So I’ve searched a little bit and the general consensus is that cold weather (37~ degrees) should not have any effect on solid state amps. Last year around February I played a gig with a gk mb500 fusion amp. And about two songs in, the volume dropped drastically. Barely audible. Luckily I had a backup, my tc electronic bh500, plugged it in and no problem. Then yesterday I played a gig with the tc electronic bh500 and in the first song, same thing! Volume dropped. This time no backup. I turned up the master volume to compensate which did ok but I could feel like it was feeling a bit weird. The only “constant” is the bass manufacturer. That and the cold weather. First gig I played with an xotic xjpro vintage in blue with maple neck. But the gig yesterday was with my second xotic. Same make and model but different color. Fresh set of batteries (literally second gig with these batteries). No pedals, straight into amp, both gigs. What do you guys think? Now I’m wondering if I need to get a new amp. I can’t have my amp bugging out on me beginning of the gig!