The 6301N series are small monitors with built-in amplifiers for various kinds of monitoring. Model 6301-series have been on the market since 1982 as the standard active monitor speaker in the broadcast and production facilities and now Fostex have re-designed the speakers with the latest D-class power amplifier and new driver unit featuring energy saving "auto stand-by" function. The electrically balanced version used to be offered only in North America, but now worldwide.