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Finally got the last receiver I'll ever need

Discussion in 'Exclusively Sansui' started by mattsd, Aug 2, 2018.

  1. tater415

    tater415 AK Subscriber Subscriber

    Messages:
    263
    Location:
    alta loma ca
    When I purchased my G 33000 a couple of months back It came with the cord connector cut off so I had my tech installed a new male and female cord connector. It's not OEM but it works good and and it looks Factory. I can take pictures and find part numbers if you would like to see my cord connectors
     
    Last edited: Oct 4, 2018

     

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  2. tater415

    tater415 AK Subscriber Subscriber

    Messages:
    263
    Location:
    alta loma ca
    My G 33000 does the same thing . It shuts down the amp way too soon. My g-9000 also shuts down way too soon. My tech said he could bypass the protection circuit. But for now I decided to leave it alone.
     
  3. kevzep

    kevzep Its all about the Music

    Do it, as long as you are sensible with it, you won't have any issues at all. I think its essential if you are running lower impedance speakers like I am, I have the JBL L7's and they are a 6Ω nominal load, but I think they dip a lot lower at certain frequencies...
    On you G33000, on the F2902 and the F2903 boards, you would remove D11, this is the diode which triggers the over-current protection.
    On the G9000 you would remove D15/16 on the F2809 board.
     
    Hipocrates likes this.
  4. cb5300

    cb5300 Active Member

    Messages:
    104
    Location:
    Virginia
    Can anybody enlighten me if the G22K and G33K will handle a 4 ohm load? I currently have a Pioneer SX-1980, Marantz 2500, and a Sansui G-9000DB. All drive my Legacy Audio speakers with no problems. I have been dreaming about the big G22K/33K for some time now, but read that the speaker load for the G33K was 8 Ohm minimum....Anybody able to enlighten an old man...
     
  5. cb5300

    cb5300 Active Member

    Messages:
    104
    Location:
    Virginia

    I have a G-9000DB and it drives my Legacy Audio Studio HDs (4 Ohm) just fine.....
     
  6. kevzep

    kevzep Its all about the Music

    Nonsense, the G9000/22000/33000 are all very capable of driving 4Ω nominal load. The problem arises when certain makes of speakers have different or difficult impedance curves.
    The problem is the static nature of the design of the over-current protection, its set for a very tight trigger at exactly 220 watts at 8Ω (G22000). BUT, this is a ridiculous way of doing it, because depending on the variance in impedance, sometimes the protection can kick in as early as 50watts rms, using V=IR you can see why this happens.
    The output devices are capable of a lot more than the protection allows them to do. Most professional amplifiers have some kind of dynamic current limiting with overshoot. Small microsecond peaks are not going to blow up your output devices, and this is where Sansui didn't have a plan for how to manage this.
    The 4Ω speakers you are using on the G9000 may have a nice easy impedance curve, and if you never really turn it up past about 30watts on the output meters then you are in the safe zone.
     

     

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  7. mattsd

    mattsd AK Subscriber Subscriber

    Messages:
    1,615
    Location:
    Cincinnati, Ohio
    ^What he said. And on a different note, my G-22000 parts are coming! I will be starting a thread on the restoration soon.
     
    Hipocrates likes this.
  8. kevzep

    kevzep Its all about the Music

    Nice one Matt I'll be looking forward to seeing how you go with you one, mine is coming on the bench soon for new speaker terminals, dismantling and deep cleaning of all the lever switches in the pre-amp....Always something to do on these babies..
     
  9. ManyMoonsAudio

    ManyMoonsAudio AKA paul79 Sponsor Subscriber

    Messages:
    3,055
    Location:
    Tulsa Ok (C-Ville)
    That is the same set that is used on my Totaldac to connect supply to DAC. Very excellent connectors.
     
  10. LBPete

    LBPete Rolling Along Subscriber

    Messages:
    11,483
    Location:
    Long Beach, CA
    Just a reminder to everyone in this discussion. If you haven't posted your serial numbers please do. The more serial numbers we collect, the more accurately we can estimate production numbers.

    - Pete
     
  11. tater415

    tater415 AK Subscriber Subscriber

    Messages:
    263
    Location:
    alta loma ca
    My G 33000 is going back in the shop to have the protection circuit bypassed, my G 33000 will even trip the circuit on a 8 ohm load it's really annoying.
     

     

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  12. kevzep

    kevzep Its all about the Music

    Its a disconnect, not really a bypass.

    Remove D11 on both the F2902 and F2903 boards, which are in the bottom of the power amp. They are the ones that have the protection circuit, regulated supplies and speaker relays on them.
    Easiest way would be to just clip one of the legs on the diode and bend it out of the way.

    You could do it yourself, it would take about 15mins from beginning to end including removing the bottom of the power-amp.

    And, yeah it will do it on 8Ω speakers as well, that circuit is not very well set up.
     
  13. cb5300

    cb5300 Active Member

    Messages:
    104
    Location:
    Virginia
    Thanks for the reply, I don't know why, but I really want to pick up a G-33K to add to my collection. I already have a Marantz 2500 hooked up to a set of Legacy Audio Focus SE's, a Pioneer SX-1980 mated up to a set of Cerwin Vega 316R's, and of course the Sansui G-9000DB hooked up to my Legacy Studio HD's. Running out of places to set up stereo systems...:confused:
     
  14. kevzep

    kevzep Its all about the Music

    Hahaha...I know why!! Because they are so freak'n awesome!! Seriously I enjoy the sound of my G22000 more than the McIntosh C33/MC2205 I used to use in my music room....
    They really are next level, if you like your G9000, then you'll fall in love with a G22/33000....
     
    Ronald.C likes this.
  15. tater415

    tater415 AK Subscriber Subscriber

    Messages:
    263
    Location:
    alta loma ca
    haha this is exactly what happened to me I got the Pioneer SX 1980 and then for some crazy reason I thought I needed the G 33000 and the 2600 plus the Technics sa-1000
     
  16. centsless

    centsless Super Member

    Messages:
    1,078
    Location:
    ohio
    Awesome...:)... But...what I discovered is when playing bass heavy music at higher wattage, is when the shutdowns occurred.

    Try your receiver at around eighty watts on these songs... Peter Gabriel- Growing Up...then Love Town....followed by Ian Dury- Hit Me With Your Rhythm Stick. If it passes that....you got a winner...winner chicken dinner! Not of mine did except the 2205 of course...and won't try the 1980!..lol.
     

     

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