[Testpattern]

I'm new to this so please bear with me.

I've notice there's a significant amount of response above cutoff which is shown on my graphs when playing with the sub only. It is down about 20-30 db but there appears to be something present. I would anticipate an octive or two after cutoff should look like a flat line way down in the mud?

Is this normal for REW or most likely I've done something dumb?

Thanks