Ok...I know how to try and set your gains with a multi-meter but I was wondering if there is a way to use it to find out what voltage your RCA's/preamps are putting out? I know I had a discussion a while back about my headunit voltage and how you wouldn't really see 5v unless you had it maxed out in volume. So, I might be looking at another amp and don't want to get into a situation with it if it says 4V max input sens and my HU has 5V. Although I had this setup with a Alpine amp before and had no issues. Just wondering though so I can test and make sure....