Built-in 10 watt amplifier, perfectly matched to a 10cm full range driver delivers a big sound, full of clarity from this small, versatile monitor. Best used in pairs, they accept any line level input (XLR & phone jack), so they are ideal for use with instruments in project studios, on stage, in remote recording vehicles, video productions & multimedia presentations. Manufactured from cast aluminum, these great little monitors have earned a high reputation among production, broadcast & presentation professionals for being rugged & road worthy.  Shielded.