OrderBorder offers the SRS Labs iWow 3D Audio Enhancer for iPhone, iPod, or iPad for $30 plus $4.95 for shipping. That's tied with our mention from three weeks ago and the lowest total price we could find by $15. This device purports to create a bigger and wider sound field. It works with any headphones or earbuds. Deal ends April 17 at 2:59 am ET.