12v汽车重低音炮I功放板 12V大功率重低音6寸8寸10寸低音炮通用 POWER- GND +12V REM CAR AMPLIFIER POWER CROSSOVER FREQ BASS FULL 50H2 CAUTION 250HZ HIGH SPK HIGH IN LIN RIN MP3 IN VOLUME LINE MA 大管对管功率足