#1
Anyone ever heard of this in reference to a JCM 800?
Marshall JCM 800 2203
Peavey 5150 II
Marshall 1960AV
Avatar 4x10
Gibson Studio Alpine White
DL4 Delay Pedal
Boss CH-1 Super Chorus Pedal
Boss TU-2 Tuner Pedal
Boss NS-2 Noise Suppressor Pedal
Holy Grail Plus
Ernie Ball Volume Pedal Jr.
#4
Maybe you're talking about the kerry king model?

"The Beast switch, that activates custom noise gate and variable gain boost with King's custom EG curve!"