Onkyo - Integra A-809 Solid state integrated amplifier

Output power: 105 watts per channel at 8 ohms (stereo)
Frequency response: 20 Hz to 20 kHz
Total harmonic distortion: 0.008%
Damping factor: 150
Input sensitivity: 0.16 mV (MC), 2.5 mV (MM), 150 mV (line)
Signal-to-noise ratio: 75 dB (MC), 94 dB (MM), 107 dB (line)
Output: 150 mV (line)
Dimensions: 455 x 170 x 420 mm
Weight: 16.7 kg

The Onkyo Integra A-809 is a top‑of‑the‑line stereo integrated amplifier built in the early 1990s (1991–1995). It belongs to Onkyo’s prestigious Integra lineup, known for its high‑quality internal components and robust “built like a tank” construction.
If you’re considering buying, restoring, or setting up this model, here are the essential technical details and what you need to know about its performance:
Technical Specifications Highlights
• Output Power: 105 watts per channel at 8 ohms (RMS, 20 Hz – 20 kHz).
• Dynamic Power: Capable of delivering more than 300 watts per channel at 2 ohms.
• Damping Factor: 150 (at 8 ohms), ensuring excellent control over speaker cones and very tight bass.
• Signal‑to‑Noise Ratio: 107 dB (line), providing an extremely quiet and interference‑free background.
• Transformer: Equipped with Onkyo’s proprietary AEI (Anti‑Electromagnetic Interference) technology to reduce magnetic noise.
• Weight: About 16.7 kg (37 lbs), reflecting its reinforced chassis and heavy components.
Connectivity and Features
• Audio Inputs: Supports up to 8 analogue sources, including CD, Aux (1 and 2), DAT, and two cassette bays (Tape 1/2).
• Premium Phono Stage: Includes a built‑in selectable phono preamplifier for MM (Moving Magnet) and MC (Moving Coil) cartridges, ideal for vinyl enthusiasts.
• Source Direct Mode: Allows you to completely bypass tone control circuits (bass/treble) and balance, ensuring the shortest and purest signal path possible.
• Speakers: Connections for two pairs of speakers (Speakers A / B) and a dedicated headphone output.