hifi engine

Manual Library / Pioneer

Pioneer A-77X

Stereo Integrated Amplifier (1986)

add a review add a review

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


schematics   English -

service manual   English - tri-comp

Related Catalogues

Audio Video Lineup

HiFi Components

If you have any problems opening files please read the download FAQ. All files are provided under strict licence and reproduction without prior permission or for financial gain is strictly prohibited.

If you have additional documentation please consider donating a copy to our free archive.


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.