OEM Digital Bass Restoration Processor                                                                                                                                                                                                                                                                                     The MASSIVE BASSPRO, is a bass-frequency digital processor. This unique product is based on an advanced DSP technology, which extends the perceived bass frequency response below the physical low-frequency cut-off in an audio system. It is based upon psycho-acoustic effects. The key processor includes an advanced digital optimized DSP, sigma-delta Analog-Digital Converter and Digital-Analog Converter with high quality analog circuitry. You will enjoy how great the BASSPRO will make your bass deeper and stronger.