Morning All, I seek some advice. I'm on the verge of picking up a non Master Volume JMP 1 Mk2 50w, before I do I'm a bit concerned as I currently own an old British Made JCM 2000 DSL. Which I love, but after using a 100 watt JMP MV, I have been after one. I have found one in great nick for £850. But as its non mv I'm concerned that I won't be able to get a good dirt sound without taking out the windows. So have come to you wise folk of the forum for advice. Thank you for taking the time to read this.