Remember, this is all just my
opinion, and my tastes may not be similar to any sane or rational person, real or imagined. Anyway, here is the preamp;
What I've circled in
red are the treble peaking circuits. Also, circled in
blue can be considered a treble peaking circuit. It's the cathode bypass capacitor, and the low end cut off is determined by f = 1/2Πrc. Now with a 2700Ω cathode resistor, and a .68uF bypass capacitor, the boost happens above maybe 220Hz, or the 'A' note at the 2nd fret G string. Or maybe lower, this is just quick math after a few beer in me. Anyway, you can remove the .68uF capacitor, and lower the gain a little especially in the top end. Ditto for the 470pF capacitors in the real treble peaking circuits.
The gain will go down very slightly, but all in the top end. Remove the three capacitors, and if you miss the gain, there are ways to get it back, but over a wider frequency response. I have a hunch you'll like the amp without at least one of these capacitors, and more likely two of them can go and you won't mind at all. Well, it depends on your guitar, and the tone you want to hear. Again just my
opinion. But try it.