Vintage Sansui AU 9900 Integrated Amplifier Repair & Restoration Using Artificial Intelligence AI.

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  • Опубликовано: 25 дек 2024

Комментарии • 112

  • @sammaze2103
    @sammaze2103 Месяц назад +3

    I’m a 78 year old guy who has done technical work all my life! There are no short cuts ! You have to spend the time to clean controls. Years ago you didn’t have all these chemicals to help. You just used Contact Cleaner !
    Thank you for doing a Great job teaching people !

  • @bacarandii
    @bacarandii 2 месяца назад +2

    I have an AU 4900 (38 wpc) that I listen to more than anything else in my vintage collection -- and I rarely have to turn it up more than a quarter of the way to make the windows rattle. (I listen mostly to acoustic jazz and stuff recorded in the '50s-'70s, so I don't need or want to listen at more than 60-70 dBs.) I play Roon through a Cambridge Audio DAC hooked up to the AUX input. It's like a time machine -- the way I always felt "hi-fi" was supposed to sound.

  • @audiophool864
    @audiophool864 9 месяцев назад +3

    I am glad someone is giving Sansui the credit it deserves. In terms of Japanese hifi only Luxman and Accuphase actually built equipment that beat Sansui. But Sansui was a lot more affordable.

  • @josephnavarro3620
    @josephnavarro3620 7 месяцев назад +3

    You make great videos. Not even sure how I stumbled on to vintage audio videos but your videos got me wanting to go look at thrift stores and garage sales and break out some electronics tools. Thank you.

  • @thomasturner8064
    @thomasturner8064 Год назад +6

    Bought mine 30 years ago for $75 bucks. Still one of the best stereo pieces I've heard. Currently using a Pioneer 1010 receiver but bound to hook the Sansui back up soon.

  • @zukispur5493
    @zukispur5493 Год назад +2

    I'm a SANSUI AU 717 man myself. Elegant beast. Had her re capped recently (SANSUI glue) cost me around £600 and well well worth it.

  • @curtwow
    @curtwow Год назад +4

    3 cups of coffee was all it took. I really truly appreciate the time you take to put these together. I'm starting down the repair side of this hobby after collecting for 15 years. I wanted to let you know that you gave me the confidence to do this. I recapped and replaced all the known problematic transistors on my Sony Ta-2000f. It's working amazing but, there's an issue in the muting circuit I'll tackle one of these days. For now, I just shut the amp down first. Really truly sincerely, thank you!

    • @vintageaudioaddict
      @vintageaudioaddict  Год назад +2

      Your welcome and thank you so much for your kind words. It's truly appreciated.

  • @cjsvinyl
    @cjsvinyl Год назад +6

    Chris, I have to give you *HUGE* props not just for the Legendary AU 9900, but making the step to installing ChatGPT on your system. I literally just signed up for it earlier today. I could only dream of this amplifier. A friend of mine had 4 Cerwin Vega AT-100's all powered by his Sansui AU-9900! It's a tank!

    • @vintageaudioaddict
      @vintageaudioaddict  Год назад +1

      Thanks so much for watching, CJ. She truly was built to last. As you know I enjoy the old electronic stuff but I also try to stay up with the times. The artificial intelligence stuff is pretty cool.

    • @incredifunk
      @incredifunk Год назад

      At100? Vega AT 's are named by their size of woofer as far as I know.. mine are AT12.. hence 12" woofers

  • @Cyberbronco
    @Cyberbronco Год назад +8

    After that intro started, I thought I was logged into Netflix!

  • @danlivni2097
    @danlivni2097 Год назад +2

    The matching Tuner, Sansui TU9900 was also amazing. That tuner was built

    • @vintageaudioaddict
      @vintageaudioaddict  Год назад

      Yup, Sansui made some great audio equipment back in the day.

  • @kinsoncooper7333
    @kinsoncooper7333 Год назад +1

    After all that, H.H. Scott got their friends in high places to even the playing field and still went out of business...🤔
    Great video Sir, well done.

