Jimi77 5,000+ posts
CarAudio.com VIP
The rca is suppose to have ~2 vac before clipping but my HU is only producing 0.2 vac clean before clipping.
Edit: there is coming sound out of the sub and speakers I just want to know how much I can tune it before it's clipping
You can also do the same test with a 0db sine wave, say 1khz or 2.5khz sine wave. Turn up the gain or volume, you'll hear the pitch of the sine wave change and that's clipping. When you hear the clipping, turn the gain down 2-3 db. If you have really good ears, you can turn it down just 1db.