8ch Car audio DSP processor with 8X150W output power amplifier
Amazon.com: Audiobank 1/2 Din Car Audio Digital Bass Processor, Sound Restoration & Crossover for Car Subwoofer with Bass Knob/Input Level: 15V RMS & Output Level: 13.5V Peak : Electronics
Amazon.com: Dayton Audio DSP-408 4 Input 8 Output DSP Digital Signal Processor with Built-in EQ, Crossovers, Time Alignment, and Input/Output Mixing for Home and Car Audio : Musical Instruments