@bigwave1 said
Have a look at the GR Research-Line Force with Servo Subs. Some DYI but not impractical. Line source and line array, efficient cutting edge. I believe without servos,12K. I’m drooling.I'm planning to build a set of these and am currently collecting the parts. I have a pair of GR-Research NX-Oticas which are absolutely stunning speakers for the price (around $3K, $6500 with two triple-stack servo subs, plus 40-50 hours to time to assemble and finish them). Given how good these sound, I decided to splurge on the Line Forces. I'm hoping to have them built this winter.