The World’s smallest vacuum tube stereo power amplifier.
Not as elaborate as the Fatman iTube, the Zvex iMP AMP intended for use with any MP3 player, laptops, CD players, or replace your PC speakers with a pair of real bookshelf loudspeakers. Measuring 4.4 x 3.0 x 3.0 inches small, the iMP AMP is intended for use in the studio, on your desk or area with limited space. Only generating 1W/ch, you’ll need an efficient pair of loudspeakers to play it loud.
More Detail Info at Zvex website.