my amplifier sound kit is not working yet ic4558 is not proper work it is dual supply kit 4558ic oin no4 n 8 showing11volt but others pin not showing vltage please guide and help full reply thanks
If it is dual supply then pin 8 should be PLUS 11 volts (or whatever the supply is) and pin 4 should be MINUS 11 volts. If those are correct then it would be normal for all other pins to be close to zero volts DC.