Re: tips on making single notes thicker
The EQ curve on your rig emphasizes the frequencies of your thicker strings and has left a sort of hole where you need some more midrange, but not any more bass.
The beef of the two highest strings is in the 400hz to 1Khz tonal area... the problem is that the frequency bands where your low strings have the most beef is right next to the frequency band that you want to boost.
You could very well boost that frequency band but end up giving a bit too much to the lower frequency band that you do NOT want to boost.
A graphic EQ with a nice tight "Q" could be just what the doctor ordered. You could also cut the frequencies that give the most girth to your low strings (that simultaneously don't do much for your high strings) and then increase your bass shelving EQ on your amp to balance everything out.
I know that with my rig(s), getting the high notes to have enough girth while making sure that your low strings aren't too fat was one of my priorities.
My Weehbo JMP Drive has settings for low mid, mid, high mid, bass and treble... it was boosting the low mid and mids while cutting the bass that helped me achieve bold and punchy high notes without woofy lower strings.
On my digital rig... I have a large cut at 50hz and boost around the 400hz-1Khz to beef up the high strings.
Obviously, if your action is too low your high notes will be dampened but you wouldn't be able to get crystal clear bends high up on the fretboard if your action was too low... I must admit, I have perfect bending range in the high notes but I have a good bit of relief and my action is sort of high.
Good luck
