9090db Loudness and 300hz bass settings

Discussion in 'Exclusively Sansui' started by Steveomatic, Aug 3, 2017.

  1. onwardjames

    onwardjames Hoardimus Maximus Subscriber

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    14,875
    Location:
    Kentucky
    Ahem.....gents....to get back to the main subject matter, YES be careful employing both loudness and bass boost.

    My 9090db I just recently parted with would part your hair at 9 o'clock. Never went past 10 oclock, as it just hurt. I used loudness, but no other boost.

    And yes, submit the s/n if possible, and have that thing benched and checked.

    Good luck.

    Some of the behavior here is embarrassing to both Americans AND AK'ers. Let's all chill out.
     
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  2. tnsilver

    tnsilver Super Member

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    2,326
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    Boston
    Yep. I noticed that too. :smoke:
    It's a power house. The real deal.
    Chances are you'd go deaf before you'd detect any clipping.
     
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  3. moefuzz

    moefuzz Active Member

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    Location:
    Peeyong Bangyou
    Foreign languages and people outside American
    dont fit in here?


    Or is it foreign concept are not known outside of other countries?

    not my choice
    but others yes.


    ?
    you go girl
    .
     
    Last edited: Aug 12, 2017 at 6:55 PM
  4. moefuzz

    moefuzz Active Member

    Messages:
    331
    Location:
    Peeyong Bangyou
    .



    Yes, thank you for to point this out.


    Also,
    How very interesting how Sansui design things over time,

    As you point out, 9090 powers up at 9 and 10 oclock is earth shakes.

    And then later,
    Things like G9700
    make earths quake at 5
    when six rocks the moon.

    Get Back On Subject.

    moe


    .
    .
     
    Last edited: Aug 15, 2017 at 4:38 AM
  5. tnsilver

    tnsilver Super Member

    Messages:
    2,326
    Location:
    Boston
    Moe? I read your post about the Sanken counterfeits and it was A+ stuff.
    Please don't ruin your good record. We don't do that stuff here. Keep it friendly please.
    Do you have a 9090DB? You must admit it can get pretty loud, with the volume knob
    between 9 and 10 - right? How much further you can crank it before it gets real uncomfortable?
    How much till it hurts? I bet not much. Can you really hear it clip? Good for you in that case.
    Us elderly, don't typically have that kind of hearing any more.
     
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  6. moefuzz

    moefuzz Active Member

    Messages:
    331
    Location:
    Peeyong Bangyou
    I'm elderly too and have lost the hearing I had.
    But yes, In the 80's
    I worked in on e of the most high tech (top 10)
    recording studios in the world.
    In 1986, we start the process of upgrade
    studio B to Another Neve Console
    which was purchased from "The Cap't and Toenel" Studio.

    This Neve mixing console was about an 1967 48 track Neve
    that had done work in Big studios in Europe (Including voicing John Lennon)
    and then be sold to Cap't etc.

    Neve consoles were the Sansui of their field. Just beautiful clean from fronts to back.

    ---In 1987 the studio upgraded to 2 - 48 track Neve consoles
    run into the all new (in this day) Sony 3348 1/2 inches digital tape machines
    (2) each setting 48 tracks to 1/2" reels. For a total 96 Tracks direct to CD/Digital.
    At this Time I must learn to hear the "new" fangel distortion of the new Digital years,
    -Aliasing was the new distortion, and aliasing was based on ~48~ khz carrier signal of Sony
    48 track Didgital tape machines to make DDD direct to disk for artists with holes in there pockets.

    Still, noise is noise, fuzz is fuzz and distortion was the enemy
    even when recording in that high tech day.

    =================================================


    One thing to remember is that when amps are pushed into clipping,
    They become unstable, And the first thing in lines is high frequencies (tweeters)
    complain in harshness before the total bandwith turn to muddy.
    -You can see dirt on a high freq song/tone fester when the amp approaches clipping.
    -Approaches clipping.
    Osciliscopes are handy to watch a high frequency tone suffer the
    brute of bass causing -> the onset of<- clipping. The entire signal becomes unstable
    (The transistors pushed beyond limits and not enough amps to keep up)
    (...and of course create the fast heat)

    either you can turn it down, maybe just to let the amp recover?
    or let the smokes out.
    ?


    But not everyone has grown up in a field that
    has been in a studio, big or small.
    And of those many are there for "fame"
    But some have good ears.
    I'm not the only one that can notice when a amp
    becomes unstable, there are 8 billion people here.



    "just sayin"





    cordialement,

    moe

    .
     
    Last edited: Aug 13, 2017 at 12:44 AM
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  7. moefuzz

    moefuzz Active Member

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    331
    Location:
    Peeyong Bangyou
    Jmho,
    Sansui's are so clean even when pushed.
    Yes, the context of making her perform
    and then showing of to friends is familer.

    But Sansui to this day is still so good
    at making her perform
    and Still showing off to friends?

    ?At least I always though so
    moe




    .
     
    Last edited: Aug 12, 2017 at 9:35 PM
  8. tnsilver

    tnsilver Super Member

    Messages:
    2,326
    Location:
    Boston
    Cool career! Thanks. Not showing off but a real story:
    My friend Toli, an EE who redesigned the F2624 driver amp for the 9090DB was auditioning the unit in his living room with another friend for the first time.
    He told me (I'm paraphrasing here since I don't remember it word for word):
    "We rocked the living room for as loud as we could go and we were still using up about 15 watts"
    Then he said: "It was nice to know we had 110 watts more in reserve".
     
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  9. Pauln

    Pauln Active Member

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    481
    Location:
    Houston
    If you have the Heresy "I" (which weren't called that until the IIs appeared), the lowest impedance is 10.2 ohms happening at about 140Hz.

    HeresyImpedance.jpg
     
  10. onwardjames

    onwardjames Hoardimus Maximus Subscriber

    Messages:
    14,875
    Location:
    Kentucky
    Just for the sake of bragging, and yes, I'm bragging on one of our techs here, my Sansui 9090db was restored by Glenn (Echowars as he's known here) and measuring at clipping, it was doing 161 wpc.

    That thing was scary. Had it on some JBL L100T's, and it was really controlling that splendid woofer that those late era JBL's are known for. I couldn't take more than 25 watts or so.
     
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  11. BushmasterM4

    BushmasterM4 Active Member

    Messages:
    195
    About ready to take my 9090db in for a going over. Had it repaired a year or so ago (loud pop followed by protection mode). The repair shop had the damn thing for about 5 months. Got it back and while it fires up, one tape out and another tape in don't work, both tape monitors don't work, and its lacking the balls it use to have. Sounds great, but have to crank the volume up more than before to get the same db level. Now to decide where to take it. Not going to the guy who had it before !!! But on the subject of hearing or knowing when an amp is about to clip and distort. I can hear it. But I have been a musician/studio owner for eons and I push preamps/amps all the time.
     
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