The TA7066P is original monolithic Intregated Circuit Audio Power Amplifier. Package IC is SIP10-16 and manufactered by TOSHIBA. The above sequence is a series of low-grade intregated circuit amplifier , which was very small output . But this amplifier is very high impedance power output. For more details , see description below. Technical information : Min. Voltage : 8 Volts DC Max. Voltage : 25 Volts DC Max. Power : 0,3 Watts Impedance : 150 Ohms Min. Currents : 2,8 mA