I did try to search.

So I read the Flash does 2 different things, one thing it does is enable the rear speakers on a special. The other thing it does is remove the EQ curve. What happens if you have the EQ curve removed but do not add amps and just run factory speakers? Thx

 

If you are referring to the Ultra 4speaker/0amp flash, it enables rear channels and front to rear fade control. It does not flatten the eq curve though.