Pheeew. Yeah, I was all prepared for the gig last saturday. My amp had been behaving well 'cept a inexplainable "outburst of terror" just before last pratice before the gig. (It was this thunderstorm of noise, quite hellish. This insane outburst I suspect could come from a malfunctioning output jack on the cabinett, I've fixed that before. I unplugged everything, plugged in the exactly the same way again, and ALAS! Everything worked just fine ... I've had some problems with my rig, an old 1976 Marshall cabinet and my 1987x the last 6 months, its been on and off, but it has, for some weird reason, turned out OK every time, without any work, cept changing of tubes. (Yeah, I KNOW i should have had it on a service ... but then again, I should not sit here and type; I should be home playing guitar) Yeah... I was SO looking forward to finally unleash my amp's true valve-torturing distortion on the audience, with my new Koch attenuator and all it seemed like I was just about to do just that. But wait a minute ... things NEVER go that smooth, not with this band, haha. The pratice on Wednesday went fine, guitarsound was stellar, everythings ALL GOOD. Still, I had a sneaking suspense when I went home that night, even though the amp had behaved totally fine the whole rehearsal. But as all we AC/DC-loving people all know, evil walks beside you ... Unfortuneately I had no chance to try out my rig anymore before the gig, and when Saturday comes, we set up, I turn on the amp, and - NOTHING. Its was a nightmare - the whole rig was dead silent. Some extremely frustrating and furious minutes went by, until I found out that the guy who runs the studio where we rehearse would willingly lend me his 1976 Master Volume JMP! And WOW!! I knew those amps rocked, but it sounded crazy good with my new 2018 supercharged SG Standard! And here the fun starts, hehe! Dig this: The guy I borrowed the amp from has 3 - three - old JMP 50 watters ..! Aaaand he loves my (when functioning) modded killer-sounding amp... Thing is, he said, several times, that he has got three 50 watt JMPs... Without me mentioning it, he also pointed out that my amp was approx at the same value as his, on price. Oh yes ... He didnt spell it straight out, but it seems to me that there is a really good chance that I could swap my 1987x with a '70s Master Volume JMP.... Its so typical, now that I finally got this killer attenuator and all, I suddenly find out I have a chance to get me an old master volume JMP.... (I had no idea the guy was maybe willing to part with one of those amps...) That JMP sounded sooo good ... I want both. Sigh.