Protecting loudspeakers in bridge amplifier

[alex0]

I make one-channel bridge amplifier 2xTDA7293. Protection circuit used relay and standard schema for DC detection. Is it necessary to use 2 DC-sensors (2 resistors with non-equivalent value) for both outputs of amplifier or it’s enough 1 ?

 

[B.VDBOS]

One should work ok

Its only really the AC zero volt reference that’s changed, it should still detect DC