Harman Kardon TC600 Owners Manual - Page 22

50Hz boost equalization Set all tone controls and equalizers to the flat setting. Turn the 50Hz EQUALIZATION control all the way counterclockwise. Acoustically balance your system using the inputloutput controls and faders on the amplifier, crossover, head unit, etc., until you achieve the best sound. While playing music with strong bass content, slowly turn the 50Hz EQUALIZATION control clockwise until the music sounds best to you or until the amplifier is just below clipping. Caution: Use this control carefully, since over-application of the 50Hz EQ boost could cause more excursion motion in your woofers than they were designed to handle! Indicator LEDs The POWER LED turns on when 10-15.W is present at the battery (+) terminal and the REMOTE-ON terminal. This indicates that the amplifier is functional. The PROTECTION LED turns on if any of the following conditions are present: If the speaker wires are shorted. If the speaker impedance drops below approximately 1.5 ohms in stereo or 3 ohms in bridged mono. If the amplifier overheats and the thermal protection circuitry is activated. Note: The TC Series amplifiers will turn off in under- or over-voltage conditions and will not leak DC voltage (which could damage speaker voice coils). Status indicator LEDs on TC series amplifier! Q 0 POWER 0 PROTECTION