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Have you explored active monitors? They use a sophisticated low voltage crossover to feed one channel of amplification per driver for better dynamics, bass extension per cabinet size, and greater precision. Desktop JBL 305 Mk2 ($300/pair) is one example that sounds great and fills a medium sized room. More expensive ones add DAC's, wireless connection, and room correction DSP. Just add a source or two. No power amp, speaker cables, or a stack of drivers needed. Not your backyard/garage endeavor though.