Pioneer - A-209R Solid state integrated amplifier

The Pioneer A-209R is a vintage stereo amplifier with a power output of 35+35 Watts RMS and high-fidelity audio characteristics.

Key features
Output power: 35 W + 35 W RMS into 8 ohms, with total harmonic distortion (THD) of 0.1% at 1 kHz
Input sensitivity: 150 mV RMS at 1 kHz for MM PHONO input
Signal-to-noise ratio: 85 dB (for MM PHONO input at 5 mV)
Input impedance: 50 kΩ for MM PHONO
Frequency range: extended to ensure linearity and audio accuracy across the entire audible spectrum
Tone controls: adjustable BASS, TREBLE, BALANCE and LOUDNESS, with a flat center position for neutral sound
Protection system: built-in protection circuit to safeguard the amplifier and speakers
Power supply: standard AC input via IEC connector, T5A fuse included
Additional features: compatibility with Pioneer remote controls for control of other components, TAPE 1/CD-R/MD REC OUT and PLAY IN jacks, TAPE 2 MONITOR
Audio technology: Direct Energy MOS for stable and linear amplification, with a flat damping factor across the entire audio range
Construction: rugged chassis with a fixed stabilizer to reduce vibrations and ensure powerful, stable sound

Additional notes
The amplifier supports standard line inputs and MM PHONO, with the option to bypass the tone circuits via the DIRECT button. It is designed to deliver optimal performance with standard-impedance speakers, maintaining a clear and detailed sound even at high volumes

These specifications make the Pioneer A-209R a versatile and reliable amplifier for vintage or modern audio systems, offering a balance of power, sound quality, and control features.