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Featuring a PBTL/SUB switch for convenient operation as a full-range or subwoofer amplifier. A dedicated SUB output is engineered for active subwoofers. It is compatible with both passive and active subwoofers. Two units can be employed to independently drive left and right channels, preventing mutual interference. Maximum 300W output power: utilizes a TPA3255D2 amplifier chip and includes a 32V/5A large power supply, adequate for driving 320W passive speakers or subwoofers. It also pairs effectively with outdoor, bookshelf, computer, desktop, ceiling, and floor-standing speakers. Superior design and HiFi sound: incorporates a gain switch for 2-level output level adjustment (32/36 dB) and SUB frequency tuning (40-300Hz). Compact size with a refined look: a mono integrated class D amplifier featuring a simple, small design and robust functionality. It boasts a more stylish and resilient solid aluminum chassis, ideal for HiFi home and desktop audio system applications