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With the rise in popularity of Class D amps, it would seem to be a no-brainer for active speakers to begin to flourish in the marketplace. Their small size and light weight certainly make it feasible to attach them to full sized full-range towers.
I think it would take one of the big boys in the passive speaker camp to start offering an active speaker option to get things going on a large scale.
I would hazard to guess that 99.9% of the speaker systems here on the 'Gon are passive. Not counting subwoofers of course.
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