Compression driver protection?

Thread Starter

mhtplsh

Joined Jul 29, 2007
27
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?
 

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Audioguru

Joined Dec 20, 2007
11,248
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.
 

R!f@@

Joined Apr 2, 2009
9,918
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.
 

Bychon

Joined Mar 12, 2010
469
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?
 
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