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Sr2-4500DSP 2-Channel High Power 4500W Home Subwoofer Amplifier Plate with DSP. Ultra-Quiet DSP: Features advanced German ALLDSP software for clean sound with ultra-low distortion. Efficient Cooling: Ultra-quiet cooling system ensures extremely low heat generation. Durable Design: 2U chassis with genuine Neutrik connectors and long-term stable operation. Flexible Customization: Offers full customization, minor customization, and flexible options from samples or designs. Fast Lead Time: Average lead time within 15 workdays for both peak and off-peak seasons. Certified Quality: RoHS and CE certified with 100% visual inspection for finished products.