From manufacturer:
The EVH 5150 Overdrive features multi-stage MOSFETs, a 3-band EQ, a Boost switch, and a noise gate for a versatile range of OD and distortion tones.
Gearank – Music Gear Information for Live Performance or Studio
The EVH 5150 Overdrive features multi-stage MOSFETs, a 3-band EQ, a Boost switch, and a noise gate for a versatile range of OD and distortion tones.