Our RBN subs are designed to deliver FULL power and deep sound where it matters most. Constructed of heavily braced 18mm birch plywood, the RBN sub is perfect for installations or portable applications where audio quality, reliability and efficiency are of the utmost importance. Incorporating the latest digital signal processing technology, the RBN subwoofers feature two XLR/1/4" combination inputs, a 3.5mm input, and a mic/line level selection. Each input features digital infrasonic high-pass filters, a 9-band graphic EQ and delay.