- Take a multimeter placed on the setting for the insulation and continuity tests then press “select” to set it in Ohm meter.
- The black banana-type cable and plugged it into the COM port.
- the red banana cable will be placed on the resistance measurement port as in photo number 1.
What should my RCA voltage be?
A good quality RCA audio source should have a voltage rating around 1-2 Volts and a low impedance. The voltage is the “strength” of the signal and the “impedance” relates to signal integrity once the RCA is plugged into the amplifier.
How do you test RCA output on a head unit?
How do you check preamp voltage?
You can use one of the online sine wave generators or an mp3 sine wave sample of 400Hz. Just play it through your pre-amp and measure the output level with the multimeter set to measure AC voltage. This should give you an accurate measure of the output levels of both channels.