Level matching your speakers isn’t a topic that gets talked about much these days. With auto-calibration systems like Audyssey MultEQ, Yamaha’s YPAO, Anthem’s ARC, etc., it’s generally done for you.

Ask almost anyone in the industry and they will tell you the proper fill level of HCFC-22 in a recovery cylinder is 80 percent of the water capacity. Wrong! Most will also say this is an Environmental ...