What interesting or unusual gear has passed though your system during your audio life?

An N.E.W. DCA-66 amplifier. It’s powered by four 18 Ah batteries. Didn’t sound too bad. It’s not in my system right now but I still have it. It was making some strange noises and I need to investigate the cause. Hopefully it’s a small issue.

Interesting, that’s the same sound I am hearing! How did you like the the amp? Due to some issues with my preamp, I feel like I never got to drive it properly and never truly heard its full potential. If you ever hear back what the exact issue was, please pass that information along. I would like to get it up and running again one day. 

Just wanted to chime in to say I replaced two of the batteries and the amp is working flawlessly now. My issue turned out to be no big deal. One of the batteries must have gone bad. Figured if someone came across the same problem, they would like to know what worked in my situation. I also heard from the previous owner that the built-in charging system can be hard on some batteries, especially when float charging. They recommended leaving it unplugged once the batteries were charged up. I plan to keep an eye on the voltages and only let it charge when the batteries need it.