Compression driver protection?

Discussion in 'General Electronics Chat' started by mhtplsh, Mar 30, 2010.

  1. mhtplsh

    Thread Starter Member

    Jul 29, 2007
    27
    0
    Compression driver protection?
    I have seen the circuit attached is used in crossover. It is used for compression driver protection. I like to know does it really work?
     
  2. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    When the voltage of the signal exceeds the value set by the resistors at the bridge rectifier, the triac turns on and reduces the level with the 4 ohm resistors.
    I think the triac will turn on and off and on and off and make a horrible fluttering sound.
     
  3. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    760
    Why would any one use that for god's sake.
    Crossover distortion is bad as it is but this, really stupid.

    There are better ways to get clean sound and better driver protection.
     
  4. Bychon

    Member

    Mar 12, 2010
    469
    41
    There is a path from A2 through the triac gate to ground, so when the voltage at the compression driver exceedes 1.4 volts, the triac will short the signal to ground through a 4 ohm resistor until it changes polarity. What the diodes are doing is a mystery to me. I can't see why they would ever pass current.

    I join the O/P in wondering how this works, as in, why are there 7 parts that don't do anything?
     
  5. mhtplsh

    Thread Starter Member

    Jul 29, 2007
    27
    0
    Sorry!
    I made small mistake in Schematics.
    Here is the modified Schematics.
     
  6. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,754
    760
    Nope. Still the circuit makes no sense.
    The triac is still useless. Most of the time
     
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