  • @m.j.morshead
    @m.j.morshead 9 месяцев назад +2

    Definitely my favorite style and look when it comes to the vintage amps,i was limited with funds and couldn't afford anything to high end so i settled on the black face sanyo DCA 401 rack mount style.not exactly a high end amp but it serves my needs perfectly and the sound is pretty decent.🇭🇲👍

  • @Zzz-lz9kb
    @Zzz-lz9kb 10 месяцев назад +1

    Thanks so much. Long Live Sansui!

  • @drumzRfun1
    @drumzRfun1 11 месяцев назад +1

    My friend's older brother had this amp with Bic speakers and turntable. I've never heard Led Zeppelin sound as good at ear piercing volume.

  • @bmboldt
    @bmboldt Год назад +3

    I want to thank you for the videos. Your production keeps getting better and better. Your videos aren't just educational, they are becoming entertainment. I have a BS degree in Elec Eng but wrote software my whole career. Getting back into electronics again and I have recapped two receivers. I wish it was easier to find affordable equipment to restore. Maybe I need to reevaluate how much I need to spend on units that need work.

    • @vintageaudioaddict
      @vintageaudioaddict  Год назад

      Your welcome. Thank you for the kind words. The production/video editing has become a hobby in itself for me. Putting the video's together take longer then the repair/restorations. Like everything in life.....Practice practice practice. Ya, the prices have got pretty high over the past few years. You really have to search for deals. I always enjoyed "screwing around" with writing software. I just wasn't all that good with it.

  • @406ed
    @406ed Год назад +1

    Great videos and explanations of the work you're doing. I enjoy watching. Once in awhile, I can almost hear you saying, "we'll leave the light on for ya"

  • @MrDoneboy
    @MrDoneboy Год назад +2

    Right in my stereo time zone...Thanks, again Chris!

  • @RoyArmy-WREW918
    @RoyArmy-WREW918 Год назад +5

    Hmmm... you have me thinking about the Sansui AU-X1 and T1 DC (Direct-coupled) pair I bought in 1978 in Misawa, Japan. The last time I tried to power it up, the start-up relay would not work. I loved the fact I could run a Moving Coil Phono cartridge and had a freq response of 5-50K. It also had no tone controls as it was designed to run an Equalizer as well. Am thinkin would love to have that brought back up. I do remember getting the service manual with everything I purchased at that time.

    • @vintageaudioaddict
      @vintageaudioaddict  Год назад +1

      Oh Man, great gear! It would be wonderful if you could get them up and running.

    • @RoyArmy-WREW918
      @RoyArmy-WREW918 Год назад

      @@vintageaudioaddict My thoughts exactly

  • @brainache555
    @brainache555 Год назад +1

    I respect the NAD approach to their rated wattage.

  • @tomb375
    @tomb375 9 месяцев назад +2

    WOW AWESOME video!!! Also great job to Markus Fuller!

  • @Gabrielishere
    @Gabrielishere Год назад +2

    I'm just glad someone (you) finally mentioned that new, stupid Deoxit straw 😂 The most annoying part about that straw for me is how it keeps dripping after I spray anything with it

    • @vintageaudioaddict
      @vintageaudioaddict  Год назад

      Ya, good point. You got to wonder why they changed the design.

  • @markoverton5858
    @markoverton5858 Год назад +2

    Awesome vlog thanks for your effort to enlighten us, and the story of the equipment origins history ,👍👏👏👏👏👏👏👏

  • @fornowok
    @fornowok Год назад +2

    Chris, THANK YOU so much!!! I have an AU 11000A and hung in there right to the end. Loved every minute as well. I'm already a subscriber but I did give you my big thumbs up, you deserved it for sure. You have a great day too and thanks again. Mine was just rebuilt five years ago so fingers crossed and I'm 62 now, maybe it out lasts me.

    • @vintageaudioaddict
      @vintageaudioaddict  Год назад

      Your welcome. Thank you for watching. Enjoy you 11000, wish I had one.

