Excessive high tone pitch

[MarcelvdG]

As far as the hookups, I have heights connected to the receivers. The heights are connected via banana plugs and 16 gauge wire. I have all the other speakers connected to the amps, the fronts, center, the sides and the rears. They go RCA pre-outs from receiver to the 1/4 connector. I ran it like that to keep the heat down from the receivers. Somebody recommended it.

What kind of equipment is driving what inputs of the Marantz receivers?

 

[mattstat]

would that drop it back to the marantz receivers

Not necessarily. Anything upstream that feeds to all speakers could be the issue. It's unlikely that both Marantz pieces would fail in the same way at the same time, so if the tone is coming from all speakers, Marantz seems an unlikely suspect (though unlikely doesn't mean impossible).

The main thing the app (or any reasonably quantifiable measurement method) should get you is the ability to test/unplug/swap different things and actually determine the result.

Also, an app that displays the spectrum like this is probably going to make things most obvious (this was just a random grab from google, there are many of them available).

 

[Pendragonf]

All the fronts, center, and surrounds are off the pre outs to the amps. The main speakers are rca to 1/4 input to the amps. The main speakers are banana plug from the amp to the speakers. When I mean main speakers I mean fronts, center and surrounds. The heights are the only speakers plugged into the marantz reciever on the speaker jacks. And of coarse the sub are powered rca from pre out to rca on sub. The back of the amp is pictured below