The injection-molded graphite woofers are exceptionally lightweight yet extremely rigid. They provide a remarkable low-frequency range with minimal cone break-up and distortion, delivering the deepest, cleanest bass. The built-in fully digital amplifier of the R-100SW subwoofer offers ample power with high efficiency and source-accurate reproduction, ensuring maximum performance, detail, and sound that fills your home. The R-100SW's gain, low-pass filter, and phase controls ensure that low-frequency sounds blend seamlessly with other speakers and establish the ideal bass level for your space. Line-level/LFE RCA inputs provide maximum compatibility with standard home theater receivers. The reinforced MDF construction reduces cabinet vibrations, resulting in less audible coloration and improved sound accuracy, delivering the ultimate listening experience designed for durability. Exposed fasteners, flat magnetic grilles, and a scratch-resistant, textured wood grain vinyl give the R-100SW subwoofer a polished, modern appearance that perfectly complements the Reference series speakers.