speakers had a voltage pulse- performance loss?

hi, i'm sorry if this is a replicate thread of a sort but the question im about to ask relates to my other thread here. cheap chinese preamp sent a nasty voltage pulse downstream that startled me and my whole family. the next day i notice that some fidelity has been lost in the amp. (white noise when it didn't before). i have no other amp to swap to see if my speakers are also affected in some way so i turn to you gents expertise. could the voltage pulse have degraded my speaker components also? changed the value of the caps, worn out the drivers, ect. :confused:
Last edited: