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The Pioneer TS-A25S4 is a 10-inch component subwoofer engineered to provide powerful and accurate bass reproduction in your vehicle's audio system. This A-Series subwoofer is built with a durable IMPP cone, reinforced with carbon and mica, offering both rigidity and lightness for responsive sound. With a maximum power handling of 1200 watts and a continuous RMS power rating of 350 watts, the TS-A25S4 is designed for significant audio output. It features a single voice coil with a 4-ohm impedance, allowing for straightforward installation and efficient power transfer. The elastic polymer surround and polycotton spider contribute to its robust construction, ensuring longevity and consistent performance. This subwoofer boasts a wide frequency response from 22 Hz up to 1.4 kHz, capable of reproducing deep lows and mid-bass frequencies. Its sensitivity is rated at 85 dB (1W/1M), indicating good efficiency. The mounting depth is 5.625 inches, and the cut-out dimension is 9 inches, making it suitable for a variety of enclosure types. Pioneer recommends a vented box volume of 1.1 cubic feet or a sealed enclosure volume of 0.8 cubic feet for optimal performance. Pioneer notes that the fitment guide is provided for reference only and advises customers to check all dimensions, including mounting depth, to ensure proper installation in their specific vehicle.