Pkg (2) SW10-D4 + SS600 - DD Audio Digital Designs 10" Dual 4-Ohm 600W Subwoofers + SS600 Monoblock Amplifier. Impedance: D2 / D4. Watts RMS: 100 - 300. The classic DD AUDIO style heat sink is used in this upgrade for max cooling with 50% more side wall thickness than industry norms and extra long fins to increase surface area.
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