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About the VTF-3 MK3
The Hsu Research VTF-3 MK3 subwoofer is a well-engineered powered subwoofer with a 12-inch nominal driver and a 350-watt RMS Class-AB amplifier with tracking power supply. It features a dual 4-inch flared port design, a continuously variable low pass filter from 30 Hz to 90 Hz with a 4th order (24 dB/octave) crossover slope, and a switchable phase control (0° or 180°). The subwoofer offers line-level and speaker-level inputs and outputs, a 3-way power switch (On/Auto/Off), and a switch to select between maximum extension or maximum output modes. The enclosure measures 17" W x 22" H x 25" D and weighs 90 lbs. It is available in black or maple finish with a black grille and includes video shielding for placement near TVs. The unit is praised for its clean output, excellent bass extension for its size, and solid build quality. It comes with a 7-year warranty on the driver and cabinet and a 2-year warranty on the amplifier. The VTF-3 MK3 is regarded as a top-flight subwoofer offering excellent value and performance for music and home theater enthusiasts.
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