Audio Systems: Mark Levinson speakers cutting in and out, mark levinson speakers, amplifier

Question
We have a 2004 ES 330 Mark Levinson system in our Lexus. We had a problem originally the speaker in front left side (drivers) did not work. To remedy that problem a mechanic jumped the back drivers side speaker to front speaker. Now as we are driving all the speakers cut in and out intermittently, however when it is parked the speakers work until you turn volume up quickly then they cut in and out again

Answer
TURN OFF HE RADIO !!!

that was a very bad idea, you have a bad channel on the amplifier, that can be repair,
but if you wire 2 speaker on 1 channel of the amplifier, you are going to damage it a lot more,
the amplifier needs to be repair

the amplifier is cutting off because of the 2 speaker on the same channel