Alternatives to the Mad Professor Ruby Red Booster

67Audio Libido

Shared character: boost, dark, true_bypass

Demon FX Full BB Preamp

Shared character: boost, treble, gain

Sonicake Trio Rider

Shared character: long_cable_runs, high_end, true_bypass

Matthews Effects The Pocket Drive Overdrive Boost

Shared character: boost, overdrive

Hiwatt WEM Copicat Boost

Shared character: boost

Carl Martin Hydra boost

similar tone character

Fender Engager Boost

similar tone character

TC Electronic Spark Mini Booster

similar tone character

Catalinbread Sidearm

similar tone character

Blackstar LT-Boost

similar tone character

Electro-Harmonix LPB-3

similar tone character

Xotic RC Booster

Shared character: boost, treble, touch

Xotic BB Preamp Andy Timmons Limited Edition Pedal

Shared character: boost, true_bypass, pedal

Analog Man King of Tone

Shared character: boost, market, treble

Rodenberg LDP Overdrive/Clean Boost

Shared character: pedal, boost, overdrive

Crazy Tube Circuits Super Conductor

Shared character: boost

J. Rockett Archer Clean

similar tone character

Beetronics Buzzter Boost Preamp

similar tone character

Spaceman Effects Atlas IV

similar tone character

Bogner Wessex V2

similar tone character

Klon KTR

Shared character: boost, true_bypass, touch

Colorsound Power Boost

Shared character: boost, dark, treble

Suhr Koko Boost

Shared character: boost, true_bypass, pedal

Matthews Effects Architect

Shared character: true_bypass, boost, overdrive

IK Multimedia Z-Tone Buffer Boost

Shared character: long_cable_runs, high_end, true_bypass

Mooer Solo

Shared character: boost, overdrive

NuX Ace of Tone Dual Overdrive

Shared character: boost, overdrive

Blackstar Dept. 10 Boost

similar tone character

Xotic BB Preamp

similar tone character

Catalinbread VariOboost

similar tone character

Dunlop MXR Super Badass Dynamic Overdrive, model M89

similar tone character

Black Arts Toneworks -Skyboost

similar tone character