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Sansui AU-777A vs all contenders

Discussion in 'Exclusively Sansui' started by smurfer77, Nov 14, 2016.

  1. smurfer77

    smurfer77 AK Subscriber Subscriber

    Messages:
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    Took some decent pics of the AU-777A this week. Here is a sample. She is looking and sounding fantastic... not bad for a machine just shy of 50 years old.

    [​IMG]
     
    Last edited: Mar 22, 2018

     

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  2. Dave_1962

    Dave_1962 Lunatic Member

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    Hell yeah
     
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  3. stereofun

    stereofun Super Member

    Messages:
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    My favorite all-time documented resto, but I am biased. Love the 777a - its old school looks and sound to match. :thumbsup:
     
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  4. roger2

    roger2 . Subscriber

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    indiana
    beautiful photography smurfer77
     
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  5. bsandovalb

    bsandovalb AK Subscriber Subscriber

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    Costa Rica
    :whip: who has one au777a for sale??!!.... makes me wanna grab one badly!! :naughty::naughty:
     
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  6. Hipocrates

    Hipocrates Anti-Muppet Subscriber

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    Stick with your Pioneer/Marantz, Sansui is too good for ya!:rant:
     
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  7. Yellowyoda

    Yellowyoda New Member

     
  8. Yellowyoda

    Yellowyoda New Member

    A real beauty Smufer- one day I hope to do the right thing by my untouched Au777. Did you just recap and service or did you go down the modification route?
    I just bought a Sansui 555a from an Aker- he told me he just recapped and I have to say it sounds marvellous.
     
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  9. bsandovalb

    bsandovalb AK Subscriber Subscriber

    Messages:
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    :jump:

    Ok ok... better keep listening to my g8000 until I can "upgrade" to the au777a :beatnik:
     
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  10. smurfer77

    smurfer77 AK Subscriber Subscriber

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    Hi Yellowyoda, sorry I haven't replied yet to your PM... I'm really burried in work at the office and at home these days and I find it hard to trouble shoot other peoples amps without having the device in front of me to play around. About the AU-777A the details are in this thread here; the AU-777A requires absolutely no circuit modifications and sounds amazing in stock form. The only 'mods' I did were with 'upgrading' a few caps and a mod underneath to move some hot resistors off of a PCB.

    HAHA. I have never heard a G8000... i bet it is no slouch!
     
  11. corbin

    corbin Active Member

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    429
    I wonder how an early solid state Pioneer, e.g. SX-828 (1972; direct coupled) or SX-1500TD (1970; cap coupled)... would fare? Trying to decide which of the early solid state cap coupled receivers I'd like to try... hopefully something warm and tubelike.
     
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  12. smurfer77

    smurfer77 AK Subscriber Subscriber

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    Honestly, I suspect that many late 60s and early 70s models from various brands are nice sounding units. At that time many brands were really trying hard to show that solid-state can 'do the trick' and quality of construction was valued highly back then too. The Yamaha and Sony units I tested from the era did very well (to be fair, i hand picked exceptional models), and I don't see why an early Pioneer and other brands wouldn't also have some nice models.
     
    Last edited: Apr 26, 2018
  13. RS65

    RS65 New Member

    Messages:
    14
    Location:
    NorthWestGermany
    awesome photo ;-)))

    My AU-777a has 4700uF/80V Nichicon-coupling caps now, my AU-222 4700uF/50V. Both are wonderful sounding, i think a better sounding amplifier is really hard to find.

    [​IMG]

    I checked the frequency response with my Test System. I think it is not so bad...

    [​IMG]

    Greets Rainer
     
    Last edited: Jun 7, 2018
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  14. smurfer77

    smurfer77 AK Subscriber Subscriber

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    The output coupling caps in these amps is one of the biggest factors in the sound of these amps. I played with different coupling caps and the differences were wild (with the most expensive caps btw being the worst... no bass at all).

    I love that your AU-222 now has 4700uF nichicon coupling caps!!! I will one day get around to my AU-222 for some further upgrades (I already played with the small signal semiconductors but haven't touched the caps)
     
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  15. RS65

    RS65 New Member

    Messages:
    14
    Location:
    NorthWestGermany
    I am just waiting for a delivery from Mouser. 10xNichicon 6800uF/63V, one for the supply (Au-222) instead the 4700uF-Nichicon (Original Elna 1500uF/60V). After that i will post a Photo with the changes.

    Last week i bought a Sansui 350 Receiver and a second nice Sansui TR-707E(1965) total original, fully working and with all original Caps and Transistors, sounding wonderfull and with a more powerfull bass as the 777a, but also more noisy.

    I like the 350 too, it has the same PowerAmpBoard and power supply like the AU-222, and in the bigger case, there is much more place for bigger recapping.
     
    Last edited: Jun 7, 2018
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  16. corbin

    corbin Active Member

    Messages:
    429
    A lot has changed in my setup since my last post... ended up getting a Sony from the era you mention as you can see in my signature. I enjoy the sound very much and suspect it is quite similar to your AU-777a.
     
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  17. RS65

    RS65 New Member

    Messages:
    14
    Location:
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    Here they are:

    [​IMG]

    [​IMG]

    With these mods the AU-222 sounds really powerfull, i have to test it against my AU-777a and my just this weekend ready restored Modell 3000 (4x10000uF, totally reapped and all Bulletin Mods for safe operation. I only have checked it today for a few minutes after biasing with my DT-880, sounds nice too.

    Just one naked of the Modell 3000 from the top

    [​IMG]

    Greets Rainer
     
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  18. afroaudio

    afroaudio Active Member

    Messages:
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    Location:
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    Great thread, love to hear more comparisons... I still have not heard much about the differeneces between the AU777 and AU777a.. (I am busy recapping a 777 at the moment) Also have 555, 555a, 999 and 717 all recapped now.. love switching these in and out.. no out n out favourite as of yet. Also where can one find these Sansui service bulletins? HAve not seen them anywhere on the net.
     
  19. slimecity

    slimecity Super Member

    Messages:
    2,881
    Location:
    New Zealand
    I am expecting a partly-restored 555a to arrive at my door any day now. An old fella was retoring it then he died, his son is selling off his stuff. I suspect I may need to do a bit of reverse engineering as he had ordered some cheap 'n shitty caps to put in there.....

    I will be focussing on the output caps in my 555a to get best results - is there a consensus on brand & value for best results?

    Also - dont forget @Leestereo's recent thread on restoring a 555a to a really high standard (and also making some mods like a Baxendall mod whatsit to reduce distortion) - I will be following that as I have had two 555a's before and sold both of them - however this time I reckon I can get some really great sound out of one!
     
  20. kevzep

    kevzep Its all about the Music

    Oh so you got that one....I wondered who was going to end up with that...
     
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