I got the SYN2 and the Metroplex module in from Sweetwater yesterday. Was able to spend only a little time with it. Until I get a line mixer and get my MPX G2 running, it’s nice having a stereo fx loop for delay/reverb pedals. And the speaker sim was definitely usable for a silent practice at night with headphones. I only have 2 modules at this point, the Metroplex and an MTS-era Salvation MarkUs. The standout was the MarkUs. This is the Mark Sound I’d heard on records with real bottom end that I hadn’t been able to get in the IIC+ and IV modes of my Mark V:25. The Metroplex has a good sound. I wish the blue channel went from more clean into mid-gain territory, but I knew it didn’t going into it. I’ve got a good mid and higher gain sound with the two channels. I do wish there was more treble on tap, or a bright switch. I’ve got the treble basically dimed but it could still use a touch more bite for my taste. I’m simply coming from pedal-land and my main Marshall sounds come from a Bogner La Grange, which can tear it up on the high end. Maybe I’m just used to that. On to today’s discovery. This morning the unit was on for about 30min in bypass while I was busy getting distracted instead of playing. Came back to start playing and volume was whisper quiet - it was still hooked up through a little Mackie mixer w/ headphones from last night. Input meter barely showed a blip, though nothing had changed setup wise. Thinking there was maybe a heat issue, I turned the SYN2 off and pulled the modules out. Nothing else but the Furman power strip was on in the rack, so I doubted why it would be a heat problem. Both modules were warm like I was imagine a tube preamp would be, but not hot to the touch. Put them back in, waited a bit longer, and turned the SYN2 back on. Voila, had full volume back ... for about 2 minutes, before volume quickly faded back down to almost non-existent. I emailed my Sweetwater rep, but don’t expect him to get back to me until after the break. But what could be the issue?