2.27High voltages can be present on the speaker terminals. Always connect speaker terminals with the power off, and use heavy gauge cable with no frayed strands or damaged insulation.
2.28Please be aware that power amplifiers have high power circuitry inside with potential for fire and shock hazard; never plug in a damaged amplifier until the condition of the internal insulation is checked. If a circuit breaker blows quickly when turning the amp on, the amplifier is defective and should not be restarted until the amplifier has been repaired. Failure to observe these precautions could lead to fire or shock hazard.
2.29Power amplifiers are inherently heavy and may become hot after use; provide adequate support and be careful how you hold the amplifier when handling it.
2.3 QUICK INSTRUCTIONS
2.31Stereo Operation These instructions cover the normal use of the amplifier in
2.32AC Power Connect the AC cord to a standard GROUNDED outlet only. The amplifier will operate satisfactorily over a +/- 10% range of voltages, but full rated performance will be met only at the rated voltage. Failure to properly ground the amplifier may result in unwanted hum and noise and will create a potential shock hazard.
2.33Floating Chassis Ground There is no provision for lifting signal ground relative to chassis ground on Series One amplifiers. For safety reasons do not lift the ground pin on the AC cord. Electronic balanced inputs are provided for hum rejection. Use balanced input cables to avoid hum, interference and ground loops.
2.34Input Programming Switches
2.35Octal Socket For normal operation, nothing should be plugged into the octal socket. It comes from the factory with a protective label to prevent corrosion of the pins.
2.36Input Connections The input polarity is as follows:
tip is “minus” or inverting input | |
| ring is “plus” or |
| barrel is ground, as always |
XLR plug: | pin 1 is ground, as always |
| pin 2 is “plus” or |
| pin 3 is “minus” or inverting input (AES Standard) |
Barrier Strip: | “GND” is circuit ground |
| “+” is “plus” or |
|
When making unbalanced connections, the barrel of an ordinary
2.37Speaker Connections Banana plugs, spade lugs, or bare wire ends can be connected to the
The 1100 features a pair of standard 1/4" headphone jacks on the front panel. They are connected to the speaker outputs of the amplifier through a resistive pad that prevents excessive power levels from damaging the headphones.
2.38Power Up Start with the gain controls off until proper operation is verified. Upon turning on the switch, the power LED should come on green. After three seconds, the muting circuit should release and turn on the sound. The amp should now be working, and the Gain controls can be advanced. In case of difficulty consult Section 3.9.
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