I have tried recording in another room but nothing changed..
I have added a multiband compressor at the end of the signal chain and set it to 140Hz to control the problem frequency, the graphic changed a lot but the track was still a little boomy, so i have to add a post eq on the daw like this
View attachment 24294...
In my opinion, low passing should be done before multiband compression. If your DAW has a multiband compressor plugin, I'd use that over the one in the Axe-Fx.
I feel like I'm beating a dead horse here, but start with your high-pass filter set anywhere between 60Hz and 140Hz. You'll start your guitars off right by getting rid of the messy and useless frequencies first.
Looking at your linear phase eq picture is quite shocking. If you're having to pull over 20db out at multiple spots in the lows and low-mids, that's a big red flag. There are many non-linear peaks in the low to low-mid region on guitars, so you have to be careful not to get to crazy with the eq bands which in turn will neuter your guitars and cause phase shift insanity.
This is where multiband compression comes in handy. Again, use your DAW's version because it should give you greater control. Set it up to only compress the 70Hz to 250Hz range, or somewhere about in that ballpark. Use your ears. Don't thin out your guitars too much, but let too much through to where you're stomping all over the bass guitar.
Final words though, get your guitars sounding good at the source first and foremost. Get your midrange nice and balanced first, since this is where guitars live. Next get your low-end balanced. Also, no matter how much room treatment you have or what IR you use, there is always going to spikes in the low-end that jump out and cause that bass/guitar crossover area to be troublesome.
The thing with guitars is to remember that they don't take processing very well. Get where you need to go with them in the shortest steps as possible. Do more with less.
...
