Oklahoma City, OK, August, 28 2017 -- DD Audio announces the expansion of its D Series amplifier lineup with the addition of the D4.60. The D4.60 is a mini chassis, one-sided control amplifier designed to make space constrained installations a breeze. This next-gen full-range digital amp delivers 4 x 60 watts of continuous power into Oklahoma City, OK, August, 28 2017 -- DD Audio announces the expansion of its D Series amplifier lineup with the addition of the D4.60. The D4.60 is a mini chassis, one-sided control amplifier designed to make space constrained installations a breeze. This next-gen full-range digital amp delivers 4 x 60 watts of continuous power into