Double-sided SMT Epoxy PCB | 1-Ohm Stable Circuit |Two amp linkable function: Output master and input slave;24dB/Oct Variable Crossover Slope | 24dB/Oct Variable Subsonic Crossover Slope | Multi-way Protection Cicuitry (Thermal, Over Currect, Speaker Short, Speaker DC Protection);RCA Input and RCA Mater Output to RCA Slave Input | Input Sensitivity: 6V-0.2V | Subsonic Crossover Filter: 10Hz-50Hz;Variable Bass Boost: 0-12dB | Variable Los Pass Filter: 30Hz-250Hz | Signal / Noise Ratio: >100dB | Damping Factor: +150;Tested Voltage and THD: 14.4V and Less than 1% THD | Operating Voltage: DC 10V-16V Power Input Wired Remote Controller