HBE power Screamer 2 channel: on & off/boost 可切換3段音色，大致上分為 1. overdrive with comp (left) 2. overdrive without comp (middle) 3. overdrive with fuzz (right) 盒書都在，狀況如新，欲交換其他overdrive or distortion 新竹可面交，可參考下列音色: http://www.youtube.com/watch?v=K-LVbHtuAdI http://www.youtube.com/watch?v=Y4sSUqxDooI 謝謝