1970s Petros I - Rock Amps

1970s Petros I by Rock Amps This is a solid-state Petros I combo built by Rock Amps. Based on the logo and front-panel decal, this particular 1x10 model appears to date back to the mid-to-late 1970s. Rock Amps seems to be pretty obscure. I couldn’t find much information on the company, except that they operated out of Pomona, CA, and built models like the Petros I during the 1970s and into the early 1980s. Settings: [Positions relative to a clock face] ['0' meaning off] Dist = Distortion T = Treble B = Bass Vol = Volume Microphones [Placement labeled below] Shure SM57 Beyerdynamic M160 Electro-Voice 635a