User manual JBSYSTEMS LIGHT C3-1800 V1.3

[. . . ] To avoid condensation to be formed inside, allow the unit to adapt to the surrounding temperatures when bringing it into a warm room after transport. Condense sometimes prevents the unit from working at full performance or may even cause damages. No objects filled with liquids, such as vases, shall be placed on this appliance. If a foreign object enters the unit, immediately disconnect the mains power. [. . . ] (screws not provided) Take care to minimize shocks and vibrations during transport. When installed in a booth or flight case, please make sure to have good ventilation to improve heat evacuation of the unit. To avoid condensation to be formed inside, allow the unit to adapt to the surrounding temperatures when bringing it into a warm room after transport. Condense sometimes prevents the unit from working at full performance. CLEANING THE APPLIANCE: Clean by wiping with a polished cloth slightly dipped with water. Do not use volatile liquids such as benzene or thinner which will damage the unit. for the signal inputs we recommend using good quality signal cables to ensure excellent audio quality. For example use JB cables with order codes: 7-0061 (XLR/XLR L=1m) or 7-0063 (XLR/XLR L=5m). Suitable cables are for example JB order codes: 2-0505 (L=5m) or 2-0510 (L=10m). The picture shows one of the possible setups with the C3-1800 amplifier. You can use these controls to set the maximum sound level of your setup: Turn both controls on the amplifier (1) to the left. Put on some music on and make sure the VU meters on your mixer are at 0dB. (from time to time the red zone is lit) Set the Master output from your mixer to maximum. Open the Gain controls from the amplifier (1) until the maximum desired sound level is reached. PROTECT LED: The protection LED is on when the speakers are disconnected from the amplifier. This occurs in the following situations: During the first seconds after switching on the amplifier. While switching the amplifier off, the "protect led" may turn on for a short time. CLIP LED: Turns on just before the maximum, distortion free, output level of the amplifier. The clip leds may turn on shortly from time to time but they may certainly not turn on for longer periods. SIGNAL LED: The green signal led indicates that a music signal is present at this channel input. Put on some music and turn this control slowly up until there's a nice balance between the high/mid satellite speakers and the subwoofer. SUB PROCESSOR: Controls the amount of low band signal, produced by the bass processor, from zero to maximum. [. . . ] SUBWOOFER OUTPUT: use this Speakon® compatible connector to connect your subwoofer cabinet. Refer to chapter "connections" to learn which cables are suitable. SATELLITE OUTPUTS: use these Speakon® compatible connectors to connect your mid/high satellite cabinets. Refer to chapter "connections" to learn which cables are suitable. [. . . ]