[Wayne A. Pflughaupt]

salvasol wrote:

That's why there was a burning smell yesterday when I was doing the test ...

Cute!

... please explain me What this graph means ... i'm

Hmm... Well if you ask me, I think it means you’re going to have seven years of bad luck, followed by seven years of prosperity.

Just kidding. Seriously, it doesn’t “mean” anything. It is what it is. It’s the response of your mains and sub in the room, simple as that. At those speaker locations and that measurement location, at least.

That said, notice that your blue sub-only plot looks a bit different than your red front speakers plot, but your green combined plot looks just like the red one. This tells me that your mains are overpowering your subs. IOW, your subs really aren’t contributing anything useful. Maybe you should turn them up?

On the other hand, it appears your mains have better extension than your subs. Have you tried corner-loading the subs?

Regards,
Wayne