STS-A31 - Speech System Amplifier
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List Price £212.98 incl. VAT
Contacta - STS-A31

Speech System Amplifier

Induction Loop Facility
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Product Description

The STS-A31H Speech Transfer Amplifier System is compatible with all Contacta's Speech Transfer products.

The STS-A31H is full of consumer-friendly features which pack a punch: continuous self testing, energy-saving “green” standby mode saving 80% power, advanced signal processing for speakers and induction loops, constant-current loop drive (with adjustable loop drive level), ohmically isolated line level audio input or output to recording system, LED indicator of power/status, continuous self-testing for smooth functionality with other products.

*Please contact the CIE office on T01159770075 for information on related products and accessories.

Specification Sheet

  • Energy-saving ''green'' standby mode is automatically used, achieving a power saving of up to 80%
  • Advanced digital signal processing for speakers and induction loop
  • Constant-current loop drive (with engineer adjustable loop drive level)
  • Isolated audio line input / output allows additional ohmically isolated line level audio input or output to recording system (factory options, not available together)
  • LED column indicator aids adjustments and indicates power and status
  • Continuous self-testing means that no specialized equipment is required to confirm functionality
  • DC Power: 2.1mm DC jack
  • Power and status indication: Green/red LED column
  • Full open duplex communication
Description STS-A31
Supply Voltage 12 - 14v DC
Quiescent Current 100mA typical
Operating Current 2A typical on speech peaks
Power Switch Push on - push off (tact switch under membrane
Microphones Electret, supply 5V via 2.2KΩ load resistor
Speaker Output Power RMS: 2.5W / 8Ω, 4.4W / 4Ω
Loop Drive Compliance Constant current, bounded by 4V RMS & 2A RMS
Total Harmonic Distortion Less 5% (Loop and Speakers)
Construction ABS Plastic Construction Housing
Finish Matt Black Fine Texture
Dimensions 115(W) x 116(H) x 40(D) mm
Weight (Net) 0.10kg
Weight (Gross) 0.30kg
  • UVDB Registered
  • PLASA Member
  • Member of BESA
  • BSI 9001
  • ISCE supporting member