Thanks to how thin this planet's atmosphere is, 180 is right about the physical limit of SPL production. Anything significantly higher than 180 (181,182,183) could be done underwater. But to answer that one, no. Plus I don't think anyone within audible range of you would think highly of you for going for an SPL record at 12,000hz. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif
I have a question of my own. Not entirely related, not entirely off topic. Are there official frequency ranges for subbass, midbass, midrange, and highs? I've always thought it was just two octaves up starting at 20hz. (20-80 subbass, 80-320 midbass, 320-1280 midrange, 1280 up highs)