View this article at: http://www.electronista.com/articles/07/10/04/m.audio.ie.40.earbuds/ Thursday, Oct 04, 2007 4:00pm M-Audio ships IE-40 referen... Audio equipper M-Audio is now shipping its IE-40s, a set of reference-level earbuds. Each bud is fitted with three different drivers, devoted to high-, mid- and low-end end frequencies, and reproduces a range between 20Hz and 16kHZ. Sound is further divided into separate acoustic canals, so that high- and low- end sounds do not intermix. The buds also come with four different sets of tips, providing a tight fit, and shapable ear loops to keep cables out of the way. A bundled attenuator caps the volume of loud sources, while the earbuds' main 46-inch cable can be replaced if damaged. The IE-40s are shipping today for $500 with a metal carrying case.