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Pioneer A-77X

Stereo Integrated Amplifier (1986)

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Pioneer A-77X


The A-77X was part of Pioneer's Elite series of hi-fi components. Features include a moving magnet and moving coil phono stage, low impedance driving capability, 3 power transformers and 7 power supplies.


Power output: 100 watts per channel into 8Ω (stereo)

Frequency response: 10Hz to 100kHz

Total harmonic distortion: 0.003%

Damping factor: 100

Input sensitivity: 0.2mV (MC), 2.5mV (MM), 150mV (line)

Signal to noise ratio: 70dB (MC), 88dB (MM), 108dB (line)

Output: 150mV (line)

Speaker load impedance: 4Ω to 16Ω

Dimensions: 457 x 155 x 427mm

Weight: 15.3kg

Accessories: side panel, side panel mount screw

Year: 1985


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re: A-77X

Hola...nesecito una ayuda con unas cajas akai sw176 q quiero comprar, que referencias tienen ,como es su calidad de sonido....yo escucho rock,metal y en general rock de los 70,80 y 90 ...Gracias

re: Pioneer Stereo Amplifier A-77X


I am new to this site, but I'm hoping somebody can help me.
I have a Pioneer stereo amplifier A-77X from the eighties.The switches on the front panel are starting to falter, resulting in an uneven and unreliable sound.
What can I do about that?
Is it possible to clean the contacts with contact cleaner and would that be the remedy, or what should I do?

Thanks for anyone's help,

re: Pioneer Stereo Amplifier A-77X

Spray some Deoxit on the inside of those controls will help out. Also check out Audiokarma.com, they can help out more.

re: A-77X

I bought my Pioneer A77x brand new in late 1985 and early 1986. I had to save money from three or four paychecks. I believe something is wrong with the power supply now and need to get it back in the rack. It is paired with a Denon turntable, Teac tapedeck, and a Pioneer equalizer pushing sound out of Bose 501 speakers. It took a few months to piece the system together only earning about $600 a month but the sound was worth the wait.


I got one sounds great.

This website is not affiliated with or sponsored by Pioneer. To purchase A-77X spares or accessories, please contact the company via their website or visit an authorised retailer.