Skullcandy, which sells stylized headphones and other audio products and accessories in 70 countries, announced terms for its IPO on Wednesday. The Park City, UT-based company plans to raise $150 million by offering 8.3 million shares at a price range of $17 to $19. At the mid-point of the proposed range, Skullcandy will command a market value of $514 million. Skullcandy, which was founded in 2003 and booked $175 million in sales for the 12 months ended March 31, 2011, plans to list on the NASDAQ under the symbol SKUL. BofA Merrill Lynch and Morgan Stanley are the lead underwriters on the deal, which is expected to price Tuesday, July 19.