Check the listing for details. Wampler Mini Ego Compressor Effects Pedal. Condition: New. Listed at 149.97 USD. Now widely regarded as an industry standard in guitar pedal compression, the Mini Ego Compressor effects pedal delivers control and versatility to today's guitar players.What does a compressor do? A compressor adds an element of control to your playing level—it will bring the quieter parts up and the louder parts down. While an ordinary compressor pedal can give you an element of control, a great compressor will give you the "feel" that other average compressors lack. If you’ve played a great tube amp when it’s being pushed hard, you’ll know what a great natural compressor feels like.Based on the incredible success of the original Ego, but featuring switches for tone (dark and bright) and attack (slow and fast) you can tweak your tone to a standard of a pedal twice its size.