<style> .wpb_animate_when_almost_visible { opacity: 1; }</style> SF-PA50A | 50W Mono Audio Amplifier - 70V or 100V | RDL, Radio Design Labs | ATR/Treehouse

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50W Mono Audio Amplifier - 70V or 100V

Model: SF-PA50A

  • 50 Watts RMS constant voltage amplifier
  • 70V or 100V Output
  • Plenum rated per UL 2043 Standard
  • Analog balanced Mono Input or unbalanced stereo mini-jack Input
  • Adjustable gain with dual-LED VU metering
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The SF-PA50A is a 50 Watt audio power amplifier that converts one analog input to a 70 V or 100 V constant voltage amplified output.

An analog audio source may be connected to either the mono balanced terminal block input or to the unbalanced Mini-Jack which sums the left and right channels to mono. Amplifier gain is set by the installer using a rear-panel single-turn potentiometer with an associated dual-LED VU meter calibrated to 20 dB below maximum power output.

The SF-PA50A is equipped with an internal VCA for setting the amplifier output level. A detachable terminal block provides for the connection of an external 10kohms potentiometer or a 0 to 10 Vdc control voltage. RDL remote controls are available to provide single-turn, multi-turn (rotary encoder) or pushbutton (ramp or fixed level selection) user level control. VCA control insures long term noise-free level adjustment.

The module is equipped with both thermal and output short-circuit protection. The high-efficiency Class D output stage produces minimal heat for all levels of expected voice or music modulation. Upon power-up and during overloads or overheating, an LED MUTE indicator glows yellow and the output is muted.

  • 50 Watts RMS constant voltage amplifier
  • 70V or 100V Output
  • Plenum rated per UL 2043 Standard
  • Analog balanced Mono Input or unbalanced stereo mini-jack Input
  • Adjustable gain with dual-LED VU metering
  • Automatically limits supply current to protect against power supply shutdown
  • VCA control on detachable terminal block
  • External control using 10kohms Potentiometer or 0 to 10Vdc
  • Compatible with RDL remote level controls
  • LED Indicators: Power, Amplifier Mute, Analog Input Level
  • High-efficiency Class D operation
  • Thermal and short-circuit protection
 
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