  • @pongyang8705
    @pongyang8705 9 месяцев назад +1

    Fantastic video! Earned you a new subscriber!

  • @billmilosz
    @billmilosz Год назад +1

    1:04:13 The Peak DCA75 is an amazing gizmo. And so reasonably priced! In addition to the info you get from the LCD display, one can get all kinds of data from it using a PC and USB connection - families of curves, etc etc.

  • @Pavel-g6j-d7n
    @Pavel-g6j-d7n Год назад +1

    Отличная работа коллега!

  • @ZookLife
    @ZookLife Год назад +1

    Great video Chris! ❤

  • @kylesmithiii6150
    @kylesmithiii6150 Год назад +2

    This is a great video and superb work! Thank you!

    • @vintageaudioaddict
      @vintageaudioaddict  Год назад +1

      Thank you so much for your kind words. I really appreciate it.

  • @chabinathramkissoon1295
    @chabinathramkissoon1295 16 дней назад

    I owned one of this Sansui amplifier , on the 1st of October 1981 all of the electronic equipment was stolen. All the thieves left was a Studer A77 half track reel to reel recorder.

  • @nathanzimmerman5846
    @nathanzimmerman5846 Год назад +2

    Loved the video intro Chris! Great job as usual on the rest of video as well. When you talked about including AI (Chat GPT) I was like Wow! That’s so cool! As I have gotten older, now I have noticed peoples perception of me has changed. They seem to think because I’ve gotten older that I’m close minded to new ideas. It is my belief that no matter what your age is you’re never too old to use innovative, new technologies, and ideas to solve problems and create new things.

    • @vintageaudioaddict
      @vintageaudioaddict  Год назад +1

      Thanks for watching! ! I'm with ya Nathan about learning. I'm hoping it holds off Dementia for a while, lol.

  • @frankgeeraerts6243
    @frankgeeraerts6243 Год назад +1

    Thanks for the beautifull story ............................Hashimoto transformers sare still outstanding !

  • @axxxxman
    @axxxxman Год назад +1

    perfect timing I have just started looking for an AU-9900, this one may cause me to sell everything and just have 1 system. Hopefully it won't come to that. It just looks like a wonderful piece of equipment to work on.

    • @vintageaudioaddict
      @vintageaudioaddict  Год назад

      Don't hesitate if you find one. It's a wonderful integrated amp. Thanks for watching.

  • @stigrostrupchristiansen5116
    @stigrostrupchristiansen5116 8 месяцев назад

    Thanks ! You really helped me out!😊

  • @netlogic1ify
    @netlogic1ify 8 месяцев назад

    Hello, about the bias adjustment, do I disconnect the red wires from pins 01 and 06 on the F-2566 and connect them in series on milliamps mode? i.e. 01 and 06 with two multimeters. Thank you.

  • @andreasklabis7706
    @andreasklabis7706 10 месяцев назад +1

    Bei HiFi Engine: Versuchen Sie es mit "Password vergessen", sollte dann klappen. 😊🇩🇪

  • @brucetungsten5714
    @brucetungsten5714 Год назад

    Quite the video - THX!

  • @carloca71
    @carloca71 Год назад +1

    Noticed some new stuff at aliexpress, dual smd transistors, they are quite cheap but the range is small, BC847, MMDT5401 high voltage, MMDT3906 (2n3906), MMDT5551, MMDT3904 and a curious MMDT3946 that is a 2n3904 + 2n3906 in the same package. It may have some utility to fix vintage equipment uses double transistors. I suppose they are quite well matched.

    • @Gabrielishere
      @Gabrielishere Год назад +1

      Watch out for counterfeits... I've had it happen. That's why I only use Digi-key, Mouser, or known and trusted sources...

    • @carloca71
      @carloca71 Год назад

      @@Gabrielishere True, I guess you get those from trusted sources too.

    • @Gabrielishere
      @Gabrielishere Год назад +1

      @@carloca71 I could never figure out why someone would counterfeit these tiny parts, but I guess it is quite lucrative, scamming people and ruining their electronics. Horrible.

