DD AUDIO 818 DD Audio DVC DD-818-D2 RRP: $1,099.95 Our Price: $999.00 Or 4 payments of $249.75 with Info More info DD AUDIO 9518 18" 9500 Series Subwoofer RRP: $2,199.95 Our Price: $1,999.00 Or 4 payments of $499.75 with Info More info DD AUDIO 9918 18" 9900 Series 4" Voice Coil ... RRP: $3,299.95 Our Price: $3,199.00 More info DD AUDIO Z18 18" Z Series Subwoofer * Custo... RRP: $11,199.95 Our Price: $11,198.95 More info