• Stereo Audio Power Amplifier
• 20 Watts RMS per Channel into 8 Ω – 40 Watts Total
• 15 Watts RMS per Channel into 4 Ω – 30 Watts Total
• Left and Right Unbalanced Phono Jack Inputs
• Switch-Selectable Stereo or Mono Operation
• Studio Quality, Aurally Transparent Compressor/Limiter
• Compressor/Limiter Controls Clipping
• Compressor Produces Maximized Average Output Power
• Compression Enabled Using Input Level Adjustments
• LED to Indicate Audio Compression Threshold
• Outputs Drive 4 or 8 Ohm Speakers
• High-Efficiency Class D Operation
• Thermal and Short-Circuit Protection
• TX-PA40D includes North American Cord; TX-PA40DE excludes Power Cord

https://www.rdlnet.com/downloads/datasheets/tx-pa40d.pdf