What exactly happens when you throw the "less than 8 ohm" switch on the reciever?

Discussion in 'Speakers' started by Dean Arizona, Nov 15, 2004.

  1. Dean Arizona

    Dean Arizona Agent

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    Many of us have receivers that have a switch on the back that we are instructed to throw if we need to drive speakers that have impedance of less than 8 ohms . After a search of the forum, I can't locate an explanation that describes what exactly happens inside the receiver. Is this function some sort of current protect mode for the amp or does it actually increase the current available to the affected channels? Just curious if this mode has any meaningful value - generally an amp designed to drive 8 ohm speakers does poorly when asked to drive more demanding speakers.[​IMG]
     
  2. Thomas Willard

    Thomas Willard Stunt Coordinator

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    Essentially this switch merely prevents the use of another set of speakers (B) at the same time you have the A speakers in use. Two sets of 4 ohm speakers or even one set of 8 ohm and one set of 4 ohm would present too low an impedence to the receiver.
     

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