AU-9900 - Maybe The Best Ever! Sansui Integrated Amplifier Vintage Stereo Repair Audio Restoration

Sansui AU-9900 stereo integrated amplifier video showing the repair and restoration of this vintage classic audio equipment that was produced from 1975-1977. It has the reputation of being one of the best sounding vintage integrated amplifiers ever produced. I detail the complete restoration and repair process from the power amplifier section to the faceplate and knobs. I then show the procedure to check the bias current of the output transistors as well checking the DC offset. I then bench test this Sansui AU-9900 for maximum power output and total harmonic distortion(THD). I use a vintage Sound Technology ST3200A audio analyzer for measurements.

I am a hobbyist that repairs and collects vintage stereo gear. Every piece of equipment that you see in my video's is mine. I don't repair other people's equipment and then send them back to their owners. I repair, restore, and bench test every unit. I then install each unit into my own stereo system and do what they were meant to do. Play Music!

Other Classic Stereo Equipment Video's -

Sansui AU-9900 Part 1 -
Sansui AU-9900 Part 2 -
Sansui AU-9900 Part 3 -
Sansui AU-9900 Part 4 -

Pioneer SPEC-1 -
Pioneer SPEC-2 -
Nakamichi Digital -
Pioneer SX-1250 -
Pioneer A-27 -
Pioneer SX-1980 -
Sansui G-9000DB -
Pioneer Rack System -
Yamaha - CA-2010 -
Sansui Eight -
Sony EL-7 -
Luxman M-300 -
Scott 340B -
Marantz 2270 -
McIntosh 752 -
Marantz 23 -
Marantz 2385 -
SAE 2400 -
Nikko 440 -
Sansui CA-2000 -
Nakamichi LX-5 -
Kenwood Eleven III -
Pioneer SX-1050 -
Yamaha CA-2010 -
Sony TA-F6B -
Nakamichi Dragon -
McIntosh MC2205 -
McIntosh MC2505 -
Sony EL-7 -
Sansui BA-5000 -
Pioneer SX-1980 -
Nakamichi 1000 DAT -
Akai GX-220D -
Kenwwod Eleven III -

Troubleshooting Failures In Vintage Audio Equipment -

Vintage Stereo Repair -
Phono Repair And Troublesome Transistors -
Hakko 808 Desoldering Tool A Must Have -
Hazards Of Reel To Reel Tape Deck Repair -
No Audio In Vintage Equipment -
Troubleshooting In Vintage Equipment -
Reforming Speakers -
Checking DC Offset On Vintage Amplifiers -
Replace Old Electrolytic Capacitors -

Help For the Vintage Audio Fan -

Buying Vintage Audio? -
Finding A Technician -
Buy Vintage Or New Stereo Gear? -
Beware Of Vintage Stereo Ad's -

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