ATC exclusive act – The SCM150ASLT is a 3-way active loudspeaker system built to order in very limited quantities. The driver complement is a 25mm soft-dome tweeter, ATC's signature super-dome 75mm midrange and an SB75-375SL woofer driven by six channels of external class AB amplifier with electronic crossover housed in an elliptical billet-aluminium chassis. That dispatches 200w to each woofer, 100w to each midrange and 50w to each tweeter. Each speaker weighs 116kg, stands 1.4m tall and is finished in crown-cut walnut veneer under high-gloss polyester lacquer.