Topping introduces the PA3s , a small , balanced Class D amplifier that’s simple, powerful and affordable. It is based on two Infineon MA12070 amplifier chips and has two balanced and single-ended outputs.
Balanced and Single-Ended Inputs
The PA3s offers dual input to suit any need or system. There is a single-sided stereo RCA input and a balanced dual input made on 6.35 mm TRS jack connectors. Using a balanced input eliminates any potential ground loop issues, promoting clear sound. Input selection is carried out directly from the button on the front panel.
The 2x class D balanced amplifier MA12070
PA3s is based on a pair of Infineon Merus MA12070 class D amplifier chips, which allows it to develop power of 2×65 W at 4Ω or 2×37 W at 8Ω with high efficiency. Moreover, this balanced architecture, with one chip per channel, significantly reduces crosstalk for accurate reconstruction. Heat is dissipated using a large heatsink covering two amplifier chips.