Alternatives to the ISP Technologies Michael Sweet Signature Empyrean

Behringer HM300

Shared character: hard rock, response, distortion

Amptweaker Tight Rock 2

Shared character: metal, hard rock, distortion

NuX Fireman

Shared character: metal, hard rock, distortion

Wampler Dracarys

Shared character: metal, bass, response

Donner Extreme Driver

Shared character: hard rock, metal, distortion

Carl Martin Crush Zone

Shared character: metal, hard rock, bass

TC Electronic Jims 800 Preamp

Shared character: hard rock

JHS Pedals Hard Drive Distortion

Shared character: metal, hard rock, response

Universal Audio Uafx Anti 1992 High Gain Amp

Shared character: high gain settings

Black Country Customs Monolith

Shared character: metal, hard rock, bass

JHS PackRat 9-Way Rodent Distortion

Shared character: hard rock, response, distortion

Carl Martin Rock Drive

Shared character: hard rock, distortion, high gain settings

NuX Brownie

Shared character: hard rock, bass, response

Joyo British metal

Shared character: metal, hard rock, bass

Joyo Uzi Distortion

Shared character: metal, hard rock, bass

Amptweaker AT Fatrock

Shared character: hard rock, bass, distortion

Friedman IR-J Jake E. Lee Preamp

Shared character: hard rock, response, high gain settings

JHS Pedals JHS Kilt V10

Shared character: hard rock, distortion

ENO EX-Inferno

Shared character: metal, hard rock, distortion

Free The Tone HB-2 Heat Blaster Distortion

Shared character: hard rock, distortion, high gain settings

Sonicake Dejent

Shared character: distortion, high gain settings

Peavey Rock Master Preamp

similar tone character