Amazon.com: CP-BOOSTER Optical Compressor Guitar and Bass Effects Pedal Pure Analog for Electric Guitar and Bass True Bypass BLOKAMUGT (Black REV3.0) : Musical Instruments
OKKO CocaComp MKII Compressor Boost - stringsshop
Secret Weapon Guitar Pedals and How to Use Them: EQ, Compression and Treble Booster - YouTube