User manual CERWIN-VEGA CV-900

[. . . ] Protect the power cord from being walkied on or pinched particularly at theplugs, conenience receptacles, and at the point where they exit from the amplifier. Use this amplifier only withcarts and rack equipment rated for this type of equipment. When a cart or rack is used use caution when moving to avoid injury from a tip-over. Unplug the amplifier during lightening storms or when unused for longperiods of time. [. . . ] These lights should not light up during normal use as they indicate signal outside of the amplification range of the amplifier. When a signal is "clipped" and the clip indicator illuminates, it means that the signal is being distorted at the output stage. Prolonged clipping can not only damage your amplifier, but also your speakers, so be careful to monitor the clip indicator during setup and use. If the clip indicator is illuminated then simply lower the channel gain or input signal until the indicator does not light. 4. Signal Indicators These blue LED's will illuminate to indicate that a signal is present at the amplifier input, and that the signal is being amplified. 8. Channel input level control These two 21-position detented potentiometers adjust input level for their respective amplifier channels. In Bridged Mono Mode, only channel 1 level control is used to adjust signal level. In Parallel Mode, both input level control are used to adjust signal level for their respective amplifier channels. At their fully counter-clockwise position, the signal is attenuated by more than 80dB. When 0 dBu of signal arrives at the input jacks and the Channel input level controls are set to their fully clockwise position, the unit delivers full power output. 7. Protect Indicators These red LED's indicate that the channel is in Protect mode. When the channel goes into protect mode all output for that channel will be muted. The protect LED's light when overheating or other severe problems occur. The LED's also light for approximately five seconds whenever the unit is powered on and fade slowly when the amplifier is powered off. These blue LED's indicate that AC power is connected and the amplifier is turned on. 6. Input connectors Connect the input source to the balanced combo connectors using either XLR or 1/4" TRS plugs. They are configured as follows : Pin 2 (Tip) hot, Pin 3 (Ring) cold, and Pin 1 (Sleeve) ground. We recommend using balanced three-conductor cabling wherever possible. Unbalanced two-conductor 1/4" plugs can also be inserted into these inputs, but you will get better signal quality and less noise and hum if you use balanced lines. Stereo signal should be connected to the Channel 1 and Channel 2 input jacks. When operating the unit in Bridged Mono or Parallel modes, use the Channel 1 input jack only. Link connectors These jacks are used to send a parallel signal to another device or amplifier. 1. Cool air enters the amplifier through the fan filters located on the front of the amplifier. [. . . ] Recommended minimum nominal load impedance for stereo operation is 2 ohms per channel. Parallel Mode When set to Parallel mode, a signal applied to channel 1's input will be amplified and appear at outputs for both channel 1 & 2. The parallel mode is well suited for applications in which driving two speakers with the same signal but with separate amplification. The `Channel1' and `Channle 2' input gain controls individually control the out put level on channels 1 and 2. Bridged Mono Mode Bridged mono mode straps both amplifier channels together to make a very powerful, single-channel monaural amplifier. [. . . ]