The JBL Stage GT90041 is a compact Class-D 4-channel amplifier engineered to reproduce music from deep bass to crisp highs across a 20Hz-20kHz frequency range with total harmonic distortion below 1%.

Its high-efficiency design delivers strong output with minimal heat and includes protection circuitry for short circuits, over and under voltage, and thermal overload. The amplifier is suitable for powering speaker arrays or bridged subwoofer channels and fits in tight installation spaces; professional installation is recommended.