Quote Originally Posted by Tony_Montana
Ok John, I will bite. What causes the pop, and what is the cure?

I always get this nasty pop sound from subwoofer when I turn off my flourescent light
Ummm, Tony...

I already posted a pic, with the relations...here..

And, in return, you mashed me about the quality of my drawings, and my handwriting..

So, poo poo to you..you naysayer..

He he..

HI Tony...hey, notice the deletions over there in the Heaviside discussion...took what, less than 12 hours? I'm so bad, pointing out poor behaviour..got another nastygram too...man, I'm just thiiiiiis close to "history".

I am really getting tired of all this "miles and miles of wires" stuff..

Yes, there are miles of wires...

Yes, the electrons are slow...

But, no...audio equipment does not refer it's input to a ground located at the power generator...in fact, most refer their inputs to the ground of the ac outlet, in one way or another.

External entities, like lights, motors, all bounce the ground reference, or by loop pickup, cause ground currents..here, since the ground currents can be large, in the tens of amps, and fast (12 phase scr based power supplies).

Re:your sub...how is it connected to the power?...How is the input cable routed?

BEFORE DOING THE NEXT: Make absolutely sure all your outlets are wired correctly!!! no neutral/hot reversal...

Take a DVM, and measure the ground to ground voltage (NOT THE NEUTRALS) between the sub and your source (receiver) with the signal cable not connected. Then, measure the AC amps between the grounds..then, at each outlet, measure the neutral to ground voltage. (In my office, the outlets have between 1/4 volt and 1.5 volts between grounds with no office load..)

Then, repeat each while turning the light on and off..

Answer with a nice description of your setup (perhaps a crude drawing???):-), and then we can troubleshoot more.

Note: a cable hookup can also give problems...Since it is physically separated from the ac house feed, it forms a really big loop. Any unbalanced ac draw can broadcast to the cable...unbalanced being currents that go from your neutral/ground at the panel, through the ground wire into the house water main feed in. This current does not neutralize at the house mains input, wreaking havoc..

Cheers, John

PS..a pic woulda been better, Tony...maybe my 9 year old can draw one you'd consider quality...as mine just don't meet your standards...:-)