Citronic Monolith MK3 Array Column Speaker System (Single) Monolith MK3 is an active subwoofer with inbuilt USB/SD player and Bluetooth®, powering a pole-mounted satellite column speaker to provide a convenient full-range PA setThis 3rd generation of the Monolith is driven from an efficient 400+100Wrms class-D amplifier section with bespoke DSP control, delivering powerful sub frequencies, punchy mids and sparkling highs. Supplied with a height adjustable 35mm pole and SPK link lead, each set can be used independently as a mono stack or in pairs or multiples for stereo or larger PA setups. The modular nature of this set makes it perfect for solo performers, DJ setups and conferences amongst many other applications.