"tightening" the low end/palm mutes... LANEY GH100TI inside...

[Hellswrath]

Still got a crazy feedback, but I actually can manage with it, using the switch on my guitar to cut it when I need silence so I can still play with the feedback (EyeHateGod man, EyeHateGod) !
Thanks for the tip either way, northern man!

[Argos]

Could you use a rack preamp for the same purpose?