    • @carloca71
      @carloca71 Год назад +1

      @@Gabrielishere This ones are quite cheap and common, never got counterfeit SMDs for that kind of devices. May be cause they are not trendy or party of the sacred devices group for "high end audio" like some op-amps and jfets :-) Hope we can find cheap and trustable replacements for the faked ones.

    • @carloca71
      @carloca71 Год назад +1

      Just checked Mouser and found 537 references for dual bipolar transistors in SMD packages, didn't know it was been made. Probably to save space but it may benefit us, found 25 dual jfets too, some quite cheap < 1$ per unit.

  • @sidesup8286
    @sidesup8286 Год назад +2

    When I had a Sansui receiver (the G Series from the late 1970s) I liked it on phono until I upgraded to Carver. I relegated it to a secondary room and to my surprise, it's bright and brittle highs actually sounded better than the Carver on dullish cassettes. Synergy I guess.

    • @vintageaudioaddict
      @vintageaudioaddict  Год назад +1

      Yup, Synergy and our individual ears makes up what we like to hear.

  • @moodyga40
    @moodyga40 Год назад +1

    nice amp to work on fixed few the amp is as old as me Sansui 111 is the best amp

  • @arnoldtolker3505
    @arnoldtolker3505 Год назад +1

    WOW!🙂

  • @zaharzahar895
    @zaharzahar895 9 месяцев назад

    it's the solide and the Best amplifier in the World

  • @garygranato9164
    @garygranato9164 Год назад +1

    thanks chris

  • @netlogic1ify
    @netlogic1ify 8 месяцев назад

    Hello, after testing the bias current the right channel is OK (50mA) but on the left channel I can't set it to the correct value and it's between -15mA to -7mA. What can cos this problem except bad power transistor? Is it can be just a bad capacitors?

  • @Lyle_E_Coyote
    @Lyle_E_Coyote 11 месяцев назад

    Hi, I bought my AU-9900a from a smoker. Volume output was really low so I thoroughly cleaned every single connection point the unit had inside. The volume level and all inputs have seem to be restored to normal output levels with the exception of the phono stage - it still seems to have really low output compared to the others. Any suggestions?

  • @chinmeysway
    @chinmeysway 6 месяцев назад

    i watched this while go. remind me, do these have option to using 120v usa power? thanks for your awesome vids of

    • @sheepfeeder
      @sheepfeeder 4 месяца назад

      Yes there is a jumper under the top cover.

  • @morrisonAV
    @morrisonAV Год назад

    Hey Chris, given the clues you found (numbers written on connectors, etc.) were you able to determine what had failed or been worked on before you got the unit? Also, did you test the output transistors while you had them out? Results?

  • @MacStoker
    @MacStoker Год назад +1

    ive still got an old sansui amp, for my second room, sounds lovely..
    but literally needs a slap now and then lol (sorry folks).. i really must take it and get it fixed. its been great to me for years...

    • @vintageaudioaddict
      @vintageaudioaddict  Год назад +1

      If you get her fixed up there's a good bet she will operate well for many more decades.

    • @MacStoker
      @MacStoker Год назад

      @@vintageaudioaddict you convinced me to do it watching the video... cheers mate

  • @kylesmithiii6150
    @kylesmithiii6150 Год назад +1

    Hi Chris. At 1h15m you talk about a glue used in the factory to hold large components in place for soldering purposes. I think your theory is correct, but the glue may also be used to hold large/heavier components in place for transportation purposes. For instance, a large capacitor or transistor with a large heatsink without the glue would be under constant stress in its soldering points while in the cargo area of an airplane from Tokyo to LA or NY. There would exist constant stress in terms of resonance and vibration causing some points to eventually crack, visible by the naked eye or not. Dave Jones did a bench test specifically on that in this video: 'EEVblog 1442 - DON'T DO THIS! (PCB Vibration Testing)'. Regards,

    • @vintageaudioaddict
      @vintageaudioaddict  Год назад +1

      Thanks for commenting. Sure, that make's sense to me. There may be more than one benefit to applying the glue. Thank you again for the info.

