The LD Systems DDQ Sub 212 is a powerful active subwoofer with two specially developed 12″ bass speakers and digital signal processing, specially conceived for use in combination with the full-range speakers of the DDQ Series. It ensures deep bass reproduction in PA systems and can also be matched to the satellites/tops of other manufacturers.
The two woofers with 3″ coils and neodymium magnets are driven by two 700-watt Hypex Class D power amplifier modules with a highly efficient switching power supply and a RMS output of 1400 watts. The DDQ Sub 212 attains a maximum sound-level pressure of 132 dB over a frequency response curve of 38 – 120 Hz.
The Sharc DSP programmed especially for the DDQ subwoofers has a large dynamic range of 127dB/113 dB (ADC/DAC) and handles frequency and phase correction in addition to providing extensive protection functions for reliable operation. Its 1ms look ahead limiter provides for distortion-free reproduction even at maximum volume levels. Seven DSP Presets permit selectable crossover frequencies between 80 and 120Hz. Eight additional presets make it possible to realize cardioid configurations of 2 or 3 subwoofers, whereby it is possible to attain rear attenuation of up to 20dB. The inputs and outputs as well as the separate mono output with a 100Hz high-pass filter use Neutrik XLR sockets. Additional features are LED function indicators and a ground lift switch; the volume and preset encoders can be deactivated to prevent inadvertent adjustment.