In a microphone, a deterioration in frequency response of sounds arriving from off-axis locations. In a loudspeaker, a deterioration in perceived frequency response when the listener is standing off-axis.
"Wow! Very impressed with my first experience with your company. I had purchased a Laserdisc from eBay of the legendary harpsichordist Scott Ross, then considered a few businesses that do conversion. Yours was the only one not to say 'sorry, pal, we don't do PAL' (in fact, I found your website saying you welcome both NTSC and PAL Laserdiscs). ..."
