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Message: <blockquote data-quote="IgnoreMe" data-source="post: 3690441" data-attributes="member: 551352">batteries arent dangerous.current is a dangerous thing, but with the amount of resistance you have in the body, you can touch both the negative and pos. of the battery and hold them and be fine. at 12V with a resistance of 2 million ohms you are looking at .000006 amps.now if you are disconnecting wires here and there, then yes the battery starts to get dangerous, and as helotaxi pointed out, disconnecting the ground will almost guarantee your safety. but the beautiful thing about voltage is, that you hook up in parallel to it, not series, which means you never even have to disconnect anything, just probe.now here's my question, what voltage drop are you trying to read?1) what your voltage is when you are playing bass heavy material?- play a track thats bass heavy that has consistent bass lines, probe the +/- terminals and read your voltage when it holds steady. then compare to what it was reading before anything started playing.2) if you are dropping voltage somewhere on the power line?a) same method, but no music. get a reading from the battery, then get a reading at the amp, and subtract to see your voltage droporb) if you have alligator clips and some speaker wire, one probe on positive teminal on amp, then 1 probe attached to some wire, and then the wire ran to the positive terminal on the battery. the value is your voltage drop.but yes, everything is measured in DC, the only thing thats measured in AC voltage is the outputs on the amplifier (speaker terminals)</blockquote>

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