synergistic research orange blue fuse direction.

Again I state that arguing from the standpoint of common sense or sound engineering is pointless here.  These people hear significant changes when a fuse is reversed.  This in itself is remarkable just because a long period of time has elapsed in the reversal process - unless the device's cover is left off and the innards exposed, which is probably more damaging to the sound that the effects of the fuse.

Of course their aluminum foil hats also affect the sound.  

jnorris2005
Again I state that arguing from the standpoint of common sense or sound engineering is pointless here.

>>>>The reason it’s called common sense is because it’s so common. Thanks for playing anyway.

Can someone please tell me how CdS cells work and whether they are passive or active devices?

audiozenology "Can someone please tell me how CdS cells work and whether they are passive or active devices?"

I really do encourage you to acquire through purchase or your local library an introductory text on electronics so that you can "connect the dots" as Americans would say regarding you're incomplete knowledge base also "Google is you're friend" is a very popular expression for a very valid, sound, understandable reason.

"....if it’s an AC signal, why does the directionality matter?"

It doesn't.