"popping" sound when switched off
Le Mans Master
Joined: Nov 2004
Posts: 8,718
Likes: 20
From: Dyer IN
Cruise-In IX Veteran
Your answer in post #7 was that you weren't familiar with the ground loop isolators and would suggest putting them between the HU and the amp, not exactly a reasuring answer. No one has posted an answer to this yet that I have seen.
Regarding THD it is calculated as 20*log((sqrt(v2^2+v3^2+..vn^2)/v1). Where v1 is the fundamental frequency and v2, v3 etc are the harmonics. It is usually quoted as xx% at a given freqency, not power. I am not an expert either, I was just passing some info on so don't shoot the messenger, if some of it is wrong fine correct it. Peace let's move on.
Regarding THD it is calculated as 20*log((sqrt(v2^2+v3^2+..vn^2)/v1). Where v1 is the fundamental frequency and v2, v3 etc are the harmonics. It is usually quoted as xx% at a given freqency, not power. I am not an expert either, I was just passing some info on so don't shoot the messenger, if some of it is wrong fine correct it. Peace let's move on.
Pro
Joined: May 2007
Posts: 744
Likes: 0
From: WayTooCloseToNY Northeast PA
Penta may be correct that a turn-off delay might turn out to be the answer. The isolator solution is the cheaper and simpler suggestion, and IMO should be tried first. The reason is because Hawk07 was concerned with the pop when switching sources as well as when turning off. If it doesn't do the job, move on to to try something else. Since no one here knows exactly why your problem exists, trial and error becomes necessary.
It's becoming increasingly apparent that there's a lot about this stuff you don't understand, and it makes me wonder if pulling your dash apart isn't something that's over your head, and therefore ill-advised. Your attempt at explaining THD make this all the more likely.
I'm out.
Last edited by Spkrboy; Nov 4, 2007 at 08:05 AM.
