- Have you ever looked at the frequency response of your bass in an analyzer? In my experience the second harmonic (so ~70Hz for you) is where all the beef lives. Sub bass extension is awesome, sure, but it's just helping out.
- Don't forget that the amp profile includes its own EQ response too, separate from the cab. Have a look at the thread in my signature; there's a PDF there with lots of handy pictures. Specifically, take a look at the Amplifier section on p18 - the red image on the right-hand side is as close to "flat" as that particular profile gets.
No I didn't analyzed the frequency response of my bass, how you do that and what do you use for that ?
Thank you for the link, you made an awesome job man, that's huge
So if I understand well, everything is normal ?