles the input signal of amplifier B. € MONO (Lch) position: Amplifies the signal input from the left side only. Set to this position and make bridged connections to use as a high-power • AB position: The input for terminal A is output from amplifier A, while the input for terminal B is output from amplifier B. 4 English Removing the cover Hexagon Wrench Tighten Loosen !€ A position: The input for terminal A is output from amplifiers A and B. Switch is set in the remote position, the bass boost amount and frequency offset can be controlled from the center unit. € AB position: The input for terminals A and B input is mixed and output from amplifier SUB. € Bass boost Center unit display "Flat"/ "OFF"/ "1" "+6"/ "1"/ "2" "+12"/ "2"/ "3" "+18"/ "3"/ "4" Center unit display "Normal" Setting Bass boost OFF (Flat) Bass boost +6 dB Bass boost +12 dB Bass boost +18 dB • SUB position: The input for the SUB terminal is output by amplifier SUB. (Bass management system) switch Bass boost centered on the frequency set by the B. Switch is set on "+12dB"/ "REMOTE" the emphasized center frequency is adjusted. For the center unit control method and setting display, refer to the Instruction Manual for the center unit. There may be cases when the center unit can’t set the "Bass boost +18dB" or "Frequency Offset". 9 V-COLOR (Variable color) button Select the ON color for the indicator. Every time the button is pressed, 7 fixed colors and the variable color change. You are notified of the unit’s condition and malfunction (Protection function) by the indicator. When operation is normal NOTE The color you want can be selected with the variable color button. € The color blinks blue – When during operation – When the center unit/B. When the battery wire is too small or too long and can’t supply enough current. € The color blinks purple When the unit has failed and direct current voltage is generated to the speaker’s output. [. . . ] Failure to do so will result in a drop of the combined impedance with the subwoofer. € Ensure that the withstand voltage and current ratings of the capacitors (C) and coils (L) are sufficient. English 13 Troubleshooting Guide What might appear to be a malfunction in your unit may just be the result of slight misoperation or miswiring. Before calling service, first check the following table for possible problems. [. . . ]