clamp it, and tap an oscilloscope to the rca signal.... se what it's really doing
this
you will kick and scream //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif
and, yes, if you set it to,say, 35v, and then put a load on it, there will be rail sag, putting it under 30v. when you try to compensate, you can feed it a clipped signal, though the amp is not clipping. same can be said for "giving head room", but that's beside the point. what wwas said //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif was not to adjust it below that point on the tone, because the settings are turned down (sub/bass) and, if you think there is no clipping playing the same high output with the car off, if it is set to the car on, then either you have it turned below what you could be getting, or you are mistaken. there is a big difference in rail voltage for every volt maintained in the supply. clipping, is quite simply, the fact that there is no more voltage to give to complete the wave.
about the hz, again, voltage output at lower tones is lower because of rail sag, not just because it's tuned down. i have physically measured the different points on the rails and seen this. a few times this week, actually. also, i don't know what station you listen too, but there is more music that i've heard 50-100hz, then below...... under 50hz songs is something you have to specifically look for, imho. and, yes, i listen to everything..... everything.
take a look at how compliance ratings (birthsheet specs) are measured. it is a rating of the point where clipping occurs, which is different at different voltages.
