PEQ level adjustment changes impacted all channels in the DSP engine. It’s a code fault.
I reported this issue.
The work around is to use convolution, or a mix of positive gain to offset driver efficiency/amp gain as needed. Then dial back headroom accordingly.
Im certain your Okto should also have individual channel volume adjustment and overall group volume. Check your manual.
I use convolution now.
Ticket is in. Overview here.