Sansui AU555a and Polk monitors Salvation Army find

Discussion in 'Exclusively Sansui' started by Dan887217, May 11, 2018.

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What’s better Au555a or 8080?

Poll closed May 18, 2018.
  1. Au555a

    50.0%
  2. 8080

    50.0%
  1. Dan887217

    Dan887217 Member

    Messages:
    66
    Hello everyone
    In the last two days I have found these at my local thrift store paid 35.00 in all. I think it was a good deal despite condition both items.
    The amp well I have one good channel it seems. I have only cleaned pots as I thought it was the problem of being dirty. Inside the unit was quite clean. I have not gone deep to investigate more and I have been looking on some threads to figure out what’s going on. Paid 29.99.
    The speakers need two new foams sounded good for what I could hear out of them. Paid 5.00 instead of 29.99.
    Now these speakers from asking around on fb I have been told are Polk monitors v.2.


    18E8CB3C-C808-461E-B1D0-84B713ECA78B.jpeg 542F3C59-8CE8-43CF-B63E-7576144D9A43.jpeg 76AD6895-7876-4B46-B454-3CF2AAF030CD.jpeg E16E4E15-A79B-4486-934F-52EDFD366766.jpeg 58365318-731F-4059-99EE-FB6839B40FDE.jpeg 3CBAF6F5-E16D-4902-80F7-D03B3CEFE65B.jpeg
     
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  2. slimecity

    slimecity Super Member

    Messages:
    2,683
    Location:
    New Zealand
    Very nice finds.

    If it were me - I'd shotgun all those weird little war of the worlds flying saucer ceramic transistors in there. You may be able to fix your problem - and you will definitely improve the sound by doing this too.

    Are there any blown fuses in the unit - that could be an easy fix for a channel down.
     
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  3. Dan887217

    Dan887217 Member

    Messages:
    66
    Haven’t done that yet. Now flying saucer resistors are they the plates vertical. I don’t know I am still green.
     
  4. slimecity

    slimecity Super Member

    Messages:
    2,683
    Location:
    New Zealand
    All the flying saucer small signal trannies look like this:

    tranny.jpg
     
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  5. 911s55

    911s55 AK Subscriber Subscriber

    Messages:
    498
    Location:
    Puget Sound
    Danger!
     
  6. quadmatrix82

    quadmatrix82 Active Member

    Messages:
    273
    Great find!
     
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  7. Dan887217

    Dan887217 Member

    Messages:
    66
    Slimecity these fuses are 2a 250v?
     
  8. Dswankey

    Dswankey Super Member

    Messages:
    3,528
    I like to consider myself a Polk Audio enthusiast, having owned many different pairs and while I'm not 100% sure I'm pretty confident those are not Polk cabinets nor and there is no model called v.2. The tweeter looks like a Peerless but other then that it looks like a Frankenspeaker.

    Congrats! on the Sansui it's a nice little amp
     
  9. Dan887217

    Dan887217 Member

    Messages:
    66
    Thank you. I like the amp it needs work.
    The speakers I have not opened up yet and are heavy little speakers. I agree it is a weird shape. The lay out of the speaker is different than other photos I have seen. Someone on fb mention they could have been used commercially or institutionally.
     
  10. slimecity

    slimecity Super Member

    Messages:
    2,683
    Location:
    New Zealand
  11. Dan887217

    Dan887217 Member

    Messages:
    66
    I have been looking over the one on manuals lib.
     

     

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  12. Dan887217

    Dan887217 Member

    Messages:
    66
    So I tested how long it plays music after being turned off. Is about 13-15 seconds. So this means the capacitors are good still.
    So with reading other threads and reviews people refer to this as audiophile grade device, hi-end, very rare, sought after with recommendations to grab one if seen even if you pay over 500.00 even if it needs work.
    Are all these true?
    Can someone debunk myth or legend?

    I plan on changing fuses in the future and go from there.
    It has one channel working so it set up in my basement with a Yamaha tuner I paid 10.00 for and a infinity Qe single I got for 10.00. I wish I could get a another.

    I enjoy the sound from the Au555a with just a tuner it’s very pleasing like my 881.
     
  13. slimecity

    slimecity Super Member

    Messages:
    2,683
    Location:
    New Zealand
    Like you note - these comments are subjective. I wouldnt call the 555a "very rare" at all - even in NZ they pop up often.

    It sounds better after its reconditioned - at the least with a recap - then the next step is changing out those weird little transistors as to me they only detract from the sound/potential of this great little amp.

    However in terms of "audiophile grade device" - my 2c is that this is meaningless. If you sit a reconditioned 555a next to a 888 or 999 (as I have done), the 999 is streets ahead in terms of resolution and detail however the 555a has tons of character, warmth and bottom end slam.

    Leestereo recently posted a thread of some pretty extensive work he did on a 555a - which shows the potential of how far you can go in modding this amp:

    http://audiokarma.org/forums/index....ade-of-a-sansui-au-555a.816754/#post-11495731
     
  14. Dan887217

    Dan887217 Member

    Messages:
    66
    Wow that’s a nice job he did. A lot of work.
    Makes me wish my chosen profession was different but I love to eat and bake so. Music and food make me happy.
     
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  15. Dan887217

    Dan887217 Member

    Messages:
    66
    I picked up new fuses today as a start to see if it wakes up.

    I have four Sansui stereo receivers / amps.
    I want to keep all if possible.
    What’s to many is my question?

    Listed in order of acquired
    Sansui 881
    Sansui 8080
    Sansui 6600
    Sansui AU-555A

    The other receiver I have is a Pioneer Sx 650.
    I must say in the state the Au555a is in it sounds better than the Pioneer.
     
  16. Dan887217

    Dan887217 Member

    Messages:
    66
    I have great news replaced the fuses have all four channels some fuzz on one channel I believe it’s the not so good quality wire as the speakers I am using have no issues. And wow what a sound out of some bose 201’s.
     

     

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