Ther kind my son-in-law brought over. Someone said spyder? I just play acoustic. The only amp I have runs my electronic drums. That spyder is a nice amp though, my acoustic electrics sound great on it. I just seldom plug in, myself. He brought it over for his acoustic electric bass he also leaves here with his keyboard and such. I have the studio/jam room at my house, so he leaves some of his instruments here for jam sessions.