Had some VU meters lying around, and they are fun to watch! The 12 volt board is from eBay and just about everything else from either Rat Shack or stuff I had lying around. Driver board is adjustable to match VU meters to output of board. I just put my tuner in mono and set for "0 to +1" reading. Of course almost all radio stations are over-modulating their signals, can't do anything about that.
This is hooked up to my record out on my AVA Insight+ preamp, which I use primarily for FM listening, with my wonderful Marantz ST-17B, Sony XDR-1FHD, Onkyo T-4555, Denon TU-1500RD and Yamaha T-07 tuners.


BTW, it's not fun cutting rectangular holes.......
Wayner