Question about Kenwood KAC-9152D Car Audio Amplifier
Ohms does not make a difference for the rca cables, and the volts at the stereos max power will be whatever that brand and model is rated for the output cables, usually 2.5, 5, 7.5, or 9. your average output is for 2.5 volts on an affordable aftermarket radio
Posted on Jan 08, 2009
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It's likely that the amp is defective but you should check the shield ground of the RCA signal cables before sending the amp off for repair.
Disconnect the RCA cables from the amp.
With your multimeter set to ohms, measure the resistance from the outer shield of the RCA cable to chassis ground. If it's more than a few ohms, that could be causing your problem.
If this is higher than a few ohms, short the meter's leads together to make sure the meter will go down to 0 ohms.
To check the shield ground of the head unit (assuming that the head unit is driving the amp directly), disconnect the RCA cables from the head unit and measure the resistance from the RCA output shield to the case of the head unit. It should essentially read 0 ohms.
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