hi..

bought a pair of 4 ohm speakers froma garage sale, never used. got them in they work fine, one made a real rumbly noise then unsoldered a wire that goes to the cone (the end that goes to the terminals and resoldered it and it has made it better but is still there but no near where as bad. its only with one of them which is the left one.

touch the wires with your fingers that goes to the cone(cone end) and the rumble goes away totally