⭕ The Ultimate Studio Loudspeaker Original JBL Model 4350 Studio Monitor. The JBL 4350 is a four-way system designed for bi-amplification. These Studio monitors are capable of wide dynamic range with low distortion and of the high acoustic output required for precise reproduction of the original sounds. Unlike many theater type loudspeaker systems that exhibit sensitivity peaks in the midrange the 4350 provides substantially the same sensitivity from the full range of frequencies. Measured sensitivity below 500 Hz or above 2 kHz may be considered greater than that of other systems claim higher sensitivity ratings.