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au-555a

  1. T

    Sansui AU-555a vs AU-888

    Hey AK Been looking into upgrading the power of my system. Currently running The AU-555a, and got myself some less efficient speakers, and thinking of upgrading to an AU-888. Guessing it won't be as direct as "same sound, more power" type of transition, how does the 555a compare to the 888...
  2. B

    AU-555A adjustment

    Hello, In 2013 I bought a Sansui AU-555A. Since then it had been working fine, at least for my expectations, except for the phono but I did not use it. A few months ago, after reading, I don't remember where, that after 50 years an amplifier with original electrolytic capacitors (EC) should be...
  3. Assil

    Sansui AU-555A Post Restoration bias problem

    Hello everyone I am currently restoring an AU-555A and facing an issue with the left channel of F1266 power board. In brief I have replaced all electrolytic caps, all transistors except the C1030, still good. I have individually checked all resistors, pots and conductivity of all copper traces...
  4. I

    AU555A vs AU-4900 vs AU-5900: which would you choose?

    Happy New Year folks. I am seeking advice from members who have owned / are familiar with the AU-555A, AU-4900 and AU-5900. I have (and like) a clean unrestored AU-4900, which has been my introduction to the wonderful world of Sansui. I took some advice last year and bought a clean but...
  5. David Weaver

    AU-555a Revived...Leestereo Style!

    I thought I would share my experience of my first Sansui AU-555a rebuild inspired by Leestereo's original post. It all started when I bought my first 555 from a coworker. It was in our pressroom gathering dust and otherwise pretty much in need of some TLC. I cleaned it up, fixed the case and...
  6. JBEHBA

    Sansui AU-555a Versions?

    Is anyone familiar with there being multiple versions of the AU-555A with differently colored/finished faceplates? Did the international and NA versions have different faceplates? I recently acquired a second amp and noticed a few differences between them as I was cleaning this one up. Below...
  7. Leestereo

    Repair and Upgrade of a Previously Recapped Sansui AU-555A

    On the bench is a Sanusi AU-555A that was sent in by an AK member for repair and upgrade. The background on this unit: the owner had this unit recapped (approximately a year ago by a tech local to him), but was less than satisfied with the results. Aside from the lackluster sound following the...
  8. Leestereo

    Leestereo's Restoration/Upgrade of a Sansui AU-555A

    A very nice Sansui AU-555A was on the workbench for a complete restoration and upgrade. Part 1: Power Supply The stock C001 capacitor (2200µF/63V) was replaced with a 6800µF/80V low ESR type; note that the voltage rating of the replacement was increased to 80V since this capacitor is...
  9. dbrown

    Best Speakers for Sansui AU 555a and 7070

    Hello all, I currently own a Sansui 7070 and plan on getting a rebuilt 555a this week (very excited!!). As for speakers, I have little Celestion Dittons (that I love and used to have paired with my now gone 771) that I plan to pair with the 555a in my small bedroom and some Infinity Qe speakers...
  10. HenkBok

    Just got a Sansui AU-555a, what should i do first, and is it suitable for headphones?

    Hi guys, I was just gifted a Sansui AU-555a (and some other audio equipment) by my father, who inherited it from my grandpa some time ago. It's in awesome condition without any scratches or broken buttons, and after fiddling around with it a bit, i got it set up and working pretty well. I...
  11. C

    Dad's old AU-555a

    Hey guys, Inherited my Dads old AU-555a it has recently lost sound on the right channel - i can still hear VERY feint amounts of sound and a bit of static, it dropped in and out before failing completely, and ideas where i should start? was thinking about giving it a refresh while i have it open...
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