Subwoofer Causing Amp to Stay On

Cheater plug still leaves neutral- has to, or no power - and that is where the voltage differential is coming from. 

I was going to say try a Line Out Converter. https://www.epanorama.net/circuits/speaker_to_line.html But I'm not sure even that would work. Because the LOC circuit (two resistors) is already there. All these plate amp subs that are designed to work with speaker level inputs, the first thing inside them is the same LOC. Has to be. Something has to drop speaker level down to line level, that something is a resistor, ie LOC. 

But I'm no amp designer, just a guy with a pretty good layman's understanding. It may be that using a LOC at the Audio Note puts the resistor in path of the speaker in a way that lowers the voltage the speaker sees way down below audibility. Can't really see how that would be, just a guess, which is why I didn't mention it earlier. 

If you want to try that method akwilson501 its really simple and needs only about $2 worth of resistors. A picture of the ePanorama mod in my amp is on my system page. https://systems.audiogon.com/systems/8367

Before the subs, Audio Note Amp could be on or off and it was dead silence. Now its slight static either on or off.

Right. Because before the subs the speakers were connected to and driven by the Audio Note only. But then you connected the speakers to the subs. 

Pretty sure I got it, the problem is how to explain what I think is going on. It will probably help to try and visualize the speaker/amp/sub as one circuit. From the sub to the speaker to common is one continuous circuit. The problem is this circuit has two different paths to neutral even when the power is turned off. This creates a voltage differential on the circuit. This voltage differential is what you are hearing coming out of the speakers. 

The power switch does not completely disconnect the component. It only disconnects the hot power coming in. Neutral and/or ground are not broken. So what you have in effect is a ground loop. Only its not an earth ground loop but a neutral ground loop. Don't know if there is a technical term for it but what you are hearing is the extremely small voltage differential between the two different paths to neutral, or utility ground. Whatever you want to call it.  

Ordinarily no one would ever notice. We are probably talking millivolts, if that.  But you have really efficient speakers. Even so I bet you can barely hear it. 

I think I know what’s going on but you have to clear a few things up. One you keep saying "speakers turn completely off." Speakers are never on or off, unless they are powered. So either you have amps in your speakers or you’re saying "completely off" when what you mean is "dead silent." 

Also what exactly is the character of this noise you’re hearing? White noise like hiss? Pink noise like shuhhh? Hum? Or static?

Also when you say floating ground, all these outlets you’re talking about, the third ground wire is not connected to anything, right?
And this noise, its only there when everything is plugged in. Unplug either one, and the noise stops. Is that right?

Pretty sure I know what is going on but its gonna trigger some big time and no point doing than unnecessarily.

Are these the kind of subs that turn on automatically when they detect a signal? Or do you have to turn them on and off manually every time?