Dynamic Headroom

Correct me if I'm wrong. In my case dynamic / headroom and such doesn't matter.
If I use 30x2RMS, my ICE are 500x2@4, why would I care if they had 3db or 0.1db headroom? 30x2 is pretty loud.

Magfan -- No correction needed. You don't need any dynamic headroom provided that brief musical peaks do not approach the 500 watts. Keep in mind, though, that 500 watts is only about 12db louder than 30 watts.

Best regards,
-- Al

Al - I like percents or ratios instead of dB. In case of 500W vs. 30W ratio of perceived loudness is:

R = (500/30)^(1/3.5)= 2.23 where "^" means "to power"

Grimace,

Before the post turned into a congressional assembly, I think Al's initial post is a legitimate answer.

Cyclonicman - Thank you for you valuable summary.