18 Watt 8 ohm audio power amplifier the st-pa18 features a balanced line level input that may be connected unbalanced. The gain control range will accommodate standard unbalanced levels as well as professional balanced levels. The module bridges the input signal. Loop out terminals permit a balanced input to be fed to additional amplifier modules making the st-pa18 an ideal component in distributed audio system design. The loop out may also be used to feed a subwoofer amplifier see rdl st-cx2s subwoofer filter . The st-pa18 output will drive an 8 speaker or multiple speakers connected to present an 8 load to the amplifier and it is capable of driving 4 loads.
A red comp led is provided to indicate the threshold of the integral compressor. Audio levels that could cause the amplified output to clip are compressed according to two dynamic time constants. Normal audio level signals remain unaffected by the compressor thereby preserving audio dynamics and preventing the compressor from increasing feedback potential when the amplifier is used for paging. The compressor is designed to remain aurally transparent while maintaining clean unclipped amplified audio for input overloads of up to 20 db.
The st-pa18 produces average audio levels and audio clarity normally expected of amplifiers delivering much higher output power. The st-pa18 operates from an external 24 vdc 1a power supply sold separately. A power led illuminates when the module is powered. The module provides thermal a...
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