Powered speakers show audiophiles are confused

@donavabdear , if it is both subs I doubt they are both defective. Here is a trouble shooting sequence that might help:

1) Take one sub to a different room, on a different breaker. Turn the volume down to 0, then plug it in WITHOUT any interconnects plugged in. Turn it up from 0 to max and notice if hum engages. If it does then do same with other sub. If they both hum without any components plugged in it might be an issue on the powerline and I would try the DC Blocker from Audiolab. Amazon has a 30 day return.

2) If you don’t get a hum take it back to your room and try a different cable (XLR/RCA). Repeat as before and if it hums switch cables. If it still hums it might be the connection with your preamp. Try different ports, look at your settings. It might be the sub gain is set too high in your preamp.

3) If all of that fails to find the issue call JL Audio Tech support or maybe another member has some other suggestions.

@donavabdear

Quick Google JL Audio Fathom f113v2 and hum. Common problem. Nothing to do but get them serviced.

@thespeakerdude , No it is not speakerdude. I measure everything I do and since when are line array characteristics just theory?  They are very easily demonstrated. There are very few hard boundaries is acoustics, everything has a slope. For all intents and purposes line arrays beam severely in what is usually the vertical axis which is why you see them curved at stadium concerts. What is most important to me is that the subwoofers match the main speaker's line array attenuation characteristics as related to distance. 

My audio room was also purposely designed for audio. There is not specific back wall. The room is open to the rest of the house eliminating to most significant reflection. The deviations that remain at the listening positions are easily managed by room control. Right at this moment I have three. You can have a listening position wherever you plant the measurement microphone. 

@juanmanuelfangioii , Not at all. I REALLY think your moniker is in bad taste.

@mijostyn Happy Christmas.

Oh and I really do not care about your opinion. Do you feel better though? 

Have a wonderful Holiday and I hope you find inner peace.