Alternatives to the Systech Harmonic Energizer

MXR Super Badass Distortion

Shared character: bright, gain, distortion

Fulltone Fulldrive 2 MOSFET

Shared character: round, gain

Colorsound Power Boost

Shared character: bright, gain

Catalinbread Katzenkonig

Shared character: bright, filter, gain

Klon Centaur

Similar role and voicing

Browne Amplification Carbon V2

Shared character: bright, gain

Amptweaker Tight Boost

Shared character: peak, wah, gain

Strymon Riverside

Shared character: gain, distortion

Boss SD-1 Super OverDrive

Shared character: simple, distortion

ProCo RAT 2

Shared character: bright, filter, simple

Mad Professor Sweet Honey Overdrive

Shared character: wah, filter

Suhr Riot

Shared character: bright, distortion

EarthQuaker Devices Zoar

Shared character: simple, gain, distortion

JHS Morning Glory

Shared character: bright, filter, gain

Dallas Rangemaster Treble Booster

Shared character: peak, bright, gain

Lovepedal ET-ST Eternity Stack

Shared character: gain

Electro-Harmonix Signal Pad

Shared character: simple

Silktone Overdrive Plus

Shared character: distortion

EarthQuaker Devices Special Cranker

Shared character: bright, simple, distortion

Xotic BB Preamp V1.5

Shared character: gain

Fulltone OCD

Shared character: peak, bright

Chase Bliss Automatone Preamp MKII

Shared character: distortion

Ibanez TS9 Tube Screamer

Shared character: simple, distortion

Marshall Guv'nor

Shared character: bright, distortion