User manual JBSYSTEMS LIGHT AX V1.2

[. . . ] The lightning flash with arrowhead symbol within the equilateral triangle is intended to alert the use or the presence of un-insulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock. The exclamation point within the equilateral triangle is intended to alert the user to the presence of important operation and maintenance (servicing) instructions in the literature accompanying this appliance. To take full advantage of all possibilities, please read these operating instructions very carefully. Strong Aluminum 19" front To prevent fire or shock hazard, do not expose this appliance to rain or moisture. [. . . ] While switching the amplifier off, the "protect led" turns on for a short time. BRIDGE LED: (only for VX200 and AX700MK2 / VX700MK2) Indicates that the amplifier is working in bridge mode. This means that both channels are switched together in series to act as one mono amplifier. However the impedance of the connected speaker cabinets must be twice compared to that of normal stereo mode. In bridge mode, you have to apply the signal only to the left input of the amplifier. Attention: Take care not to use speaker cabinets with a total impedance lower than 8. VENTILLATION HOLES: during its operation the amplifier produces heat that needs to be dissipated. The fans inside the amplifier must be able to evacuate the heat in the most effective way. Therefore is it very important not to cover any of the ventilation openings as this may result in overheating. This means that both channels are switched together in parallel to act as one mono amplifier. However the impedance of the connected speaker cabinets must be half compared to that of normal stereo mode. In parallel mode, you have to apply the signal only to the left input of the amplifier. Attention: to be able to produce the indicated power, the total impedance of the connected speaker cabinets must be around 2 !POWER LED: This blue led is on when you turn the amplifier on using switch(2). A few seconds after switching on the amplifier it is ready for operation. You can use these controls to set the maximum sound level of your setup: · Put on some music on and make sure the VU meters on your mixer are at 0dB. Open the Gain controls from the amplifier (3) until the maximum desired sound level is reached. ⷠMake sure nobody can reach the Gain controls of the amplifier. (in some cases the DJ is not ) Note for VX200 and AX700MK2 / VX700MK2: In Parallel and Bridge mode, only the gain control of the left channel is used to adjust the input sensitivity. CLIP LED: Turns on just before the maximum, distortion free, output level of the amplifier. [. . . ] There are 3 ways to connect the speaker cabinets using the binding post connectors: GROUND LIFT switch: In some cases nasty hum noises can occur due to ground loops in your setup. Setting the Ground lift switch to the position "lift" breaks the ground loop between the amplifier and the chassis grounds of various other components in your setup. If you need more power, you can operate the amplifier in bridge or parallel mode. XLR inputs: You can connect these balanced inputs to balanced and unbalanced line level audio sources (example: DJ-mixer): · JACK inputs: You can connect these balanced inputs to balanced and unbalanced line level audio sources (example: DJ-mixer): · Always replace a blown fuse by another with exactly the same specifications. [. . . ]