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Limiting output level of a CD Player?

Discussion in 'Digital Sources' started by mattstech, Jul 7, 2017.

  1. mattstech

    mattstech New Member

    Messages:
    15
    Location:
    Calgary, Alberta
    So lately I'm finding that a few of my CD's are recorded so loudly that they cause distortion. I just got a new receiver (Sansui 350) and I find it has trouble with crazy high inputs. The output on my Pioneer PD-T510 is LOUD, much louder in fact than what my cassette deck or computer could output.
    I'll post some pics of the inside later, but is there a potentiometer somewhere inside to adjust the output level?
     
  2. evoroadster

    evoroadster AK Subscriber Subscriber

    Messages:
    232
    Location:
    Honolulu, HI
    A variable or fixed output level is one of the reasons I picked up the Sony XA1ES CD player I have. That plus new replacement laser assemblies were still available for purchase.
     
    tmtomh likes this.
  3. HackWhite

    HackWhite Always on the hunt! Subscriber

    Messages:
    229
    Location:
    Cape Cod, Massachusetts, USA
    Go on hifi engine, or any other source that you can find the schematic for said CD player on, download it, and look it over and see if there is a potentiometer for an output level adjustment... if there isn't, you're SOL :bigok:
     
  4. HackWhite

    HackWhite Always on the hunt! Subscriber

    Messages:
    229
    Location:
    Cape Cod, Massachusetts, USA
  5. Dennis Gardner

    Dennis Gardner Jazz Nut

    Messages:
    1,155
    The best passive controller that I have used is this little Nano Patch from SM Audio. Very well thought out, great construction. I have used their audio products from Australia for over 10 years as they have some of the most unique solutions for odd problems that I run up against in installations or live gigs. This would require a 1/4" to RCA adapter to go between your CD and amp. Nano_Patch+_hires_1.jpg Nano_Patch+_hires_1.jpg Nano_Patch+_hires_2.jpg

    http://www.smproaudio.com/index.php/en/products/monitor-controllers/nano-patch-plus
     
    tmtomh, juno and mattstech like this.
  6. botrytis

    botrytis Trying not to be a Small Speaker Hoarder Subscriber

    Well, your Sansui cannot handle the output from your CD player. Using the variable output of the player will help.
     
  7. ilusndweller

    ilusndweller Super Member

    Messages:
    4,619
    Are you sure the distortion isnt in the cd recording itself? Im guessing you already checked with the volume turned down. It just seems odd as I have never encountered this.
     
  8. mattstech

    mattstech New Member

    Messages:
    15
    Location:
    Calgary, Alberta
    Thanks, something like this would probably work!
     
  9. mattstech

    mattstech New Member

    Messages:
    15
    Location:
    Calgary, Alberta
    I'm sure, this never happened before on my old Yamaha. It's quite a bit newer and IC driven as opposed to the transistor-based Sansui
     
    ilusndweller likes this.
  10. botrytis

    botrytis Trying not to be a Small Speaker Hoarder Subscriber

    Look at the sensitivity, both output of the CD player and input of the receiver. I bet the CD players output max s 2 volt (very common) and the Sansui input is 0.5 - 1 volt. That would cause the issue you are seeing.
     
    mattstech likes this.
  11. Dennis Gardner

    Dennis Gardner Jazz Nut

    Messages:
    1,155
    Sometimes mixing modern gear with vintage gear, it is nice to be able to gain match for smoother source switching and less stress to your gears and ears.
     
    mattstech likes this.
  12. N8Nagel

    N8Nagel AK Subscriber Subscriber

    Messages:
    4,725
    Location:
    Sterling, VA
    The Pioneer that I picked up at a thrift store earlier this week has a built in attenuator that can be controlled by the front panel buttons.

    Unfortunately, it needs a new laser, so that helps you not at all.

    2 volts sounds right for CD player output.

    You could also use an inline attenuator on your patch cord.
     
    mattstech likes this.
  13. mattstech

    mattstech New Member

    Messages:
    15
    Location:
    Calgary, Alberta
    That's probably what's causing it. Would a variable resistor like the ones mentioned above be able to reduce this voltage?
     
  14. jbrainey

    jbrainey Amusing myself to death Subscriber

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    Just to be safe.....you're not using the inputs intended for turntable input(if it is equipped with such) are you?
     
    mattstech likes this.
  15. mattstech

    mattstech New Member

    Messages:
    15
    Location:
    Calgary, Alberta
    Hahaha nope, I remember doing that with a 90s sony hifi system as a kid because that was the only "input" it seemed to have. All of my equipment is connected to the AUX input through a switchbox. Just to make sure I wasn't missing anything, I plugged the CD player straight into AUX, bypassing the switchbox and I still get the same problem :(
     
  16. whoaru99

    whoaru99 Epic Member

    Messages:
    37,671
    Location:
    LoTL
    Input sensitivity is not the maximum permissible, it is the minimum necessary to achieve rated output.
     
  17. whoaru99

    whoaru99 Epic Member

    Messages:
    37,671
    Location:
    LoTL

    Causes distortion, where, as in at what setting of the Sansui volume control?
     
    mattstech likes this.
  18. mattstech

    mattstech New Member

    Messages:
    15
    Location:
    Calgary, Alberta
    Doesn't matter at what volume, the distortion stays the same weather it's louder or quieter
     
  19. sqlsavior

    sqlsavior AK Subscriber Subscriber

    Messages:
    4,119
    Location:
    EspaƱola NM
    Then the distortion is on the CD itself. The modern trend in mastering is to compress and peak-limit (read "clip") the signal so that the average level is louder. Television commercials do the same thing, despite there being a law against it now. Read about the "loudness wars" by googling it. The only solution is to avoid CDs mastered this way. Here is a resource to help you do so:

    http://dr.loudness-war.info

    Green is good, red is bad. You need to use the search feature - there's too much info to just browse.
     
    juno likes this.
  20. juno

    juno Super Member

    Messages:
    1,002
    Location:
    Pembroke Pines, FL
    My wife has several CDs that are completely unlistenable unless it is in the car. One of them is a Madonna disc from a couple of years ago. I had to turn it down so low it wasnt really worth listening to in the house.
     

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