  • @fojikotoledo3742
    @fojikotoledo3742 Год назад

    Hi Cris very informative video thank you..Can i send you my AU 9900 for restoration..?

  • @MrFARTSANDWICH
    @MrFARTSANDWICH Год назад +3

    Sansui equipment has a higher yield return per year than gold silver platinum or Palladium

  • @eighteenin78
    @eighteenin78 11 месяцев назад

    Comparing the AU-9900 with its next smaller sibling the AU-7900 is interesting. The AU-7900 is the top amp of its litter (of medium tier amps) and looking at the specs, is virtually identical to the AU-9900 except for a difference of 5 watts per channel which at 75 vs 80 watts is not audible. I have never heard an AU-9900 that I can recall, but I wonder if it differs at all from my AU-7900 which I have. The electronics of the 7900 is almost the same (user features) packed into a smaller box.

  • @ole9421
    @ole9421 Год назад

    I was hoping you'd talk about the difference in the volume controls between the 9900 vs 9900a. Logarithmic vs linear.

    • @vintageaudioaddict
      @vintageaudioaddict  Год назад

      Thanks for watching. Never have had a 9900A in my collection so I don't have any experience with the volume control differences.

  • @cooper6086
    @cooper6086 Год назад +1

    👍

  • @jankro1
    @jankro1 3 месяца назад

    I have had good luck with chinesium under 10$ component tester

  • @nikmills
    @nikmills 15 дней назад

    I have two working sets of the separate versions of this amp; the BA-2000 and CA-2000. One BA-2000 power amp gets very hot. Almost too hot to touch. I'm hoping to find someone most anywhere in the USA (preferably in the NE) who can help fix this unit. Anyone here have any leads to a good repair person?

  • @diyamplifiertvt457
    @diyamplifiertvt457 10 месяцев назад

    tuyệt vời

  • @fallacyfallacy5307
    @fallacyfallacy5307 Год назад +1

    I bought a Sansui integrated amp in 1975. It wasn't this one though.

  • @Synthematix
    @Synthematix Год назад

    I always preferred the sound of the old SONY amps tbh

    • @vintageaudioaddict
      @vintageaudioaddict  Год назад

      Sony made some great audio gear back in the day. I have a bunch in my collection. Thanks for watching.

    • @Synthematix
      @Synthematix Год назад

      @@vintageaudioaddict Ive got an old Sony TA-636 beautiful sounding old girl she is

  • @Alex_441
    @Alex_441 Год назад

    I gave this video it's 666th like 😈

  • @jankro1
    @jankro1 3 месяца назад

    It still says registration permanently disabled

  • @cjay2
    @cjay2 Год назад

    There's manuals lib website. This platform doesn't allow me to print links.

  • @Foxrock321
    @Foxrock321 Год назад +1

    Yup, HiFi wouldn’t let me re-register I registered years ago

    • @vintageaudioaddict
      @vintageaudioaddict  Год назад

      Man, as I said that really stinks. Hopefully they start letting folks signup again.

  • @legomandk9964
    @legomandk9964 Год назад

    I had the Au-9900. I find it a little boring. Build like a tank, but I like my Au-919 much better.🤗

    • @vintageaudioaddict
      @vintageaudioaddict  Год назад +1

      Lots of great gear from back in the day. Sometimes it's hard to choose.

    • @legomandk9964
      @legomandk9964 Год назад

      @@vintageaudioaddict Yes 🤗

  • @scottjohnson921
    @scottjohnson921 Год назад +2

    I just signed up for a new account on Hi-Fi Engine.

