User manual STANTON A.1800

[. . . ] 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. [. . . ] Rack Ears These ears are used to mount the amplifier in any standard 19" rack. 2. 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. Never block these vents and keep them clean at all time. AC Power Switch This switch powers the unit on and off. 6. 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. This is to protect any speakers connected to the channel. 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. At their fully clockwise position, the signal is at unity gain. [. . . ] One channel "pushes" and the other channel "pulls" equally, doubling the power over that of either channel alone. Therefore the voltage is doubled, the peak power is quadrupled, and program power is roughly three times as high as that of the individual channel. Signal is applied to the channel 1 input only and channel 1 input gain control is used to adjust signal level. The input gain control belonging to channel 2 are not used. [. . . ]