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4/8 Ohm switch question

Discussion in 'AV Receivers & Amplifiers' started by EN, Nov 15, 2003.

  1. EN

    EN
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    I have SONY STR-DA-50ES av reciever with 4/8 Ohm switch. What is the purpose of it? I read the manual, but I'm wondering what is the switch doing electrically to the amp? Is it just an additional load or something?
    Thanx,
    EN
     
  2. rags

    rags
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    Depends what load is being presented to the amp by your speakers.

    Set the switch to whatever your speakers are rated at - most speakers are either 8 or 4 ohms.
     
  3. EN

    EN
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    Thanx, I know that.
    I read somewhere, that this switch only adds additional load in the 4 Ohm mode,to make easier for ther amp, but this lowers the quality of the sound. So, the amp can handle using it with 4 Ohm speakers in 8 Ohm mode.
    Do I think right?

    Thanx, again
     
  4. bob1

    bob1
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    It cuts down on the power sent to the main amps to prevent over load and over heating of the amps due to the higher load on the amps.Unless you run at high volumes you won't notice any difference (i don't) but the amp will run out of steam quicker on the 4ohm setting.
     
  5. EN

    EN
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    Bob, what does it mean "will run out of steam " ?
     
  6. wookie

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    It means the amp will need frequent watering:D

    Seriously, it means (in a nutshell):-
    It will run out of clean power and clip (distort).

    This will happen sooner on the 8ohms setting. :lesson:
     
  7. wiz

    wiz
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    I thought I was the only one in here with this amp! :clap:
     
  8. EN

    EN
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    Thanx,
    one final thing.
    I use JAMO Concert 11 and pakage speakers for surround sound. Front and centre speakers are 4 Ohm.
    Does the switch work on all of the speakers or only to the front ones?
    How does the normal stereo amp solve same problem without such switch?
     

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