Precision-engineered for audiophile rooms, mastering suites, and professional studios, the CantonBass is a tunable low-frequency absorber developed to meet these requirements, offering exceptional performance in the absorption and tuning of low frequencies. Unlike traditional wall-mounted systems, the CantonBass requires no installation; simply place it on the floor, in a vertical or horizontal position, and find its optimal location within the room. Each unit contains two dual, carefully engineered resonant boxes equipped with two custom membranes manufactured in-house to guarantee consistent performance across the adjustable frequency range. One box tuned to the fundamental frequency and the other to its harmonic, allowing for fine control and correction of acoustic anomalies in rooms where low-frequency sound accuracy is critical. This innovative solution was successfully applied to fine-tuning the mixing room of Jesse Joschua’s studio, achieving outstanding acoustic results and setting a new benchmark in low-frequency management. We supply these panels tuned to 32Hz, 40Hz, 50Hz, and 80Hz, and at their fundamental harmonic frequencies above, in the standard sizes of 120×60×30 cm and 60×60×30 cm, with other customized sizes available upon request.