  • @tee-jaythestereo-bargainph2120
    @tee-jaythestereo-bargainph2120 Год назад +1

    Thanks For the Video , Prime Hifi Conor Just Master Restored my Au717 to an insane level ! His video is posted check him out ' He also added 5 way binding post and Power Iec ' and he buffed out all Rca Jacks every single electronic componete was changed out for better conponetes ' all boards reflowed check him out thanks for the video

    • @vintageaudioaddict
      @vintageaudioaddict  Год назад +1

      Your welcome. Hey Man, it's been a while. Thanks for commenting. Okay, I'll check out the video of your AU-717.

    • @tee-jaythestereo-bargainph2120
      @tee-jaythestereo-bargainph2120 Год назад

      @@vintageaudioaddict The young man is very talented be cool if you left him a comment Conor watches your channel as well ' As i was heading out to work the UPS arrived with Sansui 😥 Can't wait to try out !! Conor used alot of good conponetes with Low ESR Nippon Chemi Cons ' Nichicon Muse Many Wimas ' And He is only 23 years old !!!!
      Airplane Engeener Audio Resto is his hobby 😃 Can't wait to hook up my new Dynoaudio Tower speakers 😃

    • @tee-jaythestereo-bargainph2120
      @tee-jaythestereo-bargainph2120 Год назад

      Appricate all you do !!

  • @carlrudd1858
    @carlrudd1858 Год назад

    Too much repetition and digressing. You obviously know what you're doing, but this 2+ hour video could have been half that length and much easier is take in. But otherwise, very thorough and thoughtful.

    • @donovanweber6059
      @donovanweber6059 11 месяцев назад

      STOP BITCHING!
      I couldn’t disagree more - I’m sure that I represent more than myself when I say I find what you call repetition to actually be “thoroughness” , and what you call digression I find to be extra information that’s both entertaining and educational. It takes a lot of effort and dedication to put together a decent video (and this video is much more than decent if one judges it by others of the same ilk) let alone a collection of videos and eventually a channel = when someone picks at it the way you are - because it isn’t perfect - the impression I and a percentage of whoever reads your comment are going to get is of a person with a “selfish attitude and an unfriendly nature” . Constructive criticisms never have to be rude or even blunt and before you try and pull the card “what are you some kind of Karen who needs it sugarcoated” ? Don’t bother . That’s just a pathetic ripoff of something very real and eerily familiar - it should be since it’s another similar type of selfish individual with an unfriendly nature. If you want something perfect I say go make it yourself and I will support your effort = if I’m able to find out you put out a video because you wanted a better product then I’ll support it and you and I’ll even officially apologize . The fact is so far everyone that complains , well that’s all they do and nothing else. Yet I have no right nor desire to say your that type of person , maybe you are a perfectionist which I can be myself sometimes and it’s hard not to be a bit unfriendly when your in that mode. Or maybe even you were just in a bad mood and fired off a mostly meaningless rude comment……….in which case socially speaking you’re a far cry better person than what I was thinking . I say socially because none of this is meant to condemn you for the person you really are so much as to bring your attention to the bluntness of your nature and the negative impression it makes . maybe your a great person who fired away with an offhand comment he thought was unimportant or even possibly didn’t think it rude at all in which case your only guilt is of ignorance but that my friend isn’t at all the impression your comment made . Something to think about . Peace .

    • @donovanweber6059
      @donovanweber6059 11 месяцев назад

      I’m forced to eat crow here because really I’m the one being a ass simple as that - I read the first line of your comment and like an irresponsible kid put together a smart ass comment intending to bring your attention to your ignorance and in reality I guess I was actually talking about myself . I still disagree with you but that is all nothing and I mean nothing else applies . I sincerely apologize to you sir!

  • @elvispresley2695
    @elvispresley2695 Год назад +2

    I have found manualslib and manuallib for SOME systems

  • @johnbowick7109
    @johnbowick7109 Год назад

    I’m a novice vintage audio enthusiast, I did do aviation ET calibration and Maintenance back in the 80’s on an aircraft carrier. But, I have found the info I needed to do the basic alignments on all six of my JVC integrated amps from ‘78 and ‘79 at “AUDIOSERVICEMANUALS”. I don’t even down load them, just print the pages I need.