The Kirmuss Audio KA-RC-1 (also known as the "In the Groove" system) is the brand's primary offering, designed specifically to restore vinyl records rather than just performing a surface clean. This machine is widely recognized by experts as one of the most effective and affordable ultrasonic cleaning solutions for vinyl records. It uses a patented 35 kHz ultrasonic frequency to create cavitation, generating micro-bubbles that dislodge deeply embedded contaminants like mold release agents and grit. According to Stereophile , the system can restore top-end detail and significantly sharpen transients, making backgrounds "superquiet" for an almost new listening experience.