I was surprised testing these two mini JCM 800 and Plexi 20 watt heads for bass over a few weekends at my friend's recording studio. I plugged both heads into a nice 4x10 bass cab and wow they sound incredible! This is definitely for aggressive rock and heavy music. Think a nicely overdriven classic Orange or SVT with Marshall roar and you get the idea. I had amazing Motorhead, Converge, Don Caballero, and Jesus Lizard tones in minutes. This is not a clean tone, but these amps are clear and articulate. I am excited to A/B these Marshalls with my Verellen MeatSmoke and my live 4x12 cab when my band records in the fall.