This dumping current amplifier particularity of this assembly consists of the fact that by introducing the four pasive components R2, R3, L and C, all harmful influences originating in the nonlinear behavior of the final stage are removed. It has 1 IC (741 or LF357), and 6 transistors, the final stage in equiped with TIP142 and TIP147 transistors. continue reading…

This headphones amplifier circuit can deliver up to 1W on a 8Ω headsets. A stereo headset is connected, in generally, to an amplifier output through a voltage divider. This simple solving solution has 2 disavantages: the sound intesity cannot be adjusted independently from the speakers and the voltage divider lowers the attenuation factor for the headset which translates in bass altering. continue reading…

XM-604M car amplifier is produced by Sony and can deliver up to 60W x 4 RMS into 4 ohms or 70W x 4 RMS into 2 ohms and you can use it at 160W x 1 RMS into 4 ohms (Rear). It has a 80 Hz Selectable HPF/LPF and a 600W Max Power consumption. continue reading…

This MOSFET amplifier uses two complementary MOSFETs (IRF9520 and IRF520) to deliver up to 20W into 8 Ω speaker. A TL071 op amp is used as an input amplifier. The MOSFETs should be heatsinked with a heatsink of better than 5⁰C/W capability. THD is less than 0.15% from 100Hz to 10KHz. continue reading…