I’ve had this Audio Technology Model 510 LED VU meter since the 80’s. Just recently rediscovered in a box, I thought I would do a little research on it. There is nothing that I could find. No specs, no company history (Audio Technology has not existed in quite some time). There are a couple discussions on message boards about the device, but little in the way of historical info. I will update this entry as I come across any additional information, but in the meantime here are a few pictures of my device and a scan of the original owner’s manual.
Here’s the link to the owner’s manual: