#1
I have just received a Metal Muff that I'm running through an Epi Valve Jr. I play an ESP Viper with an EMG81 (Drop Cb) in the bridge. I have found a rhythm tone I am fairly happy with but for some reason, palm-muting sounds rather thin. I guess I would say that I want more sustain (ironic, since it would seem to defeat the purpose of palm-muting).

Since I can't afford a proper high-gain amp, is there anything I can do (besides EQ) to get thicker, fatter palm-muted sounds? I thought about changing the low E string to a heavier gauge. I have also looked into a compressor, but I don't hear of a lot of people using compressors for this purpose.

Any help appreciated.
#2
If you don't want the palm mute to cut the sound as quick, why not lessen the pressure you're putting on the strings with said palm?