DURABLE CONSTRUCTION: Built to withstand the demands of professional use, the HA-P15WS8 features a robust construction that ensures durability and consistent performance, making it well-suited for challenging audio environments. The Harmony HA-P15WS8 Replacement 15" Pro PA Subwoofer is crafted for professional audio applications, delivering a potent 800W output to enhance low-frequency performance in your sound system. 15" SUBWOOFER SIZE: The 15" size strikes a balance between size and powerful bass reproduction, making it suitable for various speaker cabinets and audio applications. Featuring an 8-ohm impedance, this subwoofer offers versatility in system integration, ensuring compatibility with a diverse range of amplifiers and audio setups in both professional and home environments. HIGH POWER HANDLING: Capable of handling a substantial 800W of power, this subwoofer delivers a high-output performance, ensuring clear and impactful low-frequency reproduction in your sound system. As part of the Pro PA Series, the HA-P15WS8 is engineered to meet the demanding standards of professional audio applications, providing reliable and consistent performance for sound reinforcement. PRECISE AND CLEAR BASS: Focused on high-quality audio reproduction, the HA-P15WS8 ensures precise and clear bass, contributing to an enhanced overall sonic experience. The subwoofer is optimized for a wide frequency response, delivering deep and rich bass tones that contribute to a full and immersive audio experience. PRECISE REPLACEMENT: Compatible with Mackie Thump15A TH-15A, the HA-P15WS8 ensures a precise fit without any modification required. It seamlessly replaces the stock woofer, maintaining the integrity of your speaker system. Its dimensions, mounting points, and electrical characteristics are designed to replicate the performance of the original speaker, maintaining the integrity of your audio system. ADDITIONAL ITEM SPECS: The 15" PA Woofer, with a weight of 27.4 pounds and item dimensions of 18 x 18 x 8 inches, delivers a maximum output power of 800 watts. Specifications: 15" Pro Audio Midrange PA Woofer Power Handling: Peak: 800 watts RMS: 150-400 watts Sensitivity: 93.7dB Frequency Response: 37Hz-4kHz Magnet Weight: 48 Ounces 2" Copper Voice Coil Single 8 Ohm Features: Fiber Reinforced Paper Cone Ribbed Cloth Surround Rolled Steel Basket High Flux Ferrite Magnet Detailed Specifications: Voice Coil Diameter: 50.8mm Voice Coil Height: 15mm HE Magnetic Gap Height: 10mm Voice Coil Bobbin: TIL Xmax: 2.5mm Magnet Layers: 2 Cms (Suspension Compliance): 0.229 Qms (Mechanical Q Factor): 5.74 Qes (Electrical Q Factor): 0.84 Qts (Total Q Factor): 0.73 Mms (Moving Mass): 77.65 Vas (Equivalent Volume of Compliance): 238.8 L Rs (Resonant Frequency): 37 Hz SD (Effective Piston Area): 855.3 cm2