Featuring a dual 18" subwoofer pairing in a bass reflex housing, the DVA S30 packs a muscular, ultra lowfrequency punch. It delivers very powerful performance indeed with a range extending down to the lowest frequencies. This sub-bass powerhouse is the perfect addition to large PAs and an excellent complement to DVA T12 mid-/high-range units in stacked arrays. Bass reflex horn housing This sophisticated hybrid design brings together the benefits of bass reflex and horn systems in a compact housing engineered to render low frequencies with high SPL. The two baffle boards are arrayed in the form of a V. They guide the central bass reflex channel's sound energy into the horn's port. This funneling action is smooth and uniform, greatly increasing its range. The high-quality birch multiplex housing is covered in robust black textured lacquer and equipped with eight grips. On the back is a transport dolly that removes easily via quick release pins to keep the wheels from rattling. Specifications: Speaker Type: Active Bassreflex-Horn Subwoofer Acoustical data Frequency Response [- 10dB]: 41 - 120 Hz Max SPL: 141 dB Directivity: Omnidirectional, Cardiod Option with DSP setup LF: 2x18 " Voice Coil LF: 4 " Amplifier Amp Technology: Digipro® G2 Amp Class: Class D Power Supply: 3 kW SMPS LF Amp: 3000 W RMS Cooling: Convection Processor Controller: DSP 56 bit AD/DA Converter: DSP 24 bit/48 kHz System Presets: X-Over,Delay Phase: 0, 180 ° Limiter: RMS, Peak, Thermal Delay Option: 0-4.5 ms internal Crossover Frequency LF-MF: 75-120Hz | steps of 5Hz LF-Xover out slope: 24 dB/Octave Input Mechanics Housing: Multiplex birch plywood Housing Design: Rectangular Handles: 4x Per Side Accessory: Dolly, Wheels 100mm, Dust Cover, Rain Cover Rigging Points: 2xPick Points on top to fix DRK10/20 rigging frames Width: 1100 mm (44 in) Height: 580 mm (23.2 in) Depth: 720 mm (28.8 in) Weight: 83 kg (182.98 lbs)