Little Dot Micro+

(image taken from http://www.head-fi.org/t/561000/little-dot-micro) The Little Dot Micro+, or LDM+ is a portable solid state amplifier. It produces a transparent sound and runs on a lithium ion battery that, reportedly, lasts over a week on a single charge. Little Dot no longer offers this portable amp for sale, but stock lingers around auction sites and small dealers online.