Product Details 2x50W 4 Ohm Class D Audio Amplifier Board - TPA3116Don't let the size fool you, the TPA3116 amp board delivers 2 x 50W into 4Ω loads. This device operates from 8V to 26V and provides a high PSRR, eliminating the need for a regulated power supply. The TPA3116 has the ability to be used as a small car amplifier, because it offers up to 90% efficiency at 12 VDC.Comprehensive