Description Product Name: 2.1 Channel Circuit TDA2030 54 Watts Audio Amplifier Board Subwoofer Chip Type: Class AB Chip model: TDA2030 & JRC4558 Supply voltage: 12 12 VOLTS AC Output channel: 2.1 channel Output power: 18W 18W 18W Power efficiency: over 90% Impedance: 4Ω to 8Ω (Use 4Ω for Double Power) Frequency responce: 20Hz to 2000Hz Woofer Frequency responce: 20Hz to 250Hz Size: 11*8.05*8cm Dc 5v out for mp3 High quality pcb and improved sound quality.
