HELP I think I have an electrical issue??

Except for I used Analysis Plus balanced interconnects before. Now that I am using the Genesis m60s which are unbalanced I am using a cheap pair NXG rca cables.

Are the NXG rca cables shielded? Try another pair of ics that are shielded.

Like I said before all has been fine with my previous amps since I installed the 2 dedicated lines 4-5 months ago, and this just started yesterday when I hooked up these amps.

Could be these amps are more sensitive to RF interference than the other amps.

The ignition spark on the furnace is high voltage and generates airborne RFI. It is also possible the HV spark ignitor is sending RFI back through the equipment grounding conductor of the branch circuit that feeds the furnace. When was the last time you had your furnace checked out? You might call someone out and have it serviced and have them check the ignition controller and the ignitor for a possible loose or corroded ground connection.

Jea48,

Well I have no idea about my particular nxg cables, I cant find any info about these exact ones and they are prob about 5-6 years old so no telling. I see there are some new ones that are shielded that are prob the newer models of the ones I am using.
As far as the furnace goes, it is 5-6 months old, I just had it put it.

I also tried to lift the ground on both of the amps, this did not work either. I guess the thing I will do next is just wait for my new interconnects which will be here soon and I will see if that fixes the problem, (hopefully soon).

Cables are not going to fix this issue, picking up RFI from the furnace is the longest of long shots, and they didn't do it with the other amp, should tell you something. Ground potential is somehow different with new amps, I don't know why.

I can just about guarantee you, lift the ground on dedicated circuits at AC receptacle, noise will stop and your system will take a nice leap forward. Also be aware this is dangerous, only a temporary means to determine the ground is indeed the problem.

Hospital outlets have an isolated ground. The wire going to it should be 3 conductor plus ground. Black is hot, White is common, Red with green tape added is ground to the outlet and the copper wire is for bonding to the metal outlet box. If you used 2 conductor with ground and did not use a metal box then you may not be grounded correctly.
Remove the outlets and put a regular outlet in. This may help. It is a waste if you use isolated grounded outlet and do not use the correct wire. Tube amps will have issues with bad grounds more than solid state. You could also try cheater plugs and see if the solves your issue.

Also on your breaker box, as you count down on the each side of the breaker box every other breaker is the opposite side of power. Breakers on the left side, 1 is 1 side of 208 and breaker 3 is the other side and the same for the right side 2 is one side and 4 is the other this is so if you put in a 2 pole breaker you get 208. Your breakers for your amps should be on the oposite line from your furnace. There is a thread in Tech that shows the inside of a breaker box and how it is wired for power to be on the same side.