Low frequencies are too high

BarbaMento

Commendable
Dec 23, 2016
3
0
1,510
Hi everyone.
I have an Aiwa 8300 amplyfier, and 2 jensen speacker (i don't know their name because i inherited them from my father, but they are almost 20 years old).
I have been using them for almost 3 years and i've never had any problem untill yesterday.
i decided to clean all my gaming position, so i unplugged everything, and plugged it back.
But that's when the problems begin because now the sounds has low frequencies way too high even if the control knob is set on 0.
What could that be?how could i fix it, or how should i call to fix it?
just to be clear I took away the dust using just a rag.
 

BarbaMento

Commendable
Dec 23, 2016
3
0
1,510


how much do you think it will take?