The PE4 is a compressor pedal created based on the circuit diagram of the legendary Keeley Compressor C4. While the constants have been slightly altered, it's a noiseless and natural compressor that follows the ease of use of the original. It features Attack, Sustain, Clipping, and Level knobs, allowing for a wide range of sound creation. I was surprised when I used it myself; it really works naturally. Even when playing solos with long tones, the sound extends without any unnaturalness, and by increasing the Attack, you can achieve a cutting-oriented setting like the MXR compressor. The Clipping knob adds distortion when turned up, but it thickens the sound. Finding the sweet spot depending on the type of pickup is the recommended way to use it. Also, by setting the compression to a subtle level and increasing the Level, it can be used as a clean booster. It's a pedal that can always be on, helping to balance the sound within a band ensemble. Please give it a try. It will be created and tested after your order is placed. *It only runs on an adapter. I make various other pedals, so please check out my profile. Demo videos are uploaded on YouTube. I can't post a link, but please search for ksstomp