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Secret Sound SA202 with Power Supply


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Product Overview

SA Series – 20-Watt Per Channel Class AB Mini Amplifier

The SA202 and SA202-RDT are 20-watt per channel (4 ohm) Class AB amplifiers with maximum gain of 35 dB. Input options include dual RCA jacks and a stereo mini jack for line-level audio sources and a speaker-level (amplified) input for applications with low-wattage speaker outputs (e.g., AV projector to external speakers). A 15-volt power supply is included with the SA202-RDT. Mounting hardware is included and adapts to pole, surface or security attachment installations.


Small and cost-effective, the SA202 is engineered for external amplification with SoundTube FP sound-focusing and other high-fidelity speakers. Additional applications include digital signage, education, point of purchase, museums, surgical centers, AV carts or any application where a small amplifier is needed to boost a limited source output (e.g., computers, A/V projectors, etc.).


  • 35 dB maximum gain with 2 x 20 watt output
  • Dual RCA, stereo mini jack and high-level inputs
  • High pass filter at 120 Hz (12 dB per octave) to reduce bass distortion in smaller speakers
  • Aluminium housing with integrated heat sink
  • Power inputs include either three-pin Euroblock or barrel connector
  • 12-volt trigger for automatic on/off functions when source power is detected
  • Included accessory: universal pole- and surface-mount adaptor
  • Included SA202-RDT accessories: universal pole- and surface-mount adaptor, 15-volt power supply
  • Optional accessory for SA202: 15-volt, 3-amp power supply (AC-PS-1530-RDT)


  • System Type: 20-watt per channel (4 ohm) Class AB amplifier
  • Frequency Response: 20 Hz - 20 kHz (+/- 0.1 dB)
  • Max gain: 35 dB
  • Power per channel @ < 10 % THD: 20 watts (4 ohm stereo) 10 watts (8 ohm stereo)
  • Power per channel @ < 1 % THD: 15 watts (4 ohm stereo) 8 watts (8 ohm stereo)
  • Signal to noise ratio: 92 dB (100 Hz, 12 dB/oct, 4 ohm, A-Weighted)
  • Input impedance: 6 k ohms
  • High-pass filter (F3): 120 Hz; 12 dB per octave
  • Height: 31.2 mm (1.23 in.)
  • Width: 101.1 mm (3.98 in.)
  • Depth: 123.6 mm (4.86 in.) including connectors
  • Weight - amp and power supply (SA202-RDT): 0.59 kg (1.30 lbs.)
  • Weight - amp only: 0.25 kg (0.55 lbs.)
  • Shipping weight - amp and power supply (SA202-RDT): 0.70 kg (1.55 lbs.) 
  • Shipping weight - amp only: 0.34 kg (0.75 lbs.)
  • Packaging: One per box
  • Included accessories: 15-volt, 3-amp power supply (SA202-RDT only), high-power input wire and Euroblock power connectors, pole- and surface-mount adaptor
  • Optional accessory (SA202): 15-volt, 3-amp power supply (AC-PS-1530-RDT)
  • Regulatory - CE: Approved
  • RoHS: Approved

Product Downloads

  • SA202 with Power Supply Data Sheet PDF 0.2 MB
  • SA202 with Power Supply Installation Guide PDF 1.8 MB


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*Prices are in AUD, include GST and are subject to change. Please call National Audio for pricing and availability on the SA202 with Power Supply.