User manual STANTON A.900

[. . . ] A. 900 / A. 1800 / A. 2800 HEAVY DUTY PROFESSIONAL AMPLIFIERS USER MANUAL IMPORTANT SAFETY INSTRUCTIONS 1. Read Instructions ­ All the safety and operating instructions should be read before this product is operated. Retain Instructions ­ The safety and operating instructions should be retained for future reference. Heed Warnings ­ All warnings on the appliance and in the operating instructions should be adhered to. [. . . ] Fan Vent The A-Series amplifiers are cooled by two rear-mounted fans (except for A. 900 which is cooled by a single rear mounted fan). Cool air flows through the front fan filters, reducing the temperature internal components while forcing the heat out the rear vents. Active Indicators These blue LED's indicate that AC power is connected and the amplifier is turned on. 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. 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. 5. Clip Indicators These red LED's will illuminate at the clipping threshold. 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. 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 are 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 counterclockwise 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. REAR PANEL CONTROLS 1. Cool air enters the amplifier through the fan filters located on the front of the amplifier. Be sure not to block these ports when installing the amplifier or other equipment. 2. 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. [. . . ] Signal at channel 1's input produces output at channel 1, while signal at channel 2's input produces output at channel 2's output. 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. Bridged Mono Mode Bridged mono mode straps both amplifier channels together to make a very powerful, single-channel monaural amplifier. [. . . ]